rs485.yaml

# LILYGO T-CAN485 RS-485
# ======================
#
# This ESPHome configuration file configures a LILYGO T-CAN485 board for
# performing RS-485 communication. See
# https://github.com/Xinyuan-LilyGO/T-CAN485 for more details on the hardware.
#
# To use this file, include it via the Remote Packages mechanism and set the
# following in `substitutions`.
# * `rs485_uart_id`. Mandatory. Set this to match the `id` of a `uart` component
#   that you add with the same name where you configure the baud rate, parity,
#   etc., and then attach to higher-level components.

esp32:
  board: esp32dev
  framework:
    type: arduino

uart:
  id: ${rs485_uart_id}
  rx_pin: GPIO21
  tx_pin: GPIO22

# Set pins required for LILYGO T-CAN485 board
# Source: https://github.com/Xinyuan-LilyGO/T-CAN485/issues/16#issuecomment-1872327090
# Alternative: https://gist.github.com/Bwooce/7c43622dcc9bc1fbb04d7a0f1e5528df
output:
  - platform: gpio
    id: ENABLE_PIN # Enable the chip
    pin:
      number: GPIO19
      inverted: true
  - platform: gpio
    id: SE_PIN # Enable autodirection
    pin:
      number: GPIO17
      inverted: true
  - platform: gpio
    id: ENABLE_5V_PIN # Enable 5V pin for RS485 chip
    pin:
      number: GPIO16
      inverted: true