Stamp-C3 update thru pins (pinout question)

[davekc]

Question

Does anyone know if it is possible to upload from Arduino IDE to the Stamp-C3 using the PORT.U pins (GND, G18/D-, G19/D+, 5V) instead of using the USB-C connector? Since the ESP32-C3 does not support OTG, I assume that PORT.U and USB-C are the same, no? Otherwise, using the ESP32 Downloader Kit via the ISP pins would be the only solution if one wants to go through PCB, right? Thanks!

[felmue]

Hello @davekc

M5Stamp-C3: PORT-U pins and USB-C are not the same. Check schematics here.

M5Stamp-C3U: PORT-U pins and USB-C are the same. Check schematics here.

Thanks
Felix

[davekc]

Hello @felmue,

To be honest, I doubted your response, and I had to review those schematics to realize that I had missed it. Thank you so much!

Regards,
Dave

[teastain]

@davekc You doubt him at your peril, Sir!