This pump is a brushed motor, which does not last as long as the brushless ones and is not suitable for long periods in the air. Suitable for 6mm inner diameter water pipe. You can build an automatic watering system with our 5V relay module and soil moisture sensor module. No programming required.

The red line of the small water pump is the positive pole of the motor, the black line negative pole, not reverse connection or it will suck backward. Absolute humidity value is for the air, refers to the mass of water contained in one cubic metre of air, and this indicator in the soil due to the soil dissolution of water is not uniform, so it can not be measured, and there is no discussion value. The soil moisture sensor module can measure the humidity roughly and decide to switch the watering equipment on and off according to the humidity, the sensitivity can be adjusted roughly with a potentiometer.

Cautions
1, the supply voltage is 3-5V.
2, the red line of the pump is positive, black line is negative, positive and negative poles can not be connected to the reverse, otherwise it will backsiphon. The positive and negative poles can not be connected to the opposite, otherwise it will be sucked back.
3, the water pump is a brush motor, life is not as long as brushless, not suitable for It is not suitable for running in the air for a long time.
4、Products do not send matching water pipes, water pipes and pumps in the same
link, the diameter of the water pipe is 6mm, the length of a water pipe is one metre.