Can't flash EP2 RX | ExpressLRS Community | Page 1

hearty seal Aug 31, 2024, 7:34 AM

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I tried to flash 2.4G EP2 RX to v3.3.0 via BetaflightPassthrough and failed.
Does anyone know how to flash?

My settings are in the image.

The error message showed this.

======== PASSTHROUGH INIT ========
  Trying to initialize COM3 @ 420000


Attempting to detect FC UART configuration...

    ** Serial RX config detected: 'serial 4 64 115200 57600 0 115200'
Enabling serial passthrough...
  CMD: 'serialpassthrough 4 420000'

======== PASSTHROUGH DONE ========
======== RESET TO BOOTLOADER ========

  * Using full duplex (CRSF)

Wrong target selected your RX is 'HAPPYMODEL_EP_2400_RX', trying to flash 'UNIFIED_ESP8285_2400_RX'

hearty seal Aug 31, 2024, 8:16 AM

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I tried to update tp v2.5.2.
I got the error that attached file.

📎 message.txt

rapid wave Aug 31, 2024, 10:02 AM

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hearty seal I tried to flash 2.4G EP2 RX to v3.3.0 via BetaflightPassthrough and failed. Doe...

use the Force Flash option on the configurator (on 3.4.3)

hearty seal Aug 31, 2024, 10:12 AM

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@rapid wave
Thank you for advice.

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It has error here.

  ** Searching flight controllers **
      > FC found from 'COM3'

Detected the following serial ports on this system:
  COM3

======== PASSTHROUGH INIT ========
  Trying to initialize COM3 @ 420000


Attempting to detect FC UART configuration...

    ** Serial RX config detected: 'serial 2 64 115200 57600 0 115200'
Enabling serial passthrough...
  CMD: 'serialpassthrough 2 420000'

======== PASSTHROUGH DONE ========
======== RESET TO BOOTLOADER ========

  * Using full duplex (CRSF)

Cannot detect RX target, blindly flashing!

esptool.py v4.2.1
Serial port COM3
WARNING: Pre-connection option "no_reset" was selected. Connection may fail if the chip is not in bootloader or flasher stub mode.
Connecting...
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rapid wave Aug 31, 2024, 10:15 AM

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hearty seal It has error here. ``` ** Searching flight controllers ** > FC found fro...

your earlier log say the receiver is on uart 5

serial 4 64 115200 57600 0 115200
but now it's resulting on an error on uart 3
serial 2 64 115200 57600 0 115200

so where is the receiver?

hearty seal Aug 31, 2024, 10:18 AM

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It is not uart 3.
I changed the port from 5 to 3 in order to check the port is not the reason.

rapid wave Aug 31, 2024, 10:19 AM

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but where in the actual F is the receiver wired to?

hearty seal Aug 31, 2024, 10:20 AM

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the actual FC is on uart 3

rapid wave Aug 31, 2024, 10:20 AM

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and why did it errored out now but it detected the receiver on uart 5 earlier?

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Wrong target selected your RX is 'HAPPYMODEL_EP_2400_RX', trying to flash 'UNIFIED_ESP8285_2400_RX'
this line say the script has found the receiver..

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from your original log above

hearty seal Aug 31, 2024, 10:24 AM

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After flash the rx to v2.5.2 (the second log), it may started to lost the fc.
Is this answering your question?

rapid wave Aug 31, 2024, 10:25 AM

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hearty seal After flash the rx to v2.5.2 (the second log), it may started to lost the fc. Is...

your attempt to flash to 2.5.2 didn't succeed either

hearty seal Aug 31, 2024, 10:25 AM

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yes.

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it didnt succeed

rapid wave Aug 31, 2024, 10:26 AM

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so you haven't flashed anything yet

hearty seal Aug 31, 2024, 10:26 AM

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you right.

rapid wave Aug 31, 2024, 10:26 AM

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and doesn't even matter.. what matters is where in the actual fuck the receiver is wired to

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is it on uart 5 or uart 3?
if it's on uart 3, then why did the script didn't "see it"?

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could you please post a photo of the current receiver wiring please

hearty seal Aug 31, 2024, 10:33 AM

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This is fc and the diagram.

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rapid wave Aug 31, 2024, 10:35 AM

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hearty seal

so you moved it from uart 5?

hearty seal Aug 31, 2024, 10:35 AM

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right

rapid wave Aug 31, 2024, 10:35 AM

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hearty seal right

put it back to uart 5 where it was detected earlier

hearty seal Aug 31, 2024, 10:40 AM

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now moved to uart 5

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rapid wave Aug 31, 2024, 10:43 AM

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then please try flashing via Passthrough once again.. start by unplugging-repluging the usb and closing betaflight configurator

hearty seal Aug 31, 2024, 10:50 AM

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Oh, no.
boot pad was peeled off...
It is better to buy new one.

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thank you for help.

rapid wave Aug 31, 2024, 12:34 PM

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hearty seal Oh, no. boot pad was peeled off... It is better to buy new one.

you don't need the boot pad here..

hearty seal Aug 31, 2024, 1:50 PM

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rapid wave you don't need the boot pad here..

Thank you!!!!
And the force flash to v3.4.3 was worked!!!!!!!!!!

#Can't flash EP2 RX