ESP32 UART-USB Brige How to use

[stefan.erni]

Hi Martin

Very good, that's something.

Unfortunately, no success yet.
I always get a message saying that the baud rate of Com5 is not supported.
And then com5 is blocked.
Can you tell me which S3 board you have and post your program?

[mnfisher]

I used https://www.amazon.co.uk/diymore-ESP32- ... r=8-5&th=1

(there must be a better way to get a link out of amazon?)

I find I can 'lock' the board - when I need to press and hold 'boot' and then press and release reset to get Windows to recognise it.

I just do a loop with :

Code: Select all

 printf("Hello World\r\n"); 

delay(1s)

If I add a Flowcode UART - channel 1 will open (BUT writing to it doesn't send anything- and the pins can't be selected) - channel 2 seems to lock the board (I tried 19 and 20 (message as above)

When it works - I get the usual esp32 'preamble' - output first then 'Hello.... repeated. Pressing 'reset' closes the COM port - but I can reopen to get

ESP-ROM:esp32s3-20210327
Hello world
Hello world
....

I also toggle a pin (and have a logic analyser attached) - for when I was first looking for 'life'

COM port setting - if I use PuTTY - I use 115200 baud - if I use idf.py -pCOM5 -b 921600 flash monitor - it probably uses 115200 for the monitor (upload is at 921600)?

Occasionally I need to hit the reset button when starting monitoring to get past the 'waiting for download' message.

Currently using 5.4.1 - although I might revert to 5.5 and see if there any differences?

Martin