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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, exposing the green PCB and mezzanine connector

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 marking beside the mezzanine connector on the MTR-1 PCB

Tool pointing to the X marking in the top left corner of the GPIO Header addon

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 PCB, with the new backplate ready to fit

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.

Fingers pressing the new backplate onto the MTR-1 around the GPIO Header addon

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

Assembled MTR-1 with the new backplate sitting flush around the GPIO Header addon

GPIO Header addon pinout diagram labeling the GND, 5V, 3V, SDA, SCL, and IO pins

Make sure to check out our GPIO Header LED Strip Tutorial!

Brandon AKA SmartHomeSellout made this tutorial for connecting a short LED strip through the GPIO Header. It's shown on an MSR-2, but the same steps work on your MTR-1.

GPIO LED Strip Tutorial