Heyo, i was referred here for a topical question. I have an ESP8266, and im using a micropython IDE to talk to it, is there a way to have the ESP8266 create multiple wifi networks at once?
#microcontrollers
hallow igloo
here is code:
def create_networks(amount):
for i in range(0,int(amount)):
ap = network.WLAN(network.AP_IF)
ap.active(True)
ap.config(essid=wifiNameList[num])
The result of this code is that it makes only one network and just keeps renaming it
open dock
@hallow igloo I don't think that the ESP8266 (or ESP32) can advertise/support multiple SSIDs at once. what are you trying to accomplish?
hallow igloo
multiple networks a test
open dock
and the test subject is an external something that automatically scans/connects?
hallow igloo
mainly doing to test capabilities of the ESP8266
open dock
the only way i could see that working, is to store state information in an object/file, set an SSID, run test(s), and then move to the next SSID.
hallow igloo
i see
final question: what is the recommended method to generate a random number between two other numbers in micropython?
the random module isn't included and the only options give you bytes
open dock
give me a sec. i'm more versed in CircuitPython than uPython...
hallow igloo
Aight
open dock
@hallow igloo do you have the micropython-lib installed? looks like there is a random module available, that includes random.randrange(start, stop=) funciton.
https://github.com/micropython/micropython-lib
open dock
doh. my bad, i seemed to have skimmed over this note:
Note that the main target of micropython-lib is a "Unix" port
ah
open dock
i think the uPy API docs are somewhat out of date. there is a urandom module in the repo, which also includes randrange. haven't checked if its included in the ESP8266 port, but you could try this:
import urandom
print(urandom.randrange(0, 10))
and, appears to be turned on for the 8266...
#define MICROPY_PY_URANDOM (1)
what does dir(urandom) print out?
hallow igloo
['__class__', '__name__', 'getrandbits', 'seed']
open dock
are you using the latest version?
hallow igloo
yes
open dock
π€
open dock
π you're welcome. looking at urandom again, it looks like there's an extra conditional that include/excludes randrange. which i assume excludes it on the ESP8266. π¦
tulip comet
if i'm understanding correctly, getrandbits should be able to generate a random number with a given amount of bits. you could write your own randrange function. i think you could get the difference between the two input numbers and figure out how many bits that number uses (i'm not sure if int.bit_length is available on micropython but it should still be quite easy to do yourself if necessary). then, using getrandbits, generate a random number with that amount of bits. then you could use modulo to clamp it within range or keep generating until it is in range if you're looking for a more uniform distribution. i'm not sure if i explained that well so have an example instead:
say i want a random number between 5 and 14. the difference is 8 (if we're going in terms of randrange), which occupies 4 bits (0b1000) so if i generate a number with 4 bits using getrandbits i can get a random number up to 0b1111 or 15. you could then do that number % 8 to keep it within the difference, or generate another random number until you get one below your difference 8 for a better uniform distribution. then, add this random number onto your minimum number (in this case, 5) and you've got yourself a random number in the range you wanted.
maybe that's obvious and i didn't need to explain it at all, i don't know. i'm tired :D
tulip comet
i wish i did
tulip comet
hey i'm just forcing my sleep schedule back to normal, holidays end soon. also, offtopic. 
long orbit
π
tulip comet
oh neat :D
patent barn
@tulip comet credits of what?
hallow igloo
Has anyone installed asyncpg on raspbian before
lean valve
@hallow igloo I have not, but I have a raspi on raspbian at home, which I can check it against if you are running into a problem
stuck thicket
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hallow igloo
I got PostgreSQL on my PC with my database and i've got my python discord bot on my raspberry pi. When I try run the bot it wont connect to my database
lean valve
can you ping your PC from the Pi, and is it firewalled off on the PC?
hallow igloo
?
languid hill
there are multiple things that can get in the way of connecting to a remote database:
- improper network settings that make it so you cant route packets to the server
- firewall settings blocking the ports
- improper db config that causes it to not be listening on the network (eg maybe its only listening for processes on the db server itself)
- permissions on the db server blocking access from your machine
- username/password is wrong
- your software's connection information like IP/port/protocol is wrong
- your code is not correctly using the postgres library
etc
@hallow igloo you should check all of those above things
hallow igloo
i created a dump file
i cant seem to get pg_restore to work on my pi
im moving my databse to my pi btw
How effective would it be to be to make a Discord bot with Python and then just have it running on a Raspberry Pi so I don't have to constantly have my pc running?
once i get my database working ill let u know
im trying to move my database to my pi
so ill be running my bot and db on my pi
lean valve
@hallow igloo That would work fine
hallow igloo
Okay thanks!! π
tawny fiber
so ive looked slightly into circuitpython and I got a question. Why is it designed to actually still parse etc. the .py files instead of the user just compiling it down into a .pyc and then copying it over. Wouldnt that reduce the memory and/or flash required for the circuitpython binary (and the python script) making it easier to build bigger scripts?
open dock
@tawny fiber that is available, using the mpy-cross tool which converts files down into bytecode and gives them a .mpy extension. you can also freeze libraries in if you compile the firmware yourself, which will do the above.
tawny fiber
alright cool!
open dock
on the smaller capacity boards (M0), having your code in a .mpy, and then just importing it inside main.py/code.py is often the only way once you start running into memory errors. on the M4 boards...haven't seen anyone hit that limit. yet. π
halcyon iron
anyone knows where can i start learning about raspberry pi
lean valve
@halcyon iron You can start here for the documentation https://www.raspberrypi.org/documentation/
We can answer questions here as well
halcyon iron
oki doci thanks @lean valve π
stuck thicket
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stuck thicket
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peak bridge
Hey, was wondering if anyone is good at Arduinos? Iβm having trouble setting up my Ultrasonic sensor and buzzer to stop/play. What I have working currently is the ultrasonic sensor(it displays in cm the distance in serial port) and the buzzer(works when it reaches required distance). What I cannot get to work is stopping the music after it gets removed from the required distance. I have it so if they have their hand < 6 cm then it will play the song but I cannot figure out how to stop at > 6 because after the song starts to play, it doesnβt read distance to console anymore.
languid hill
you might set up an interrupt on a timer right before you start the music @peak bridge. keep the code in this interrupt super short so you cant hear the music pause and use it to check the sensors status
stuck thicket
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opal mason
I always watch these back, but they're not in the right timezone for me, unfortunately
past epoch
is that the normal start time?
opal mason
It's usually somewhere between midnight and 2 am for me, as far as I can tell
Not surprising given the timezone they are in, though, so it's totally understandable.
peak bridge
Hello, Iβm having a trouble with my ultrasonic sensor and my buzzer. Iβm unable to stop the buzzer from playing a song mid song. I need help. I can share the code in a second
Thanks to anyone who will helpZ
.
rain pine
I got a PYNQ FPGA board, which has been awesome. It's plugged into my laptop with ethernet. I'd like it to be able to download packages. I saw that I'll have to Bridge my connection in order to do that, but I'd lose internet access on my laptop unless I "have a third network adapter that is also connected to the network or a static IP address ." Not sure how to do that last thing. Trying to follow this: https://www.windowscentral.com/how-set-and-manage-network-bridge-connection-windows-10
open dock
@peak bridge from looking at your code, the reason it won't stop "mid song" is because playmusic() is blocking code. once it is called, it won't exit the function until it has completed the for loop by iterating over the entire melody array. one approach to solve this is simply to move the iteration control outside of that function, and into your main loop(). i threw this together, which should work; though it may need some tweaking. https://paste.pythondiscord.com/enurozapav.py
peak bridge
Thank you so much @open dock I will try this.
open dock
yw. hope it works! π€
hallow igloo
So, I'm trying to host a webserver on a Raspberry pi. Anyone have any good tutorials to get started?
lean valve
That is not really Raspberry Pi specific, so you can use any tutorial for hosting a web server on Debian or Ubuntu (assuming you're using Raspbian)
bronze wasp
Does any one know anything about pymavlink?
lean valve
No, but I fly and that looks really interesting
finite furnace
Does anyone know if this SunFounder L293D Motor Drive Shield For Arduino Duemilanove Mega UNO R3 AVR ATMEL could be used to control three motors at a time?
Using a raspberry pi
finite furnace
DC brushed motor
past epoch
oh.. an arduino shield on an rpi?
finite furnace
I think it works
past epoch
you can run 4 dc motors on that shield
finite furnace
Otherwise would this be better: SB New DC and Stepper Motorshield for Raspberry Pi 3 and Raspberry Pi Zero this expansion board can control up to 4 DC motors or 2 Stepper Motor, 2 IR sensors and a single ultrasonic sensor.
past epoch
I cant say that using an arduino shield would work on an rpi, I feel like it would not.
im sure that later board cannot control 4 DC motors and two stepper motors,
think it would be able to do one or the other
past epoch
I would go for the later suggestion then
finite furnace
Ok thanks
finite furnace
Does anyone have a recommendation for a quite cheap waterproof motor which is quite powerful- could be used in a boat? It would ideally also have a propellor.
heady crescent
you could always drive the propeller with a belt and not have to submerge the motor itself
(i have no recommendations though, just that thought)
hallow igloo
Is it worth buying a raspberry pi?
little gazelle
Highly depends on the plan you are having of course.
willow kernel
If nothing else it's a fun tinkering around tool
And you might end up finding a good project to do with it
finite furnace
I think a raspberry pi is a great buy if you are looking for another computer to play around with or do projects...
lyric oyster
i do have another question. is it possible to connect two grounds to my circuit? if i do it like this (foto below) my rpi crashes
languid hill
at what point does it crash? when you start the motor?
also 6 AAA batteries is 6v not 5, which could cause issues.
lyric oyster
when i plug the ground of the batteries it crashes
i watched a tutorial. there it worked with the battery but yeah maybe you are right
languid hill
do you have another power source then?
because for it to crash it has to be already running
right now you have the + AND - of the batteries connected to the pi
if the pi ALSO has another power source then yes that will cause issues
you need to keep their + separated
@lyric oyster tagging you since i think its been a while since you posted last
lyric oyster
sounds fair :D its already late here. i will try it tomorrow but thanks for your help!
sturdy ridge
@languid hill @lyric oyster for reference, Arduinos have an on board voltage regulator which you should be providing a minimum 7V, probably closer to 8-9 V
Oh that's a pi lmao nvm
The best way to power is pi is almost certainly a portable power bank
You really shouldn't be using AA batteries for powering pis
They don't provide constant voltages, they have a wildly varying voltage sag curve as they discharge
This means you'll eventually get brownouts even if at some point you're putting in the perfectly in-spec input voltage
Unless you're using a 5V switching converter
But as I said, just use a power bank, it's easier
lyric oyster
the batteries are for the motors. not the pi. the pi is powered by a 5v adapter
sturdy ridge
Ah motors are far less sensitive to voltage choice, should be fine
I'd help debug but I refuse to read wiring diagrams
lyric oyster
π
sturdy ridge
Bring me a schematic and I'll help
lyric oyster
i am already in bed but thanks!
and the batteries are just for testing purposes. later on i will use an accu which needs to power 3 6v motors
languid hill
yeah if you have a 5v supply for the pi and a 6v supply for the motors, then connecting their + AND - will result in issues
just connect the -
lyric oyster
tbh that sounds logical. i should have fixed that myself. thanks so much
stuck thicket
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bronze wasp
@lean valve Yeah if you get that and pair it with a pixhawk you can do a lot
But pymavlink is so hard to work with
I was looking at their source code and they have a lot of ```
try:
code()
except Exception as e:
pass
Which means when it doesn't work you don't get any errors and it's very annyoing to debug
I am working on a fork that fixes this issue
lean valve
Seen this article before? https://realpython.com/the-most-diabolical-python-antipattern/
I like to link it to people who do that
bronze wasp
Yeah
I usally link poeple this video
I haven't seen that before, but I've seen a lot of anti-patterns articles before
tawny fiber
I showed that one to my mom once (she's been working on a huge C codebase from the late 80s since the 90s) and she was nodding in full agreement on every antipattern, always coming up with examples from her work
I think this was the first yt video she thought was worthy enough to show her friends
lean valve
But why is it presented as part of the Guy Talking In Car genre of youtube video
extremely weird choice imo
bronze wasp
The guy is troll, but still manages to get his message across
humble kraken
connect one side of all of them to ground
connect their other sides to different IO lines
you can have the resistor in the ground line
tidal wedge
Is there a diagram to follow? I'm not very sure about how to do that
patent barn
I don't know if this is the right place... Right now my LCD 5" screen has a power button at the back.
This is very annoying, so I am trying to get the software to do this for me
Its just getting power from the GPIO pins. So how do I shut them all down, and turn them back on>
tidal wedge
@humble kraken
humble kraken
@tidal wedge https://i.imgur.com/lsV8VuD.png
humble kraken
i didnt draw a breadboard because that would be too much work
tidal wedge
yh its just hard to understand completely cos im not too familiarr with hardware
humble kraken
have all the button resistors go to the ground rail at the bottom of the board
same as the leds
wait
oh they're wired as pullup
connect the 3v3 pin to the red rail on the breadboard
then connect all the resistors to the red (power) rail
humble kraken
@tidal wedge https://www.youtube.com/watch?v=Bqk6M_XdIC0
stuck thicket
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stuck thicket
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tidal wedge
@humble kraken do i connect the male to female connector next to the switch?
humble kraken
i have no idea how that's supposed to happen S:
@tidal wedge although sd card corruption seems to be a very common issue on Pis in general
shorting a pin or a similar hardware issue and somehow corrupting bits on a sd card don't really seem relatable though. Lots of worse stuff should be happening before those two events are directly related
lean valve
A new episode of Podcast.__init__ just came out, focusing on CircuitPython!
Nice work @long orbit , I'm gonna go listen to it now on my walk
opaque compass
Ive got a really weird question. I want to program an ai to learn fingerprint security and such mainly because i just want a project to do over the summer. I am curious if there is a simple cheap fingerprint reader for pc or if there is a way for my old ipadβs fingerprint reader information to be sent to my pc
Essentially using the ipad as a fingerprint reader
sturdy ridge
nope cant use ipad
there's probably cheap fingerprint readers. have you tried looking?
opaque compass
Yes but ive found some interesting results
Ill just buy one online since the ipad doesnβt work
Ty sir
long orbit
Thanks @lean valve ! I hope it turned out ok. I haven't had a chance to listen yet.
vague crane
So we could have had CircuitPerl π
lean valve
π¬
steel aurora
oh, sweet! can't wait to listen to the dulcet tones of @long orbit
added to my list for tomorrow
long orbit
π
jade orchid
Nice podcast. I properly discovered the circuitpython specificities. I recently build a project with micropython without even giving circuitpython a proper look. I'll stick to micropython for now (I' come from embeded c programming and use esp board I already had) but it's nice to know a more beginner friendly option to recommand around.
steel aurora
great podcast
long orbit
Thanks @steel aurora ! @jade orchid Iβm glad you are liking micropython!
steel aurora
oh hey I'm mister shirt look at me
stuck thicket
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opal mason
"We want the tree to be able to fire off tacos in any direction" π
Oh, cool, CircuitPython day at 8-8-2019
We should do something with that here as well
sturdy ridge
@vocal cipher 
vocal cipher
yes
I am only asking to see if i found channel that has members who can help me with the things confusing me in future @sturdy ridge
sturdy ridge
if it's not Python related, people here probably cant help large amounts. there's always discords like Electronicity, Discord Electronics Server and the Adafruit discord servers if it's less python related or the Electrical engineeing server if it's less arduino/hobbyist stuff
main tiger
I am designing a custom ATSAMD51 M4 PCB and plan to program in CircuitPython. My hardware question is: Does my design need an external FLASH IC for the UF2 Bootloader feature to operate correctly?
sturdy ridge
I havent loaded custom bootloaders before but I dont see why you'd need it. seems to be the process is simply bossa flash the bootloader
main tiger
So if a new ATSAMD51 M4 was plugged in and no external flash was present the bootdrive that would show up in windows would be the internal FLASH on the new ATSAMD51 ?
open dock
@main tiger it doesn't need an external flash, no. it would be similar to the "non Express" SAMD21 versions. like the gemma: https://github.com/adafruit/circuitpython/blob/master/ports/atmel-samd/boards/gemma_m0/mpconfigboard.mk#L7
main tiger
Perfect, I am trying to keep my chip count down.
silver surge
Just put my atom package on GitHub for Adafruit devices using CircuitPython in Atom https://github.com/jos-b/atom-circuitpython
lean valve
Nicely done.
silver surge
ok after some help from the folks in adafruit with some stability enhancements a version is available on the APM
hallow igloo
Hey there, could someone help me? I used micro python with ESP8266 board. How do i use urequest module and what is the difference between it and urllib.request that exist in normal python? I couldn't find sources at Google because it's really specific
So i could get bytes HTML data from a link.
jade orchid
@hallow igloo The u* in urequest indicates library specificly writen for micropython. Also be aware that they sometimes implement only a portion of the standard equivalent library. You should prefer u* lib as possible as they are implemented with the microcontroller constraint. You can have a look at https://github.com/micropython/micropython-lib/tree/master/urequests for urequest, there is a small exemple.
hallow igloo
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "urequests.py", line 106, in get
File "urequests.py", line 56, in request
OSError: -2```@jade orchid this popped up
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stuck thicket
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median summit
is there a way to send gps data from say an android to a RPI?
open dock
i would imagine its possible using WiFi or Bluetooth...
though, you may have to write the actual Android app if one isn't available...
tulip comet
or use a web app running on the pi that you connect to on an android browser
patent barn
You can actually get sim support for a rpi.
I was thinking of implementing something this way
blazing granite
Is it possible to power an arduino uno with a wall outlet? Using a step down transformer and a voltage regulator of couse.
vague crane
Via the DC jack or the input pin itself?
blazing granite
The Vin pin
robust portal
The Arduino uses DC and wall outlets give AC so you'd need a rectifier too but yeah it will work
plucky shard
@main tiger (a few days later) yes, you can make a SAMD51 build using part of the internal flash for CIRCUITPY. Examples that already do this are ports/atmel-samd/boards/sam32 (using a SAMD51J20A) and boards/kicksat-sprite (SAMD51G19A
tawny fiber
@open dock if I was to build some board using circuitpython myself which has to interact with two or three sensors at the same time (namely a bme280, some EEPROM and some LORA radio, maybe a RFM69 or something like that), what MCU would you recommend to me? (considering that I imagine such a program in circuitpython taking quite some Flash memory away, especially size wise)
open dock
the SAMD51s are the most capable right now. with an external SPI Flash, you should have plenty of RAM to load all of those libraries.
though, EEPROM will have to be a hand-rolled library. though you could also work in a C-side driver..
tawny fiber
Alright, Ill look into both of that then thanks π
open dock
yw! i'll keep an eye out...i expect good things. π
tawny fiber
eh it depends on the guy I know who would do the actual hardware side
sturdy ridge
Now put it on a single PCB and use it as a Business card
hybrid sage
i'm trying to recreate this C code in python and i'm struggling, does anyone know of some good examples of i2c code in python? https://github.com/botbench/robotcdriversuite/blob/master/include/mindsensors-irdist.h
lean valve
Looks like CircuitPython has also been featured in the 5/30 edition of Python Bytes, congrats again to those dudes
night dust
It looks like your main loop will hang until GPIO 18 is pressed
Then hang until GPIO 23 is pressed
You probably don't want to have those while True loops there
sturdy ridge
Or use .sleep commands
night dust
Sleep is fine
It's a hacky way of debouncing, though
Ohh, yeah, don't use sleep in the main thread.
derp
opaque lily
Sounds good, i'll update it when I get home
opaque lily
So now I have this code (revised) the game works fine and now I'm still trying to get some input from my GPIO pins (left and right movement)
night dust
@opaque lily rather than poll the GPIO, you should set up an event to detect falling/rising edges and set an internal variable accordingly
As a bonus, you could add some print statements to the event handlers to debug your buttons.
opaque lily
So you're saying i should use
GPIO.add_event_detect(23, GPIO.FALLING, callback=my_callback2, bouncetime=300)
and
def my_callback2(channel):
print "falling edge detected on 23"
?
night dust
Something like that. I'd implement it as a class:
class Button:
def __init__(self, gpio_number):
self.__gpio_num = gpio_number
GPIO.setup(self.__gpio_num, GPIO.IN, pull_up_down=GPIO.PUD_UP)
self.__gpio_state = GPIO.input(self.__gpio_num)
self.__lock = Lock()
GPIO.add_event_detect(self.__gpio_num, GPIO.FALLING, callback=self.__on_falling_edge, bouncetime=300)
@property
def is_activated(self):
with self.__lock:
return not self.__gpio_state
def __on_rising_edge(self):
print("The button was released")
with self.__lock:
self.__gpio_state = True
def __on_falling_edge(self):
print("the button was pressed")
with self.__lock:
self.__gpio_state = False
Then you could replace your GPIO.setup calls with button_1 = Button(18)
And in your polling function just check if button_1.is_activated
Note: that code isn't tested, so don't expect it to work right away π
sturdy ridge
When you're dealing with stuff that should be "polling" all the time which disturbs other ongoing computation the answer for higher levelish work is generally async or something similar and for lower level stuff, it's interrupts
Interrupts are very very important to know
opaque lily
Hm, so what would i have to do to implement this into my own code? (Where to put it and should I change anything in the above code
(sorry not too fluent in python) thanks for the quick replies and help!
i tried putting the gpio_number as 18, but then i realized that i have two buttons, would I have two classes?
sturdy ridge
Two buttons = 2 instances of the same class
button1 = Button(18)
button2 = Button(19) or whatever
opaque lily
okay.. but then how would I put it into the code that seepho had provided though?
button1 = Button(18)
button2 = Button (23)
class Button:
def __init__(self, gpio_number):
self.__gpio_num = gpio_number
GPIO.setup(self.__gpio_num, GPIO.IN, pull_up_down=GPIO.PUD_UP)
self.__gpio_state = GPIO.input(self.__gpio_num)
self.__lock = Lock()
GPIO.add_event_detect(self.__gpio_num, GPIO.FALLING, callback=self.__on_falling_edge, bouncetime=300)
@property
def is_activated(self):
with self.__lock:
return not self.__gpio_state
def __on_rising_edge(self):
print("The button was released")
with self.__lock:
self.__gpio_state = True
def __on_falling_edge(self):
print("the button was pressed")
with self.__lock:
self.__gpio_state = False
Put the class near the top of the file -- just after your import statements
opaque lily
alright, where would i define the buttons and would i keep my original code there as well?
night dust
Define the buttons just before your mainloop. Naturally, the mainloop will need to change to reference the newly defined buttons
opaque lily
So after all this, I have this code here: https://pastebin.com/0XuBRzPv
what should I do at line 108 since I have the class up there now
opaque lily
also, how would i set it so that button 1 (pin 18) and button 2 (pin 23) can go left and right in this class? (23 being the left and 18 being the right
opaque lily
OKay, so I changed it back
this is my code, it's a pygame where i use gpio buttons 18 and 23 to go right/left
unkempt wedge
Hi all!
I'm writing a simple micropython script for my esp32.
It's a simple http server and it's working fine. I would to control some smartlighting with this.
But how can I recognize query strings to use with commands?
response = """<h1>Hello World!</h1>"""
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('', 80))
s.listen(5)
while True:
conn, addr = s.accept()
print('Got a connection from %s' % str(addr))
request = conn.recv(2048)
request = str(request)
print('Content = %s' % request)
conn.send('HTTP/1.1 200 OK\n')
conn.send('Content-Type: text/html\n')
conn.send('Connection: close\n\n')
conn.sendall(response)
conn.close()```
I.E.:
192.168.31.182/?led=on
192.168.31.182/?led=offWE ARE LIVE! SHOW AND TELL! https://youtu.be/tmmjlA0e0BI
stuck thicket
10% off all items in stock code is EXCAMERA expires 6/5/19 @ 11:59pm ET #askanengineer https://youtu.be/D6ZJ8JeJiY4 & http://www.adafruit.com
jade orchid
Hi @unkempt wedge, I think it would be much simpler to not handle the bare connection yourself. I suggest to use a framework for that. A quick search I found https://github.com/jczic/MicroWebSrv that is for micropython. You then can create function for any endpoints you like. In your case something like %ip%/led/on %ip%/led/off ( or a single one %ip%/led/<status>).
past epoch
hallow igloo
ty
hallow igloo
any tutorials specifically for esp 8266 @past epoch
i only got a esp 8266, got nothing else lmao
past epoch
that you have to use C to write, you need specific boards to write python.
when it comes to the 8266 i think you need the Feather variant
hallow igloo
oh, so i need to use arduino
tawny fiber
alternatively you could just check out what adafruit wrote about how to exactly use circuitpython on an esp https://learn.adafruit.com/welcome-to-circuitpython/circuitpython-for-esp8266
however its no longer supported so that might not be your best approach
past epoch
adafruit keeps their site up to date. if you want a board to write python, i recommend curcuit python express
Circuit Playground Express
this is the correct name
hallow igloo
serial.serialutil.SerialException: could not open port 'COM1': FileNotFoundError(2, 'The system cannot find the file specified.', None, 2)
serial.serialutil.SerialException: could not open port 'COM1': FileNotFoundError(2, 'The system cannot find the file specified.', None, 2)```uh, help?
@past epoch any idea
tawny fiber
assuming your arduino / esp / whatever is connected, this might not be the correct port to communicate with it, try COM0 and if that doesnt work maybe open up the arduino IDE and check what it shows for available serial ports
hallow igloo
how do i do that?
tawny fiber
what part of that
hallow igloo
changing the port to com0
tawny fiber
well for that we would have to know what you are even doing
hallow igloo
i got my esp connected, and im trying to run a example on arduino
its the "blink" example
tawny fiber
how exactly are you doing that
tawny fiber
in the arduino IDE I assume?
tawny fiber
can you click on the tools button
and scroll down to an option which should be named port (i got mine in german so idk exactly)
tawny fiber
yeah go down to port
tawny fiber
π
hallow igloo
anything interesting i can do with these?
SATA OPTICAL DRIVE CONNECTOR BOARD
1gb ram
Mini PCIe mPCIe Notebook Wifi Wlan Card
a fan```I mean you could build some wifi connected HD or something like that with lots of effort
hallow igloo
@tawny fiber do u know how to make a bitcoin mining rig
i wanna make one for fun, i got a spare cpu
tawny fiber
thats not profitable at all anymore
hallow igloo
ik but i wanna make it for fun
tawny fiber
a cpu is just a piece of electronic which can do arithmetic operations, it doesnt have any storage and barely any memory itself
hallow igloo
yah
i got a cpu and
SATA OPTICAL DRIVE CONNECTOR BOARD
1gb ram
Mini PCIe mPCIe Notebook Wifi Wlan Card
a fan
tawny fiber
well i guess you could make something up with that if you had a whole motherboard
signal nova
is it possible to use raspberry pi for motor control(induction motor and vector control)?
tawny fiber
should definitely be possible yes
sturdy ridge
GΓ©nΓ©rally the proper way to control an induction motor is a variable frequency drive because there's a lot of work to be done in controlling induction motors wrt controlling high voltages and input frequencies
You'll have to figure out how to interface the VFD with the pi
I don't have too much experience with dealing with VFDs other than what I've done with my courses so I can't give much more insight than that
uncut flower
Hi guys!
Gotta question for wiring this terrarium up.
Would an Arduino be a good choice to control both the light fixtures and the fan in this diagram?
Well, control and power
blissful kayak
for power yes but you need relay
for control yes, I guess fan is just on/of? And are there any special lighting modes for light
uncut flower
Ahh, gotcha.
And no special modes. I'm thinking of maaaybe adding some speed settings depending on heat?
Also a humidity sensor so I can get reports on humidity inside the terrarium.
uncut flower
The only thing I want for the lighting is a timer for it, along with sensor reports.
blissful kayak
yup arduino will have no problem with that
For good timer you may want to use some outside clock module, but I guess default is good too
uncut flower
I should compare prices too.
Would a pi-zero also work good?
blissful kayak
ah that would be kinda an overkill
you can get cheap arduino from ebay for like 2$
it's basically just a chip on board
arduino nano
uncut flower
Oooh, gotcha.
That sounds a lot better. I'm aiming for cheaper options.
That still work well, ofc.
blissful kayak
will take like a month to ship tho
uncut flower
But yeah.
That's no issue. I can buy and in the meantime I can build up the terrarium.
Since it hasn't been made yet
blissful kayak
just make sure you have data connector ready since it's using format you probably don't have layint at home and most of them doesn't ship with it
you can find bundle with cable for like <5$
uncut flower
Oh cool! I'll check it out, yeah.
Thanks a lot BD!
marble swan
Anyone got experience with Sim868 or any Sim8xx model?
main depot
Any one know if any good resources or tutorials for programming rgb strips using a rasp pi?
jade orchid
@main depot my first bet would be : https://learn.adafruit.com/adafruit-neopixel-uberguide/python-circuitpython
main depot
@jade orchid Thank you! I'll dig in to that.
surreal moat
How alike is Lego Mindstorm to the things you do here?
I have recently become interested in robotics and such
the little experience I have in it as of now is only Lego Mindstorm, which I personally got very bored of quickly
so I'm just wondering how big the difference is between Adafruit related things and Lego Mindstorm
stuck thicket
WE ARE LIVE! SHOW AND TELL! https://youtu.be/JrIJrWFWtmE
stuck thicket
10% off all items in stock code is GPSUSB expires 6/12/19 @ 11:59pm ET #askanengineer https://youtu.be/mlFJr_6fiO0 & http://www.adafruit.com
eager agate
what microconntrols works with mpython?
open dock
@eager agate i don't keep up with partial/full support, but the supported boards that i know of are:
- MicroPython's in-house boards: pyboard & pyboard D-series
- ESP8266
- ESP32
- WiPy & CC3200
- micro:bit
- nrf52840
- Teensy (don't know which version)
eager agate
how about a kid freindly python microcontroller?
languid hill
how young? if you just want an all in one device suitable to someone that can handle a few wires you could try the https://www.adafruit.com/product/3333
it has a bunch of sensors and other fun things built in, so they dont have to actually learn soldering/breadboarding etc yet.
open dock
for micropython + kid friendly, i'd say the micro:bit. https://microbit.org/
for circuitpython, i'd agree with riff; a Circuit Playground Express is the way to go.
both are supported by MakeCode (block programming) as well, so no *Python necessary.
orrr...if you want block-based *Python, both are also supported by EduBlocks: https://edublocks.org/
eager agate
no, i want a 10 - 13 ('cause i am 10 = 13) years old python text (not block programming) microcontroller like arduino, but with python, and kid freidly
and also can i do stuff with the microbit like the arduino?
open dock
can i do stuff with the microbit like the arduino?
yep. https://microbit.org/ideas/projects/
quartz remnant
Working on a project of mine, thinking of getting some stuff for my RPi, any recommendations for display and/or buttons, preferably as cheap as possible (text-only works for me, and buttons is a minimum of 5)
blissful kayak
I think 16*2 LCD displays would be the cheapest
quartz remnant
For now it looks like I'll go for an adafruit LCD keypad kit, though I might get external buttons from pimoroni
The only problem I have is that I don't have soldering as option, which would make it a bad choice
quartz remnant
So what I'm asking here is:
What are cheap parts for a Pi 2b, that
- Don't require soldering
- Are easy to install on it with no hardware knowledge
A text display and 5 buttons is all I need
Yeah no I prefer hardware buttons and I dont even have $80
A 16*2 display seems good but I can't find one that doesn't require soldering or doesn't take long to install on it
night dust
Ahh, then a Hitachi LCD is right for you: https://www.sparkfun.com/products/255
I'd imagine you could find one with a header pre-soldered
quartz remnant
Do I just take it and put it on the pins or what
Again I have no hardware knowledge so this is all really confusing to me
night dust
Ahh, that would be a challenge, then.
The RPi touch display would work right out of the box; configuring this would require finding software to drive it.
quartz remnant
Hmm
I know the adafruit ones have python libraries
But I'm not sure if installation is as easy
night dust
All of these displays that I've seen use the common HD44780 controller, which has a python library: https://pypi.org/project/HD44780/
quartz remnant
https://kiwi-electronics.nl
This is where I'll be buying from, so if you can find anything, let me know
blissful kayak
ye and you can find some which come presoldered https://www.adafruit.com/product/1447
so if you have wires you can connect it
quartz remnant
Oh wait I'm making some mistakes here
I keep confusing the version
It's just a B+
night dust
Any RPi should be fine as long as you have 6 GPIO available.
night dust
General Purpose I/O. The RPI B+ has several:
quartz remnant
So I'm assuming if I get one of these boards I just have to put it into the pins it requires?
night dust
Pretty much. If you have a breadboard, male-to-female header wires, and one of those LCDs with the header pre-soldered you should be good to go once that Python library is configured.
quartz remnant
What's a breadboard and mtf header wires?
night dust
A breadboard is a tool used to easily prototype circuits: http://wiring.org.co/learning/tutorials/breadboard/
MTF jumper wires allows you to connect one end of the wire to your breadboard, and the other to your RPI:
https://www.adafruit.com/product/1953?gclid=EAIaIQobChMIj9uPu9zn4gIVCJ7ACh1hfAgsEAQYASABEgL2jfD_BwE
quartz remnant
This is gonna cost me even more isn't it
night dust
One thing worth noting: when you're mixing wires around like this you can easily make a mistake and fry some or all of your components. So be careful :3
quartz remnant
Oh god
night dust
Having said that, this is a great starter project for this kind of stuff
quartz remnant
I mean the software is difficult enough already
night dust
There are plenty of tutorials, and plenty of people here who can help.
quartz remnant
Especially since it needs to run real-time on a pi
blissful kayak
if you're strictly on budget you can get that stuff very cheaply on ebay, but you'll have to wait like 1 month
quartz remnant
Ouch
I was hoping to have the interface done by the end of this week ^^"
Looks like I'll have to wait a month either way; to get paid or to get it from eBay
blissful kayak
to get paid?
quartz remnant
Yup, gonna hear if I got the job tomorrow and if I did I can start next Monday, and get paid at the end of the month
sturdy ridge
Good luck!
quartz remnant
So one issue I'm seeing here is that breadboards seem pretty large whereas I'd hoped to keep it as small as possible... any ideas?
steady juniper
You can solder stuff to blank boards instead, (dunno the proper english term)
stuff like that https://www.mikrocontroller.net/attachment/141361/IMAG3755.jpg
should be available from every electronics/DIY shop
quartz remnant
again, unable to solder
steady juniper
oh, didn't see that
but yeah, a small breadboard is probably as compact as you can get without soldering
they come in all possible sizes
night dust
You can get smaller breadboards
quartz remnant
is it possible to get one that fits on top of the rpi?
I'd rather keep it as small as it is right now
night dust
What kind of mechanical assembly are you picturing? Realistically, you don't need a breadboard.
quartz remnant
I just want to add a small display and preferably some button inputs to my rpi
night dust
If you have female-to-female jumper wires you can connect directly from your RPi header to your LCD's header
night dust
Good π
quartz remnant
oof, $3 for the cheapest ones
I wish there was something like pcpartpicker for this that showed what you need and maybe how it'd fit together
Because I'm really having some trouble visualizing how it would look with what parts
Ideally it'd look like this but with a smaller LCD and some buttons
actually
that's a touch LCD
I just don't know how to deal with taking full control of a SPI device
Would this be worth it, compared to the other ones? I don't know how SPI works and it doesn't seem very well documented on spidev, so that's the only con I see right now
quartz remnant
so from what I've heard, Adafruit's ILI9488-compatible code should work for writing to the display, but I can't seem to find any details about the touchscreen, any ideas?
marble swan
iirc the pi will take control of the display and be pretty much what you call Plug and Play
especially with raspbian anyway
i am sure thats how it went for me when i attached a screen to the header
quartz remnant
got it
so then the only issue left is finding a cheap DAC because the builtin one is garbage
but I can't find one that goes somewhere other than where the screen already goes
and about the display I just want to make sure I can use it as a non-display screen since I want it to be under full control from python
lunar owl
What kind of microcontroller should I start with?
tawny fiber
(copying sommersoft's answer here)
- MicroPython's in-house boards: pyboard & pyboard D-series
- ESP8266
- ESP32
- WiPy & CC3200
- micro:bit
- nrf52840
- Teensy (don't know which version)
with the microbit according to him being one of the most kid friendly / easiest ones
lunar owl
What about pi?
tawny fiber
the pi isnt a micrcontroller
its a Cortex-A chip so its meant to run actual operating systems
however you can still do a lot of things with the Pi which you can do with a MCU
dense copper
I am new to this space. What is circuit python? Different from MuPython?
opal mason
CircuitPython is derivative of MircoPython with some changes that should make it easier to learn and use
It was developed by AdaFruit for AdaFruit boards, like the Circuit Playground Express
dense copper
Hm. Since we are talking of micro controllers ( and I am oldish), does it actually complie to assembly code or does the new crop of microcontrollers actually work on interpreters?
tawny fiber
the intrepreter of python is still a compiled c program which executes python code or bytecode
I dont know of any MCU CPU etc which actually just runs an interpeter
dense copper
Thanks Ves and Nix
lean valve
That Being Said,
You can still program all these microcontrollers in the old school way. For example even the shiniest Adafruit toy, the Circuit Playground Express, can be used as an Arduino. CircuitPython is optional.
hallow igloo
What voltage should i provide at a Wemos D1 R2 in the Vin pin? Is it 5 or 3.3 volts?
sturdy ridge
Easily googleable. It's 3.3 https://wiki.wemos.cc/products:d1:d1
hallow igloo
then how about the 5V output voltage?
sturdy ridge
I don't think it's a 5V output voltage as much as it is 5V input with a voltage regulator
eager agate
what's better than micro:bit?
tawny fiber
Define "better" in this context @eager agate
tawny fiber
I do know the meaning of better
But what do you think is better
Easier to program
Faster
More peripherals
More memory
Less power consumption
Etx
So what exactly do you mean with better, there are dozens of things which can make an MCU better or worse and a lot of them depend on your use case / point of view
So the question is what do you want in your alternative microcontroller that the microbit does not have
Sooo?
eager agate
@tawny fiber the micro:bit is easier to use
tawny fiber
than what
And you again didnt say what you want in your MCU that is "better" than the microbit that it doesn't have yet
Question mark
eager agate
idk anything you said im just a kid that likes my micro:bit
just shut it
anyway what do you think is the best and can you give a list pls
tawny fiber
If I have your definition of best or your use case yes I presumably easily come up with a list, as you're not giving me enough information however I can't answer your question
eager agate
in your opinion not mine
you choose
anything
what's your definition of bese?
best*
tawny fiber
Well in my opinion there is a best MCU or at least a group of MCUs for every usecase, for example an Arduino will hardly be useable to build a digital camera because of its small memory, you'd be better if with a raspberry pi or a higher class MCU like for example a more modern STM one
lean valve
you could join the code jam and perhaps win a pyportal, those use python and have touchscreens...
lean valve
If it's about microcontrollers/python then for sure!
lean valve
We include it in microcontrollers here, it's kind of on the edge of being something bigger
Also I really hate to have to ask this but aren't you too old for this camp?
lean valve
I'm really sorry but we have to boot you out
We follow the Discord rules and those say you have to be 13 just to use it.
eager agate
my father
tho
he ususes this and does not know i do
ik his pass lol
he teached me python
lean valve
That's good, and I hope he continues, but you can't be on Discord by yourself, sorry
lean valve
!tempban 568142562678800385 3y Underage user
hasty zealotBOT
:incoming_envelope: :ok_hand: banned @eager agate until Wed, 15 Jun 2022 00:49:21 GMT (Underage user).
marble swan
Is it possible to interface with any device?
I have a pcb looks like some controller is on it
But how do i interface with it? is it a case of soldering a serial device to it?
tawny fiber
that highly depends on the device
there are a million protocls
can you maybe show us a close up picture of your particular device? often manufacturers write down what is tis there @marble swan
tawny fiber
is that a walkie talkie?
marble swan
naw a camera
radiant sparrow
@marble swan Are you Scottish?
marble swan
lol no
marble swan
i speak many forms of "broken english"
marble swan
So i was wondering
radiant sparrow
just thought i should throw that in
tawny fiber
I mean it is unlikely but there are certain ways to circumvent the need of programming a device
marble swan
But is it a chip that was programmed first then put on?
tawny fiber
so its definitely not a must have
anyways
im trying to figure out what CH in this context might stand for
it might be the company
whats the name/model of the camera?
tawny fiber
looks like there is a wifi camera called md81
marble swan
Yeah has a wifi controller too
There is something referencing TX there
which if i am right there should be a RX too
transmit and receive
tawny fiber
that might also just be a test point for anything on the chip
can you maybe swap it over and show us the back too?
marble swan
the back contains the wifi controller and an sd card reader
tawny fiber
I mean chances are high this is chinese MCU xxxxxxx and we'll never identify it but we can try
are there any other tes points?
tawny fiber
two things
a) can you maybe try to rub this blue shade on the main controller away, maybe there is more intel hidden under it
b) if you happen to have an Arduino or whatever wire its rx up to the TX and check the serial monitor for some output
marble swan
tawny fiber
thats the flash memory
aka where the program is stored
or at least there is a chip from bright moon semiconductor which is an SPI flash memory., has this name and the fitting pin amount
tawny fiber
thats just usb soldering points we very likely dont really care about
can you try one (or even both of the things) i listed above?
marble swan
I was just wondering if they disabled the usb ability to interface via HID or something(sorry don't know the terminology)
I have a soldering kit coming tomorrow
I will try to work out how to get the tx to the gpio of the raspberry pi
tawny fiber
just connect a wire to it
like literally put one end of the wire to the rx of the RPI, the other at the tip of the TX test pad and check if you receive something
tawny fiber
yeah minicom should be just fine
just pick some baud rate like 9600 and if you see anything youre good (if its weird shit change the baudrate to other commonr ates)
tawny fiber
yeah
just do the minicom thing
and after that we're gonna dump the SPI flash to see what its got
marble swan
i am a bit wet behind the ears with electronics
Will i also need to put to the GND as well as RX?
Don't want to fry the poor pi
tawny fiber
2 uarts?
marble swan
ttyS0 and ttyAMA0 the latter is bluetooth
tawny fiber
do the SO one
marble swan
Yeah i thought that might be the one
thx
last question π
Do i have to be specific with the gauge of wire?
Because i have some old USB cables
marble swan
i mean cut a wire from it?
tawny fiber
something like thsi would be better
marble swan
Ok i'l have a look where i can get it
I am super interested in this
The thing doesn't function properly
But i imagine its software related
Because its supposed to be able to search for wireless ap
tawny fiber
i mean i doubtw e can fix this
marble swan
Ah im not really bothered about that it was only $8
Just interested in what its actually doing
It puts out its own wireless AP to connect to though
and then you can view the cam from that
But its a bit gimmicky since its not password protected
So anyone can connect
cheap Chinese junk
tawny fiber
yup
so get the wire and see what we can read from the TX pin
and if that doesnt give us enough intel yet we're gonna tackle the SPI flash
marble swan
What data are we even looking for?
tawny fiber
we still didnt identify the chip
so maybe it dumps some intel about itself on the tx pin
or whatever
marble swan
Ok i'll have to figure out how to get minicom to dump to a file
marble swan
Yeah ok
It looks like some of the chips have been scrubbed out of info by a marker pen or something
interesting
Maybe i'll ty some alcohol on them to remove it
tawny fiber
yeah i already mentioned that around half an hour ago :p
marble swan
oh yeah sorry
tawny fiber
dont worry
tawny fiber
found anything under the marker pen? @marble swan
marble swan
Not yet family stuff in the way π
tawny fiber
k, just hmu once you got something then ^^
marble swan
iirc ^ that is the chip with the blue mark
tawny fiber
nah it was the bigger MCU
https://cdn.discordapp.com/attachments/545603026732318730/589893947929657360/Sun_Jun_16_20-07-34.jpg
this one
marble swan
ah
tawny fiber
anyways, you wont get around checking the SPI flash and the tx pinow
tawny fiber
Can someone tell me what a so called "series 25" SPI EEPROM is? Ive stumbled upon this term in a library but cant seem to find anything on google
sturdy ridge
From the sounds of it, external EEPROM that you talk to through SPI. Series 25 is probably specific to the manufacturer/brand used
tawny fiber
yes, should be fine
tawny fiber
right
so
at this point I dont really see much more than dumping the content of this SPI Flash from the other day
marble swan
Ok when you got time please explain how i will do that
I think the pi has the ability for SPI
tawny fiber
it does
marble swan
Oh boy so i have to desolder the chip
tawny fiber
I mean you could also attach the 6 wires we need
marble swan
interesting
tawny fiber
either way we'll need the voltage + GND and the 4 connections for SPI
marble swan
I did look at the data sheet for the flash chip
details the pin out
Must i solder the wires to the chip?
tawny fiber
you have to connect them
marble swan
Yeah silly question i guess π
I have a strip of wires like you pictured the other day
Does color coding matter?
I guess it doesn't
This sounds complex indeed
I think i read the chip has speed of 414mb
Or is that Mhz
idk am very new to this
tawny fiber
it doesnt matter yeah
and with a bit of luck its supported by some linux tool builtin
if its not we're gonna have a heard time reading from it
marble swan
EΓ3@Γ<PΓ·`PΒ<@Β ΓΌΓΏΓ AΒIΒ Β@ΒI ΒΒ HA AΒAΒAΒΒ Β@($@ $@ΒH A Β HΒ @ΒA$ ΒΒΒ$7sdram_init 1172a7--9c4 4 CAS:1--RFC:9--RP:2--RCD:2--DISIZE:0--AREFEN:1--SDCKHD:1--SDCKOE:1--SDRAMSIZE:3 SDRCON0:d72a7--2M init Β!?ΓΈ?ΓΎΓΓΒ Β Β@Β Β@ΒΒ Β@Β ΒΒ ΒΒΒΒΒΒ Β ΒΒΒ ΒΒΒΒ Β Β!Β
I tried again and got this
I believe that is 115200 buad
Tried 9600 too
tawny fiber
@marble swan any idea why there are so many corrupted characters
marble swan
Well..
I believe that data didn't come from the TX on the board
So i must of touched some of the other pins near by on the chips
OR that is the raspberry pi itself
Because i tried again carefully on the TX pin and got nothing
But i did solder the microphone back on.... Badly
Need much practise
I must have the + - mixed as there is interference
Or having bare wire is causing it idk
ancient harness
Oh
Hmmmm. Maybe it could be a (de)coupling problem or you need to have GND hooked up. I'm unsure.
marble swan
I just need to clean the solder I tried to reflow it and not use new solder.
Iβll get some flux and a copper wire that should work to clean it
stuck thicket
please fill this out, it's for more python on hardware, this time, from VS code. no personal info is needed to fill out...
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https://forms.office.com/Pages/ResponsePage.aspx?id=v4j5cvGGr0GRqy180BHbRx50AHoXr3BImxtzTGKK4edUMEJNUUFTUUdGRFhOVUg0N0RBN0paOFJBRy4u
sturdy ridge
I didn't even know the Vancouver office had interns
stuck thicket
turtle on: pygamer, pybadge, pyportal, and not-out-yet-smaller-version-of-pyportal
vague crane
Whoa, cool!
I hope thatβs the official branding for the new pyportal
Totally ready to preorder my NOYSVOPyPortal π
chilly tusk
I can't get my PyPortal to connect to my Windows 10
Anyone had the same issue?
It boots up properly and tells me to edit the secrets.py-file
but none of my USB's detects anything
I guess I need to download some driver?
Yeaaah.. Nothing happens nowhere
@stuck thicket , have you had this before?
"Press the reset button twice" don't work :(
chilly tusk
A lot of people end up using charge-only USB cables and it is very frustrating
That was it
chilly tusk
do people really use mu-editor? it looks so ugly
steel aurora
it's for beginners, mostly.
it does have really neat integration for microcontroller boards, but @silver surge recently wrote a plugin for atom that does the same thing so you can use that if you prefer
silver surge
please let me know of any install issues actually, some people are having issues with that
steel aurora
I know some members of this community were talking about doing the same for VSCode, Sublime Text and PyCharm too, but nothing that works yet. @chilly tusk
I'm sure we'll see it eventually, though.
chilly tusk
I mean Iβve never done anything with physical hardware before. I couldnβt get it working (red LED and not running the code.py file) I assume I need some dependencies or something, but it seems kinda hard to find information on how to just get started hehe
Iβll check your Atom plugin! Not that I really know what the integration is supposed to do, though π
Seems like red flash is not connected to WiFi, maybe it donβt like my 5G
steel aurora
@chilly tusk go find the pyportal guide on learn.adafruit.com
you'll wanna clean it and then flash it with the latest software.
kattni has a great howto though
that should get you running.
stuck thicket
@steel aurora looks like @chilly tusk was helped on our server (cable issue)
@chilly tusk mu is not "ugly" that's not nice π¦
tawny fiber
looks better than IDLE
steel aurora
@stuck thicket excellent. glad he found some help. :)
stuck thicket
WE ARE LIVE! SHOW AND TELL! https://youtu.be/PaFqToS2c6M
stuck thicket
WE ARE LIVE! ASK AN ENGINEER! https://youtu.be/21dOGryZ6Xo
chilly tusk
Thanks guys, I fell asleep yesterday.
Iβll look more into it on Saturday βΊοΈ
Is it possible to buy humid sensors to the PyPortal? How modular is it?
steel aurora
sure you can.
some sort of humidy sensor breakout board could be wired to the I2C. there are probably other ways to do it, too.
you could chain a whole bunch of sensors onto that, if you wanted.
something like this: https://www.adafruit.com/product/2652
here's a related project on learn.adafruit.com - a pyportal weather station https://learn.adafruit.com/pyportal-iot-weather-station/overview
it does exactly that
open dock
@tawny fiber moving here. ot is crowded.. π
open dock
what is on the other end of the UART? PC?
tawny fiber
a pi
im just wiring up my pi rx tx to the rx tx pins i found in the code for my chip in the micropython repo
marble swan
Iβm looking for a clip that will work with the pi
I assume most will
But some Iβve seen have all the crazy legacy ribbons
@tawny fiber i think you might know for reading flash rom
tawny fiber
i have no idea what a clip even is
marble swan
OK π
waxen zenith
Need help to write arduino or raspberry pi code to control 8 relays snd 2 pwd signals. Can pay for help.
tawny fiber
people here dont write code for you for money, we'll help you with a specific problem if you have one or provide resources though
open dock
@tawny fiber the micropython repo gets so foreign when i read it; we differ at some major points. π
another q though: could it be the UART settings? bits, parity, stop bit?
tawny fiber
I actually digged a bit into that and found the line of code where it sets them and i dont see an issue
tawny fiber
the second one
open dock
ok. i would try playing around with the bits setting first. i think the REPL thing was a red herring that my brain took off on...
tawny fiber
you mean the baud rate?
tawny fiber
i didnt even get so far to write any software for it
id test on the three builtin ones of my chip
also this line of code here shows all the settings
https://github.com/micropython/micropython/blob/master/ports/stm32/main.c#L507
open dock
ahh! so maybe i wasn't crazy. https://github.com/micropython/micropython/blob/master/ports/stm32/main.c#L509
tawny fiber
but that could also be an attachment to a normal repl couldnt it?
open dock
yeah. normal repl is default. raw repl is entered by sending ctrl-A
tawny fiber
right
now i gotta wire everything up again as i had already given up on this and planned to continue with normal debugging
open dock
@tawny fiber this might be of help: https://forum.micropython.org/viewtopic.php?t=3960
tawny fiber
yeah thats the second thing i was wonderin
how does one even execute python with micropython
like when I flash it my chip still comes up like normal on USB when i attach it to the STLINK interface
i cant put my script anywhere
open dock
it will look for main.py in the root folder, and run it automatically. boot.py, as mentioned in that forum thread, will run during...well, boot, before some things are setup.
tawny fiber
yeah im aware but i dont see a root folder ot put things in
open dock
oh. you don't get a mounted drive? /media/Nix/MICROPY (or whatever standard FAT label micropython uses..)
tawny fiber
Nah....I mean that might be the case becuase im just flashing it manually over openocd as nothing else is working but idk, never used this
open dock
there should be one mounted. it may need to be manually mounted. π€· other than that, its all REPL.
ampy used to be maintained by adafruit, but i think someone else took it over. you can transfer files without USB drive with it.
yep, taken over by pycampers: https://github.com/pycampers/ampy
tawny fiber
like I literally cant deploy this any builtin way for the openocd deploy I get
Warn : UNEXPECTED idcode: 0x6ba02477
Error: expected 1 of 1: 0x2ba01477
so i suspect im using a version its not thinking of
for st-flash I get an unknown flash type as it doesnt support the h7 yet iirc and this dfu thing i dont even know how to set up
do the deploy scripts do something a simple openocd "load" command wouldnt do?
open dock
i've never dealt with STs. does ST-Link/Flash work with GDB? that's how we do it, though primarily with J-Link...
tawny fiber
st-link works with gdb via openocd yeah
so ill just do my usual openocd procedure then....
open dock
ahh. ok.
i was Win10 only when i first got into circuitpython; openocd was a nogo, so i used Atmel Studio for the longest.
tawny fiber
i mean I can see that I flashed the firmware, i can debug it with my gdb after all buuuuut i dont see any file system what so ever coming up
open dock
does dmesg show the MSC getting established?
tawny fiber
so what I do get in my dmesg output is (HAH i was just fetching it ^^)
[136536.102470] usb 1-6: USB disconnect, device number 18
[136538.384166] usb 1-6: new full-speed USB device number 19 using xhci_hcd
[136538.512108] usb 1-6: New USB device found, idVendor=0483, idProduct=374b, bcdDevice= 1.00
[136538.512114] usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[136538.512117] usb 1-6: Product: STM32 STLink
[136538.512120] usb 1-6: Manufacturer: STMicroelectronics
[136538.512122] usb 1-6: SerialNumber: 066FFF545257717867114125
[136538.571612] usb-storage 1-6:1.1: USB Mass Storage device detected
[136538.571991] scsi host0: usb-storage 1-6:1.1
[136538.572595] cdc_acm 1-6:1.2: ttyACM0: USB ACM device
[136539.631711] scsi 0:0:0:0: Direct-Access MBED microcontroller 1.0 PQ: 0 ANSI: 2
[136539.632433] sd 0:0:0:0: Attached scsi generic sg0 type 0
[136539.632787] sd 0:0:0:0: [sda] 4168 512-byte logical blocks: (2.13 MB/2.04 MiB)
[136539.632960] sd 0:0:0:0: [sda] Write Protect is off
[136539.632963] sd 0:0:0:0: [sda] Mode Sense: 03 00 00 00
[136539.633119] sd 0:0:0:0: [sda] No Caching mode page found
[136539.633121] sd 0:0:0:0: [sda] Assuming drive cache: write through
[136539.646950] sd 0:0:0:0: [sda] Attached SCSI removable disk
but the SCSI is this weird disck by stm themselves which contains a readme + manual
open dock
hmm. wrong bootloader?
tawny fiber
uuuuh dont tell me you need a bootloader for this
open dock
now..i can't speak to need vs optional
tawny fiber
i mean it does say "STM32F4xx and STM32F7xx" but it also says that in the other readme as they got no real support for the in specfic h7 atm they say it "should be sconsiderd a faster F7 one for now"
i mean first things first i would be interested in which usb interface theyer even talking about
open dock
Re: Understanding the difference between bootloaders mboot and hw dfu
Post by dhylands Β» Thu Dec 20, 2018 2:57 pm
The factory bootloader has limitations, like it only works on FS USB and not HS USB.
You might also want to bootload over alternate interfaces depending on your HW architecture.
The built-in bootloader only supports writing to internal flash. Mboot supports writing to an external flash chip as well.
so maybe not needed. debugging...so much funs! π
tawny fiber
like i got the one to the ST-LINK and the power USB plug....and I assume that the one for the ST-Link is for the st-link only?
open dock
faster = 3.0SS vs 2.0HS? and yeah, i would assume its the user-facing USB, not the st-link one.
tawny fiber
however when I plug it in there it doesnt get pwer and nothing lights up
conclusoin find a second fitting usb cable
if i plug something into the user facing one the kernel doestn even recognize it according to dmesg
π
open dock
dev kits are wonky like this. on the nRF dev kits, we had to flash our bootloader to disable the on-board j-link, and allow our USB CDC to take over...
tawny fiber
but I want to get back to using Rust at some point too π im just doing this to check wether my Rust code or my chip are weird
open dock
these situations always seem like an easy "yeah, i'll verify with this". 6 weeks later...
tawny fiber
yeah i know!
this time its not even like a logic analyzer or whatever could help me because im working on something inside the chip
nix now: "embedded dev sucks"
nix when he fixed the problem an hour to 4 weeks like: "my brain fucking sucks"
tawny fiber
@open dock fixed my issue now, my peripheral clock for the ADC was too fast so the last three bits never got sampled π
open dock
always the clocks...bet never the first thing to think of. π
gladded you got it worked out though! π
left gyro
Nix, what kind of MCU are you using '? π
open dock
STM32H7, if i was reading correctly.
tawny fiber
@left gyro its an stm32h743zi (t6 revision y if youre *really interested :p)
left gyro
Thanks Nix. I googled. π Interesting device π
My work is based around an Atmel Chip based single board
Have much to learn about MCU's and Single Board devices. Learning little by little though.
(and it runs windows CE, due to certification standards and stuff)
tawny fiber
atmel chips can run windows?
left gyro
Sure π
with Microsoft now also making the Linux Subsystem available, the lines are also starting to blur heavily, if you have the spare memory that is.
Probably more single board computer, than MCU though
tawny fiber
what atmel chip are we tlaking about there?
open dock
i was going to guess a CortexA based chip... i've haven't even come across an ARM926. interesting.
tawny fiber
arm9 is heavily outdated isnt it?
left gyro
windows ce6
tawny fiber
no I mean the chip family itself
left gyro
Not as far as I know. This is a new product line
tawny fiber
Since ARM9 cores were released from 1998 to 2006, they are no longer recommended for new IC designs, instead ARM Cortex-A, ARM Cortex-M , ARM Cortex-R cores are preferred.
left gyro
Certification on these device, take months if not years sometimes
tawny fiber
cough
left gyro
They still make and sell them.
I should clarify. With devices, I mean our entire board. I work for an "OEM" for lack of a better description.
tawny fiber
I see
but still, looking at the datsheet its from around 2001-2003. you should at least consider moving on to cortex-a ones in the future
left gyro
Next gen sure. That will likely be in 10 years.
These are our "New" product line. π
tawny fiber
From when is your thing originally?
left gyro
Access control and security.
tawny fiber
No I mean year whise
left gyro
oh. This has been in development for 4 years i think
Im not a designer though. Just a firmware tester.
tawny fiber
Hm maybe arm didn't have windows capable cortex a's at that time
Not been long enough into programming to judge this :p
left gyro
When it comes to Banking and Military systems. Stuff moves SUPER SLOW
Usually because of Insurance company demands.
Getting stuff certified, takes forever and costs HUGE amounts π¦
Its not consumer electronics sadly.
tawny fiber
the job I'm getting in it security by the end of the year keeps getting more and more unattractive
open dock
not to mention...$10 non-wholesale per chip vs $51 non-wholesale per chip...
left gyro
Yup. a few cents even can make or break the uptake of a new system.
open dock
comparing against a cortex-A53
left gyro
The scale of manufacture makes its a big pain if you add even a few cents per board.
open dock
though, they are in totally different leagues.
tawny fiber
I got an email from the STM news letter (I unsubscribed 4 times from by now) today saying that they now have a 2 core h7....how does that even work, it's a MCU after all
left gyro
That sounds more SOC that MCU
I stand to be corrected though π
I moved from Software to firmware testing this year.
Different beast totally.
tawny fiber
What's the difference?
left gyro
he distinction between an MCU and an SoC is much less clear, and the two terms are often used interchangeably. However, in common usage, the term SoC typically refers to MCUs with a greater number of onboard peripherals and functionality.
To copy and paste from Google π
SOC. System on chip usually has video and audio and heavens knows what else. MCU is more basic IO.
tawny fiber
No no regarding your testing job
tawny fiber
I know what those are
left gyro
face palms
tawny fiber
:P
left gyro
Firmware involves the whole system, including testing the "OS" and whatever else is running on the device. with the software is normaly, more "user software"