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This sensor measures soil moisture up to the point where it's really wet. But wait .. it also measures temperature and light level - perfect for measuring the ambient conditions of your plants. A digital I2C sensor, that outputs high resolution, low-noise signals.
Application examples
- Measure the soil moisture of the plants in your home.
- Combine with the Hot, Humid, Air and Light sensors together with Switches to control water valves, to create a full-blown irrigation system for your plants.
Technical specifications
| Product |
Moist sensor |
| Version |
1.0 (September 2015) |
| Sensing parameter |
moisture, temperature and light level |
| Sensing method |
capacitive, thermistor and photodiode sensors |
| Response time |
? s |
| Power supply |
4.75 to 5.25 V DC, ? mA |
| Sensor dimensions |
127 x 16 x 4 mm (mm mm (5.0 x 0.63 x 0.2 inch) |
| Weight |
18 g (0.63 oz) |
| Cable |
1.0 m (39 inch), shielded, red wire = power, black wire = ground, grey wire = I2C data (SDA), white wire = I2C (SCL), maximum extension ? m (? ft) |
| Connector |
male plug with 4 pins in two rows spaced 2.54 mm (0.100 inch) |
| Software support |
- 28 Sep 2015: Moist v1.00 for MacOS and Windows from source code in Max. For multiple sensors or sensor outputs, run multiple instances of the application, each started in its own folder. Requires a digitizer with firmware v7.2 or higher. Use together with Connect (MacOS / Windows).
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| Application notes |
- Please note that this is an electrical device. Do not immerse in water.
- Make sure the sensor is plugged into the digitizer with the red wire connected to power. Reversing the plug may cause damage to the sensor.
- Requires a digitizer with digital (I2C) ports, eg. the USB-microDig or the Wi-microDig.
- The default I2C address is 32 (0x20). Both I2C lines have 4.7 kOhm pull-up resistors.
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