external ELRS ES24TX Pro Micro won't take OpenI6X commands

[marco-garcia]

hi, 1st off, many thanks for the custom firmware for this radio

physical connections are fine, battery stable, ExpressLRS menu will come fine (after some seconds to allow ES24TX boot time)

but when I try to change settings like "packet rate" or "model match", the screen refreshes with the same original values

OpenI6X version 2.0.0 (2025-01-23 20:29:04 / EEPR: 222)

[ajjjjjjjj]

Hi and thank you,
what is your Baudrate and aren't you in armed state?

Communication is working because commands that fetch parameters are clearly working.

[ajjjjjjjj]

Added to wiki: https://github.com/OpenI6X/opentx/wiki/Modifications#external-module-power
Let me know if you think that something should be changed.
Thanks.

[marco-garcia]

seems just fine

thanks again Janek!

[marco-garcia]

so it worked for a while and then started to fail again

the real cause ended up being the power ground different from signal ground in the previous Mosfet driver circuit (it was a low-side switch)

this the corrected Mosfet circuit (high-side switch to ensure common ground)

my apologies for any confusion!

[marco-garcia]

@ajjjjjjjj hi Janek, I think it's important to update the diagram on mods wiki page... I can confirm it is working stable now

[ajjjjjjjj]

Updated