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Name: Soil Moisture Sensor
Size: 36×15×7mm（1.42*0.6*0.28in）
Voltage: 3.3-12VDC
Current: Working current
Interface: + - DO AO,DO digital/AO analog
Directions of use:
1. [+] connect to the positive pole of the power supply; [-] connect the negative pole of the power supply; Do not reverse the connection, otherwise it may burn out Chip. When the power is connected, the [P] power indicator lights up. The module is working properly.
2. The blue potentiometer can be adjusted clockwise/counterclockwise, which can increase/decrease the detection sensitivity of the probe, taking the "thermal sensor" as an example, assuming that the default is triggered at 25°C, and the [DO] output is valid at a low level. After clockwise adjustment, the temperature can be triggered when the temperature is below 25°C. Counterclockwise is triggered above 25°C.
3. When the potentiometer is adjusted clockwise to the output indicator light of [S], it means that the adjustment range has exceeded the test threshold, and when it is adjusted counterclockwise to the point that it cannot be adjusted, the threshold value is exceeded. When adjusting, the threshold value cannot be exceeded, otherwise it cannot be used normally. Potentiometer adjustment is only used for the [DO] port and is not related to the [AO] output.
4. The output of [AO] is analog (voltage), which can be directly detected by the AD port of the single-chip microcomputer.
