tvocmeter

Sensor that measures equivalent total volatile organic compounds (TVOC) and publishes it over MQTT

OTA via PlatformIO

Install platformio (sudo pip3 install platformio)
Run ./upload.sh
If the password was wrong, rm OTA_PASSWORD.h and try again

OTA via Arduino IDE (untested; does this work?)

Create OTA_PASSWORD.h and add:

#define OTA_PASSWORD "passwordhere"
Make sure Arduino IDE is closed (all windows!)
Start Arduino IDE