- Voltage: 3.3-12V DC
- Current: working: <20ma; output: <30ma
- Onboard potentiometer with adjustable sensitivity.
- Equipped with waterproof sensor probe with high corrosion resistance ensure long lifetime up to 6 months after plugged into the soil.
- The soil temperature probe detects the humidity, and the voltage comparator judges the magnitude of the humidity. When the humidity is greater than the set value, the DO outputs a low level.
Name: Soil Moisture Sensor
Voltage: 3.3-12V DC
Current: working: <20ma; output: <30ma
Interface: +/- DO AO
DO digital / AO analog
Uses: Detect soil moisture
Principle: The soil temperature probe detects the humidity, and the voltage comparator judges the magnitude of the humidity. When the humidity is greater than the set value, the DO outputs a low level.
Instructions for use:
1. [+] Connect to the positive pole of the power supply, and [-] to the negative pole of the power supply; do not reverse it, otherwise the chip may be burned. After the power supply is connected, the [P] power indicator lights up and the module works normally.
2. The blue potentiometer can be adjusted clockwise/counterclockwise to increase/decrease the detection sensitivity of the probe. Taking the thermal sensor as an example, suppose the default is 25℃ trigger, [DO] output low level is effective. After adjusting clockwise, the temperature can be triggered when the temperature is lower than 25℃. Counterclockwise triggers above 25°C.
3. When the potentiometer is adjusted clockwise until the [S] output indicator is on, it means that the adjustment range has exceeded the threshold, and when it is adjusted counterclockwise, it cannot exceed the threshold. During mediation, the threshold cannot be exceeded, otherwise it cannot be used normally. The potentiometer adjustment is only for the [DO] port, and it is not related to the [AO] output.
4. [AO] The output is an analog quantity (voltage), which can be directly detected through the AD port of the single-chip microcomputer.
Board Size：35.5 × 15 × 9.2 mm
Probe Size：109 × 18.7 × 8 mm
Probe cable length：117 cm
Kit Weight: 20g
1 × Soil Moisture Sensor
1 × Sensor Probe
1 × pin header