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Adding GPIO header to MTR-1

You'll seat the GPIO Header addon on the mezzanine connector on the back of your sensor, then fit the new back that came with it.

1. Unplug your MTR-1 from power and remove the stand if attached.

Back of the MTR-1 with the stand still attached beside the USB-C port

2. Remove the backplate of the MTR-1.

MTR-1 with the backplate removed, showing the circuit board inside the case

3. Identify the "X" on the PCB on the back of your MTR-1 and the "X" on the top left corner of the GPIO Header addon.

Tool pointing to the X mark on the MTR-1 board, with the GPIO Header addon beside it

Close-up of the X mark on the GPIO Header addon next to the MTR-1 connector

4. Keep the "X" aligned on both sides and gently push down until it securely seats in the small mezzanine connector.

GPIO Header addon seated on the MTR-1 board, with the new back set aside

5. Align the new back for your MTR-1 that came with the GPIO Header addon. Push down on the corners closest to the GPIO Header addon first, and then push the back on securely on the other two corners.

Pressing the new MTR-1 back down around the installed GPIO Header

6. The case should sit flush and you're now ready to add functionality to your device!

MTR-1 with the new back sitting flush around the GPIO Header

GPIO Header pinout: GND, IO18, IO19, IO4, IO2, IO6 on the left; 5V, IO7, SDA, SCL, GND, 3V on the right

Click here to head to the GPIO Header LED Strip Tutorial!