Phyton Script with klipper macros | Mainsail | Page 1

grand parcel Dec 9, 2023, 8:25 PM

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How can i run a phyton script with a macro? Or if possible control a servo connected to the rpi with macros and without a phyton script.

grand parcel Dec 9, 2023, 9:34 PM

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So i basically have this script (example not final one)

import time

servoPIN = 17
GPIO.setmode(GPIO.BCM)
GPIO.setup(servoPIN, GPIO.OUT)

p = GPIO.PWM(servoPIN, 50) # GPIO 17 als PWM mit 50Hz
p.start(2.5) # Initialisierung
try:
  while True:
    p.ChangeDutyCycle(5)
    time.sleep(0.5)
    p.ChangeDutyCycle(7.5)
    time.sleep(0.5)
    p.ChangeDutyCycle(10)
    time.sleep(0.5)
    p.ChangeDutyCycle(12.5)
    time.sleep(0.5)
    p.ChangeDutyCycle(10)
    time.sleep(0.5)
    p.ChangeDutyCycle(7.5)
    time.sleep(0.5)
    p.ChangeDutyCycle(5)
    time.sleep(0.5)
    p.ChangeDutyCycle(2.5)
    time.sleep(0.5)
except KeyboardInterrupt:
  p.stop()
  GPIO.cleanup()```
and my question is where to save it and how to execute it (and what to adjust cause this is not written for klipper)

magic canyon Dec 9, 2023, 10:01 PM

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this thread has some information on controling GPIO pins with Klipper. https://www.reddit.com/r/klippers/comments/n1028z/executing_shell_or_python_scripts_by_klipper/

From the klippers community on Reddit

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vale thorn Dec 10, 2023, 5:57 AM

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Why not simple setup a Linux mcu and control the pin?

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https://www.klipper3d.org/RPi_microcontroller.html

grand parcel Dec 10, 2023, 6:35 PM

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vale thorn Why not simple setup a Linux mcu and control the pin?

would that also work for servos? Cause they only have one data pin

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and that data pin needs to send a pulse with a specific lenght

vale thorn Dec 10, 2023, 6:36 PM

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You should really start to read the Klipper documentation https://www.klipper3d.org/Config_Reference.html#servo

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Never tried it on a Linux mcu but should be easy to try out for you

grand parcel Dec 10, 2023, 7:39 PM

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I configured the servo in the printer config but i get this error

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pin: gpiochip0/gpio26
minimum_pulse_width: 0.0005
maximum_pulse_width: 0.0024```

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camera is just the name

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and then pulse width is from the datasheet

vale thorn Dec 10, 2023, 7:40 PM

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You missed the mcu name

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Have you setup the Linux mcu first

grand parcel Dec 10, 2023, 7:41 PM

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yes

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witht the makemenu

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and then make flash

vale thorn Dec 10, 2023, 7:42 PM

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And did you add it also in the printer.cfg

grand parcel Dec 10, 2023, 7:43 PM

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i dont think so let me look into that

vale thorn Dec 10, 2023, 7:43 PM

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See https://github.com/Klipper3d/klipper/blob/master/config/sample-raspberry-pi.cfg as examples

grand parcel Dec 10, 2023, 7:44 PM

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serial:  /dev/serial/by-path/platform-3f980000.usb-usb-0:1.3:1.0-port0
baud: 115200
restart_method: command

[mcu host]
serial: /tmp/klipper_host_mcu```
like this?

vale thorn Dec 10, 2023, 7:46 PM

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Yes

grand parcel Dec 10, 2023, 7:46 PM

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Okay starts with no errors

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ill go try if the servo works

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ignore this SET_SERVO SERVO=my_servo ANGLE=180

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nothing happens no idea why

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pin: host:gpiochip0/gpio26
minimum_pulse_width: 0.0005
maximum_pulse_width: 0.0024```

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command i sent SET_SERVO SERVO=camera ANGLE=100

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no errors

vale thorn Dec 10, 2023, 7:53 PM

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Maybe Klipper can not do it t the pi

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Or your 5V is not strong enough

grand parcel Dec 10, 2023, 7:54 PM

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thats probably it

vale thorn Dec 10, 2023, 7:54 PM

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Or you simple used the wrong io

grand parcel Dec 10, 2023, 7:54 PM

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a good psu is already ordered because i get the undervolted warning a lot

vale thorn Dec 10, 2023, 7:54 PM

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I would use a scope to measure it but you might not have one

grand parcel Dec 10, 2023, 7:55 PM

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i dont

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i guess thats the reason

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Datasheet says this Operating voltage: 4.8 V (~5V)

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ill wait for the power supply and then test

grand parcel Dec 10, 2023, 10:48 PM

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I tried to use my arduino for power and it still didnt work and no errors

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The data pin is a pwm0 but my rpi 3b doesnt have a normal pwm pin

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Maybe thats the issue idk?

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Ill try to debug tomorrow maybe i made a mistake when setting up the mcu or smth

grand parcel Dec 11, 2023, 12:16 PM

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just a basic led also doesnt work

vale thorn Dec 11, 2023, 12:28 PM

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Than you most likly use the wrong IO

grand parcel Dec 11, 2023, 3:04 PM

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Ill just try with a different pin later

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I only have pwm0 is that fine or do i have to do smth different

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Or pwm1

grand parcel Dec 12, 2023, 3:43 PM

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not even an led works

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white_pin: host:gpiochip0/gpio25```

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#

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line 25: "GPIO25" unused input active-high (gpioinfo)

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and the cpu usage on the mcu and host is the same so its set up correctly (i guess)

vale thorn Dec 12, 2023, 3:46 PM

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Pins used by Klipper are seen

grand parcel Dec 12, 2023, 3:47 PM

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but gpio 25 is unused

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but set as input

vale thorn Dec 12, 2023, 3:47 PM

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pin: rpi: gpio16
value:0```

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Change rpi with host

grand parcel Dec 12, 2023, 3:48 PM

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in printer.cfg?

vale thorn Dec 12, 2023, 3:49 PM

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You will not get an output as long gpioinfo does not show it

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Use my example, change the pin to host: gpio16

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Restart Klipper and verify gpioinfo

grand parcel Dec 12, 2023, 3:50 PM

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and gpio25?

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the led is in 25

vale thorn Dec 12, 2023, 3:50 PM

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Guy I provide you with an example that I know it is working

grand parcel Dec 12, 2023, 3:51 PM

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should i put it in printer.cfg or somewhere else

vale thorn Dec 12, 2023, 3:51 PM

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If that not working you might have missed the step with the group permission

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Sorry but what is so hard to understand?
Put

[output_pin lock_M106]
pin: host: gpio16
value:0```
In your printer.cfg. Do a firmware restart. SSH in your pi and run gpioinfo to check if that IO is now marked as Klipper

grand parcel Dec 12, 2023, 3:55 PM

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set to klipper and output

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and a switch shows up on the dashboard

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and if i plug in a led its lights up

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but not very bright (probably because of the psu)

vale thorn Dec 12, 2023, 4:18 PM

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What did gpioinfo tells you

grand parcel Dec 12, 2023, 4:20 PM

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line 16: "GPIO16" "klipper" output active-high [used]

vale thorn Dec 12, 2023, 4:21 PM

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So now test your led example remove the gpiochip

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That should work also

grand parcel Dec 12, 2023, 4:22 PM

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should i remove the output_pin part?

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vale thorn Dec 12, 2023, 4:24 PM

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You can use each pin only once

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We know it is working in general so remove my example completely

grand parcel Dec 12, 2023, 4:27 PM

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the led is still not changing

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its on all the time

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white_pin: host: gpio16```

vale thorn Dec 12, 2023, 4:56 PM

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Is the pin shown in gpioinfo

grand parcel Dec 12, 2023, 5:00 PM

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line 16: "GPIO16" "klipper" output active-high [used]

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yes

vale thorn Dec 12, 2023, 5:09 PM

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Good the rest is than your external hw

grand parcel Dec 12, 2023, 5:19 PM

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Ill just wait for the power supply maybe thats causing it

grand parcel Dec 13, 2023, 7:33 PM

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Alright the new power supply arrived and its still the same

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No matter what i change the led is on but not very bright

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And i cant turn it off

vale thorn Dec 13, 2023, 7:48 PM

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What kind of led do you use

grand parcel Dec 13, 2023, 9:41 PM

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These

vale thorn Dec 13, 2023, 9:53 PM

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lol how should that help me. I need a part number

grand parcel Dec 13, 2023, 9:59 PM

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http://funduino.de/DL/LEDweiss.pdf

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Thats the datasheet

grand parcel Dec 17, 2023, 1:23 PM

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Bump

vale thorn Dec 17, 2023, 1:31 PM

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Have you placed a serial resistor as a current limit?

grand parcel Dec 17, 2023, 3:50 PM

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white one is gpio16 and black is ground

vale thorn Dec 17, 2023, 4:32 PM

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What value?

grand parcel Dec 17, 2023, 8:13 PM

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Id say 10k ohms

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Yeah its 10k

vale thorn Dec 17, 2023, 8:22 PM

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No wonder why it is only glimmimg 3.3V/10k = 0.3mA

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The data sheet expects a forward current of 20mA

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But be aware you should not draw more that 16mA from a PI IO

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So 3.3V/16mA=> ~205 Ohm so something around 220 would be ok. A 0.25W type is ok as it will draw ~0.05W (U*U/R)

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And that is basic electrical knowledge and has nothing to do with 3d printing

grand parcel Dec 17, 2023, 9:09 PM

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But its on even when i turn the pin off

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And its still not very bright with a 200 ohm resistor

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I only have 200 and 330 ohm resistors and bigger/smaller ones but 200 is the closest i have

vale thorn Dec 18, 2023, 6:13 AM

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Honestly I have no idea what you did setup, you talk about a wrong PS and so one, I proof to you that the functionality of a klipper mcu controlling an GPIO is working.
The easist way to proof that is a multimeter that should show ~0V if the GPIO is off and around 3.3V if the IO is on. Also important that you did not enable the weak pullup of the IO

#Phyton Script with klipper macros