Recommended · for beginners
How to program ESP32 CAM using Arduino UNO
Why people recommend it
Linked as a tutorial for loading code onto an ESP32-CAM with the help of an Arduino board, though several people following it hit connection problems.
Watch for: some followers had port and serial trouble
In their words
I just thought maybe there is a chance to program D1 Mini with Arduino?
dma_k on electronics.stackexchange.com, Mar 2021. CC BY-SA.