ExpressLRS / ExpressLRS-Hardware

STM32/ESP32/ESP8285-based High-Performance Radio Link for RC applications
248 stars 98 forks source link

Betafpv ELRS Flat antenna receiver bricked(help wanted) #35

Open yangyu823 opened 2 years ago

yangyu823 commented 2 years ago

Hi guys. Help wanted!!! image

Got issue with my new Betafpv ELRS flat antenna nano receiver, any help are appreciated.

image

Background:

Wire it up and flash successfully the v2.2 offical firmware through WIFI to match my TX.
After successful flash, the receiver bricked with slow single short LED flash and no other response
(No binding, No WIFI, No flash firmware)

Current symptom:

1. Slow single short LED flash after power up. Can't bind, flash, wifi etc.

https://user-images.githubusercontent.com/14341558/155278344-796e7353-ac8e-43bb-be09-3ae9ecc3df7c.mp4

Flash through UART will fail with ESP8266 timeout exception image

2. Short firmware upgrade pad and GND. Power up with Sold blue LED.

Short two pad and power up. Receiver got solid LED. Can flash through UART only (BFpassthrough with ESP8266 exception, WIFI can't enable, UART flash works) image image image

Tried Offical v2.2 v2.0 firmware, Betafpv v2.0 v1.1.0 forked firmware. All can flash successfully with above mentioned UART method. But issue remains.

Power cycle three times won't help either. slow led flash no response remain.

At this stage, I was wonder whether this is a hardware issue. If anyone can explain the meaning of slow short single LED flash means. That would be appreciated as well.

Thank you Regards