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8 Relays Expander. TASMOTA firmware Guide.

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Follow these steps:

Connect relays expanders to the controller and set up the I2C address. Reset controller. Follow this hardware connecting instruction: ESP32R4 Relays Expander. Hardware Guide

  • Open the TASMOTA web interface. Menu – Configuration – Configure Module. Setup GPIO for I2C:
    IO GPIO21 – I2C SDA – 1
    IO GPIO22 – I2C SCL  – 1
  • Open the TASMOTA web interface. Menu – Configuration – Configure PCF8574
  • For all ports, setup Output. Save.
  • Find new relays on the main page
  • Friendly buttons name: In Console send command: WebButton<x> <NAME>For example: WebButton5 Hall   *TASMOTA can change a name for buttons 1~16

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