ESP32-C3-4.2 OLED

Just some notes/observations after using some of these ESP32-C3 with built in 0.42 oled displays.

First thing is the antenna, one of those small ceramic things is crap, check out the mod on this guys site.  I made same mods and went from about 5m range inside to 30m+ from inside to outside before I gave up walking further away 😅, well worth it.

Second thing I found was after playing with espnow was when I reflashed the esp32 with some plain wifi code it wouldn't connect. I could scan AP's but it wouldn't connect. I then erased flash (I use platformio on VSC and it's under the advanced section in the platformio section) and reloaded the wifi test program and all was well. Didn't investigate further but something to be aware of.