M5Stack ATOM Tail485 (T002) – RS485/Modbus adapter for Atom

The Tail485 attaches under an Atom controller and gives it an RS485 interface. That opens the door to Modbus: read energy meters, solar inverters, ventilation units and heat pumps in Home Assistant.

Good to know

The adapter can power the Atom controller from the RS485 cable's supply (DC voltage), so you don't need a separate USB charger where the equipment sits. Check the voltage range in M5Stack's documentation before connecting. Only connect to the low-voltage part (the RS485 terminal) of your equipment, never to 230 V.

Works with

• ESPHome (components uart and modbus_controller)
• Home Assistant via ESPHome
• ATOM Lite, AtomS3 Lite and other Atom controllers

You also need

An Atom controller, for example the ATOM Lite or AtomS3 Lite, and a two-wire cable for the RS485 bus.

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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