Soil Sensor Assemble

We made a special case for the Stemma soil sensor to keep the circuitry compact.

The two halves snap fit together and feature slots for ventilation.

Attach Soil Sensor

The tabs on the soil sensor case are aligned to the screw holes on the case and secured with two M2.5x6mm long screws.

Position the wire between the raised outline inside the case to insure the wires don't get bent.

Mount Battery

A 6600mAh lipo battery is placed at the bottom of the case.

The battery roof part press fits over the battery. One corner is smaller to allow the wires to pass through.

Mount QT Py

Angle one side of the QT Py board at an angle. The board snap fits into the corners.

Attach sensors

Use M2.5x5mm screws to attach the sensors. 

The SCD-30 Air quality sensor can be mounted to the bottom making a compact and modular circuit sandwich.

To monitor the power we’re using an additional Lipo Battery Monitor so we can be notified when it’s time to recharge.

Battery Gauge

This USB-C connector is wired up to a JST cable so we can easily power the QT Py from the battery monitor.

Identify the pads for power and ground connections on the PCB.

Thread the wires through the USB shell before soldering the connections together.

Mount boards

Now we can connect all of the Stemma breakouts together and start logging some data!

Carefully coil the wires and place the sensors inside the case.

Angle the lid over the case and press each side into place.