HTCC-AM02 Will Only Start When Serial Monitor Opened

Hi All,

Any ideas what would cause this?

The circuit I have created uses the Heltec recommended auto boot components and CP2102 USB-UART controller.

Program loaded runs absolutely fine once I’ve connected via USB and opened serial monitor in Arduino IDE. Carries on running even if USB disconnected. Just won’t start up without connecting via USB and opening serial monitor.

Many thanks in advance.

Update: Resolved
I had put a 2.2nf capacitor from reset to gnd rather than 2.2uf.

This looks very good.