Product Name: 2PCS Soil Humidity Moisture Hygrometer Sensor Module Corrosion Resistance Probe
Size: 36*15*7mm
Voltage: DC 3.3-12V
Current: <20mA; <30mA (output)
Interface: + - DO AO; DO digital value; AO analog value
Operating Temperature: -25~85 Celsius
Application: Used for detecting soil humidity.
Principle: The soil humidity probe detects humidity, and the voltage comparator judges humidity amount. When the humidity is larger than the set value, DO will output a low level.

Using Introduction:
1. "+" connects power positive; "-" connects power negative. Please do not connect reversely, or it will burn the chip. After connection, "P" power indicator lamp will be on and the module will operate normally.
2. Clockwise/counter clockwise adjust the blue potentiometer to improve/reduce the detection sensitivity. For example, if the default trigger is 25 Celsius, DO output low level is valid. Clockwise adjusting makes triggering possible when the temperature is lower than 25 Celsius, while counter-clockwise adjusting allows triggering when the temperature is higher than 25 Celsius.
3. When clockwise adjusts the potentiometer to "S," the output indicator is on, indicating that the adjusting range has surpassed the testing threshold. Counter-clockwise adjusting to its maximum extent also surpasses the threshold. Take care not to let them go over the threshold during adjustment, or it cannot be used normally. Potentiometer adjustment is only used for the DO port and has no relevance to AO output.
4. AO output is an analog value (voltage) that can be detected via MCU AD port. When the detected value is more than the set value, DO will output a low level, and the triode will be connected, allowing the load to operate. 1K is a current-limiting resistor, and 10K is a pull-up resistor on the DO port. No more complex circuits, AO port can collect voltage via MCU AD port.

Package Included: 2 x Soil Humidity Moisture Hygrometer Sensor Module Corrosion Resistance Probe

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