#Controller and rx binded but registers no input at all

1 messages · Page 1 of 1 (latest)

iron vortex
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So I just bound my ranger micro to my rp1 and both the lights on the rx and the software on the tx says they are connected. I don’t get any input at all from the controller so something must be wrong. The controller also seems to lose telemetry really easily when I get close to the rx.

stone topaz
iron vortex
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Analogue

stone topaz
# iron vortex Analogue

can you post a photo of the expressLRS Lua Script screen while tx and rx are bound/connected?

iron vortex
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Yes one sec

stone topaz
# iron vortex

can you post a photo of the receiver wiring to the FC and screenshots of the ports and receiver tabs please

iron vortex
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Sure

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I’m pretty sure I’ve wired it correctly rx to rx and vice versa. The soldering is not too good either but I think it’s fine

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Computer currently out of battery so I’ll try to get it charged quickly

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@stone topaz here it is. I’ve made sure the rx is wired to R2 and T2

stone topaz
iron vortex
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Ok

stone topaz
# iron vortex

isn't this an RP1? why is it flashed with an EP1 target?

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(though they can be interchangeable)

iron vortex
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Heard since it’s quite old that it comes stock with happymodel software

stone topaz
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Move the receiver into uart 3 please

iron vortex
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Like resolder?

stone topaz
iron vortex
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Problem is I’m not home where my solder stuff is

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Is there anything else we can check?

stone topaz
# iron vortex Is there anything else we can check?

on the receiver webUI, can you load the /hardware.html page and post screenshot of the section right after the banner please (doesn't need to be all the way down.. just the immediate section after the banner

iron vortex
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How do I load the page?

stone topaz
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with the receiver webUI up, just add /hardware.html to the url

iron vortex
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Ok

stone topaz
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e.g. 10.0.0.1/hardware.html

iron vortex
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Too bad I just turned off the drone so gotta wait a couple secs for the WiFi mode

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Now it just doesn’t wanna go into WiFi mode

stone topaz
iron vortex
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No

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Just keeps blinking

stone topaz
iron vortex
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Ok

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It keeps disconnecting and reconnecting even while sitting still

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As soon as I turn on rx WiFi it looses connection and the WiFi mode stops

stone topaz
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if wifi mode stops, that means the power is insufficient.. connect a lipo

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(but ensure there are no shorts, or the blue smoke will appear)

iron vortex
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Fully charged lipo is connected

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And no smoke

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No shorts

stone topaz
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how'd you get those screenshots earlier then?

iron vortex
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By powering the rx and waiting 30 secs. That has worked every time

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So imma try it again

stone topaz
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turn off your radio and reboot the receiver

iron vortex
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The radio is off and I’ve rebooted the receiver and now I’m waiting 30 secs for it to go into WiFi mode if it doesn’t find any tx to bind with

stone topaz
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not 30

iron vortex
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That’s what it came with, I haven’t flashed it or anything really

stone topaz
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so why are you waiting in 30?

iron vortex
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Ooooohh that might be the issue

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Feels like it’s been more then a minute now tho

stone topaz
iron vortex
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No

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Really weird

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Still blinking waiting for a tx

stone topaz
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you have the radio Off the whole time and rebooted the receiver once the TX was turned off?

iron vortex
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Yes exactly

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Imma try rebooting again just in case

stone topaz
iron vortex
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No not at all

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And no WiFi has come up

stone topaz
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I'd suggest reflashing the receiver via betaflight passthrough, to latest firmware versions

iron vortex
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How would I do that?

iron vortex
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Wait now I think it changed its pattern. It going blink blink blinkblink so two normal blinks and then two short ones. But still no WiFi

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Imma try to flash it

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@stone topaz how do I know what packet rate I have?

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When choosing preset

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It says 250 in my tx so imma go with that

iron vortex
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Sorry for taking so long, but now I tried to flash and got this error message. I configured the fc according to your link and tried to flash.

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@stone topaz

stone topaz
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(could be the same exact reason nothing from the receiver is getting into the fc)

iron vortex
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Well I’m sure i wired it correctly, so could it be that the uart is broken?

iron vortex
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Weird. I mean I solder rx to tx and tx to rx

iron vortex
stone topaz
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(this requires you to solder on the boot pads, and the 5v wire into a 5v pad that only powers when a LiPo is connected)

iron vortex
iron vortex
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Omw home now so imma try to resolder to a different uart tonight and get back here when I’m done

iron vortex
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@stone topaz Just soldered the rx and tx to uart 3 instead of 2 and the green light is now solid green with no connection to the tx

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Seems like after a minute the green light switches to a slow blinking mode

iron vortex
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cant get anything to work so imma try to unbrick it

iron vortex
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Tried the unbricking methods and bridged the boot pad to ground and when flashing I got an error message saying cannot detect rx target, flashing blindly. I also have a mobula 7 that also uses elrs and I can’t get that one to bind either even though it’s worked before

stone topaz
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the mobula 7 could have an spi elrs receiver and it requires to be on bf 4.4+ to sync with expressLRS 3.x
and there's only limited rf mode/packet rate support for it

iron vortex
iron vortex
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@stone topaz So what would the next step be?

stone topaz
iron vortex
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Unsure, I thought that I was supposed to flash it and that failed

stone topaz
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then the best next option is to reflash using a uart adapter. or swap it out with a different receiver
(having a uart adapter, if you don't have one yet, is highly recommended; better have it and not need it, then need it and not have it)

stone topaz
iron vortex
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But I’m unsure of I flashed it correctly

stone topaz
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successful flash should have that green success bar in the configurator

iron vortex
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If I just try one more time to flash it. I can show you a photo of the settings (I turned off telemetry in bf)

stone topaz
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did you rewired the 5v wire of the receiver into a 5v pad that doesn't power up with USB?

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per the guide?

iron vortex
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thats what kinda confused me

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I mean how do i know if a 5v pad is only powered via lipo

stone topaz
iron vortex
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Ok, i have it soldered to a 4v5

stone topaz
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or that when only usb connected to the fc, the pad would read 0v with a multi-meter

stone topaz
iron vortex
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Yes thank you

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brb

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Should i be resolder the 5v back to 4v5 when im done unbricking it?

stone topaz
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not necessary, but your call

iron vortex
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ok

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thats easier

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so i dont have to cut the cable shortrer

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imma try the unbricking now

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I have the usb connected and start to flash and when it says passthrough done i plug in the lipo?

iron vortex
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yes sorry just dont wanna mess up

stone topaz
spark roostBOT
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See the following image to save a log file from the configurator

stone topaz
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looks like it's a connection issue

iron vortex
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just . . . . .after

stone topaz
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can you post a photo of the wiring to uart 3 please

iron vortex
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yes

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Should i resolder?

stone topaz
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I hope you didn't took out that resistor/inductor near the boot pad

iron vortex
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I had to use a lot of solder to get them to bridge but i dont seem to have anything like that behind

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I dont have anything on the boot text like in the picture

stone topaz
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the receiver side wiring could use some improvement. like some additional flux so there's none of those spikes

stone topaz
iron vortex
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Maybe that. I bought it a while ago when getting the ranger micro

stone topaz
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that's kinda a bad spot for a receiver, particularly this v1

iron vortex
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Why?

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Heat?

stone topaz
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vtx heats up, affects the crystal oscillator.. detunes it.. and now the chips are out-of-sync

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won't be affected much if those are tcxo (which the v2 are guaranteed to have)

iron vortex
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So its just a bad receiver?

stone topaz
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at this point, i'd really suggest reflashing via a uart adapter, just to have much fewer variables.

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and while you're at it, get another receiver..

iron vortex
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Wouldnt it be easier to just by a v2? So that it wont get too affected

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exactly

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Maybe i could try using an rp2 temporarily while waiting for the new one since i have one not in use

stone topaz
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your call

iron vortex
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Ill do that then while i wait for a new permanent reciver

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hopefully i can get that one to work

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But thank you very much for the help trying to fix the rp1🙏