We recommend using a Female-to-Female Stemma Connector and plugging it in between the PyPortal and the STEMMA Soil Sensor. No soldering is involved - just connect the cable between the Stemma Soil Sensor and the PyPortal's I2C port.

Angled shot of 150mm/6" long 4-Pin JST-PH Cable
This 4-wire cable is a little over 150mm / 6" long and fitted with JST-PH female 4-pin connectors on each end. These types of JST cables are commonly found on small rechargeable...
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The cable makes the following connections between the PyPortal's I2C port and the STEMMA Soil Sensor:

  • PyPortal 5V to Sensor VIN
  • PyPortal GND to Sensor GND
  • PyPortal SCL to Sensor SCL
  • PyPortal SDA to Sensor SDA

That's it - your PyPortal is wired up!

When you're ready, just stick the STEMMA Soil sensor into your plant's soil. Be sure to leave the white portion of the sensor not covered by soil. You may also want to position the sensor at the edge of your plant's pot.

This guide was first published on May 24, 2019. It was last updated on Apr 15, 2024.

This page (PyPortal Wiring ) was last updated on Mar 08, 2024.

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