This is an smooth to apply virtual soil moisture sensor. Just insert the sensor withinside the soil and it is able to can degree moisture or water stage content material in it. It offers a virtual output of 5V whilst moisture stage is excessive and 0V whilst the moisture stage is low withinside the soil.
The sensor consists of a potentiometer to set the favored moisture threshold. When the sensor measures extra moisture than the set threshold, the virtual output is going excessive and an LED suggests the output. When the moisture withinside the soil is much less thatn the set threshold, the output stays low. The virtual output may be related to a micro controller to feel the moisture stage. The sensor additionally outputs an analog output which may be related to the ADC of a micro controller to get the precise moisture stage withinside the soild.
Features of SIM900A:
- Operating voltage: 3.3V~5V
- Dual output mode,analog output more accurate
- A fixed bolt hole for easy installation
- With power indicator (red) and digital switching output indicator (green)
- Having LM393 comparator chip, stable
- Panel PCB Dimension: Approx.3cm x 1.5cm
- Soil Probe Dimension: Approx. 6cm x 3cm
- Cable Length: Approx.21cm
- VCC: 3.3V-5V
- GND: GND
- DO: digital output interface(0 and 1)
- AO: analog output interface
