Alternative WP34S flashing using Arduino

[FreeBlues]

(09-03-2023 10:33 PM)pangushk Wrote:  

(05-17-2023 12:46 PM)slabco Wrote:  failed too with ch340 series.
successed with the genuine FTDI at the moment I deciderd to give up.

I cannot find the cable nor any module with FTDI in my hand. Making the custom cable is definitely not my taste, although I have all the pogo pins already!

I successfully flashed with Arduino nano clone (with ATMEGA168 MCU not 328, which does not matter since the flashing procedure would disable it anyway) with CH340C on win11, but
1. has to remove the RX/TX LED on arduino nano clone to make the loopback test works! check this out:
https://forum.arduino.cc/t/arduino-faili...e/473276/8
2. run MySamba with Administrator, or else the program did not see the Serial Port!

Great thanks to all you guys for the great work!!!! I finally convert a HP20B to WP34S !!

Thanks a lot for your post!
It took me an entire afternoon to try out my Arduino Nano with Ch340C. Although I had a faint suspicion that the problem might lie with the Ch340C, I wasn't certain. After reading your article, I finally confirmed the root cause of the issue. However, removing the RX/TX LED was a bit tricky for me, so I'll have to order an Arduino Nano that uses the FTDI chip. Thank you again!