There is an error in the diagram #3
Description
-The 10K resistor should not be in series with the + 3.3V power supply line
- On my UNO, the 3V3 output is too weak. An external 3v3 LDO regulator had to be added with its capacitors.
Below is the modified schema. The 2 resistors 10k are optional. RST and CHPD could be connected directly to + 3v3
