I'm trying to upload a simple sketch to the new Wemos Lolin S3 Pro but unfortunately I can't seem to get it to work. I get the following error message:
A fatal error occurred: Failed to connect to ESP32-S3: No serial data received.
For troubleshooting steps visit: https://docs.espressif.com/projects/esptool/en/latest/troubleshooting.html
Failed uploading: uploading error: exit status 2
The following board is causing problems: https://www.wemos.cc/en/latest/s3/s3_pro.html
It seems that there is no USB to UART chip and also no boot button. As board I selected the "LOLIN S3 Pro" in the Arduino IDE and under Platformio I had selected the "lolin_s3". I have also tried it under platformio with the following build flags but unfortunately without success:
build_flags = -DARDUINO_USB_MODE=1 -DARDUINO_USB_CDC_ON_BOOT=1
I am really perplexed what could be the cause?
Btw: I bought 3 of these boards and all 3 have the same issue.