The Soil Moisture Sensor is a modern, completely sealed capacitive moisture sensor with temperature sensor. It is using 1-Wire communication protocol and has 3 wire cable that is 2 meters long. Many sensors can be connected to a single 1-Wire Master. The temperature sensor is located in the top part above the soil. The electronics is completely potted in a sealing compound to withstand all kind of weather.
The sensor returns soil moisture humidity using relative values. Sensor is very sensitive and you can get range from 6500 when sensor is dry and 13000 when sensor is fully submerged into the water. Measuring is done by two copper strips inside the inner layers of the 4 layer PCB. This way the contacts are not exposed to direct humidity and do not oxidize.
It is also possible to use sensor to measure water level.
Sensor is already supported in BigClown SDK with examples and projects.
Soil moisture sensor
Fully digital design
1-Wire bus communication
Possibility to connect multiple sensors in parallel
Capacitance-to-digital converter ZSSC3123
Digital temperature sensor TMP112
Operating voltage range: 2.8 V to 5.5 V
Operating temperature range: -40 to +85 °C
Protection marking IP 68