M5Stack watering unit (U101) – moisture sensor and pump for automatic watering

The watering unit has both a moisture sensor and a small water pump. The sensor sits in the pot, the pump in a water container, and when the soil gets dry the pump starts. Control everything from Home Assistant, or let ESPHome handle it on its own.

Good to know

The moisture sensor is capacitive and has no exposed metal prongs, so it doesn't corrode like a simple resistive sensor. Tubing is included. The pump must sit in the water and must not run dry.

Works with

• ESPHome (adc for moisture, switch for the pump)
• Home Assistant via ESPHome
• M5Stack controllers with an analogue input on the Grove port

You also need

A controller, for example the ATOM Lite or AtomS3 Lite, and a water container. Grove cable included.

Specifications

• Moisture sensor: capacitive, analogue output
• Pump: 5 V, controlled via the Grove port
• Included: watering unit, pump, tubing and Grove cable

Manufacturer and documentation

Manufacturer: M5Stack Technology Co., Ltd, Block A10, Expo Bay South Coast, Fuhai Street, Bao'an District, Shenzhen, China, [email protected]. EU representative: Success Courier SL, Calle Rio Tormes 1, Planta 1, Derecha, Oficina 3, 28947 Fuenlabrada, Madrid, Spain, [email protected].

• Product documentation (M5Stack)
• Manufacturer certifications (CE/RoHS)

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