On HTCC-AM01 Recommended hardware design I can find the design as I would like it. The question I have is regarding the comment “For AT command usage (No Arduino support)”: is there no way to upload an Arduino Sketch with that design? Does the procedure described at 1 not work?
I know that there is this: https://resource.heltec.cn/download/CubeCell/HTCC-AM01_Module/HTCC-AM01_Reference_Design(Arduino).pdf
Bu I do not want the CP2102 part nor the USB/Battery circuit, and the Auto-Boot circuit only if really mandatory.