1. Test the relay module: Connect VCC of the relay module to 5V, connect GND to ground, connect IN to GND, and the relay will jump. If IN is left floating, the relay will recover. If you repeat this, you can hear the relay's \"stuck\" sound.

2. Test the soil moisture sensor module: Connect the fork probe and the transmitter module with two Dupont lines. The transmitter module's VCC is connected to 5V and GND is grounded. When powered on, the red power light is always on and the green (blue) indicator flashes faintly once: insert the fork probe directly into the water, the green (blue) indicator light turns on

3. Connect the red wire of the water pump to 5V and the black wire to ground. The water pump works. Note that the test only takes 1 second. Do not expose it to the air for a long time.



Due to different batches, the appearance, color, and printed words of the product may vary, which does not affect use.

Material: PCB

Color: As shown



Package contents:

1 x relay module

1 x Soil sensor

1 x Small water pump

1 x battery box

1 x USB power cable

1 pc x 50 cm silicone hose

10 x Dupont cable



Only the above package content, other products are not included.

Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3 cm.