Headers for gas and particulate sensors¶
There are 4 headers for connecting sensors to the board. For a particulate-only board, you can skip Headers P1 and P2.
- P1 and P2 - Connecting the Alphasense Gas sensor headers
- P9 - Connecting the Alphasense OPC-N2 particulate sensor
- P3 - UEXT general purpose expansion header. Has 12C, SPI and UART. Can also be used as additional analog inputs e.g. for connecting methane sensor.
- Solder the headers onto the board as shown in the images below.
