Testing

FTDI & Atom

The easiest way to test that your air pollution monitor is working correctly is using an FTDI-USB cable and the RX, TX & GND pin headers on the Grove Socket PCB. Connecting the device in this way allows you to view all of the messages and readings in Atom.

RGB LED

The RGB LED on the LoPy board shows the status of the board. Below is a table summarising the statuses:

Colour code	Status
Initialising	Amber
Initialisation succeeded	Green light blinks twice
Cannot access SD card	Red light blinking immediately after boot
Other issue	Red light flashing during initialisation
Runtime errors	Red blinks