Flashing not working.

[vidalv]

Hello, I try to flash my part without success. I use first the chrome interface on my laptop, after connection it's impossible to start flashing :

Looking on issues on the git I found another utility :

With this it seems the firmware version 2.1.1_0159 is not supported, any other solution please ?
Thanks.

[atc1441]

Hey, yes that new firmware added signing to the firmware so you need to flash it by wires

[vidalv]

Thanks @atc1441, argh!!! too bad ! No work around .... Any link to do that ?

[atc1441]

No work around right now: https://github.com/atc1441/ATC_MiThermometer?tab=readme-ov-file#usb-to-uart

[vidalv]

Ok thanks, after hard flash is it possible to flash (for future need) with OTA ?

[atc1441]

Yes

[vidalv]

Super ! Thanks again.

[vidalv]

Just a comment about wiring, I'm Ok for VCC (3.3V) and GND, but snapshot is disappointing :

Only One wire for TXD and RXD (no resistor ?!!?) Could you clarify ?
I would like to use my USB to TTL (UART) converter but USB is 5V not 3.3V ... This can damage the UC.

[atc1441]

Yes you can leave out the resister and connect directly
Please use 3.3V Uart converter

[vidalv]

I've found this :

Is SWS same as P14 (RXD / TXD), I want to use this USB/UART :

But is a FTDI module, is it usable ? I read this :
Warning - Does not work on USB-COM adapters that have LEDs on at the RX input.

• Does not work on USB-COM adapters that have FTDI chip

Thanks.