IR

• Overview
• ESPHome config
• References

Overview

Using a TSOP38238 IR receiver diode.

ESPHome config

Set up a remote_receiver component, these settings work well for me with a TSOP38238 diode:

remote_receiver:
  id: recv_ir
  pin:
    number: ${receiver_pin}
    inverted: true
    mode:
      input: true
      # Enable the internal pullup if you dont have any external pullup
      # resistors in the circuit and are getting unreliable readings
      pullup: false
  # Decode and dump thse remot protocols/codecs to the logger
  # on log_level INFO
  dump: "all"

  # Percentage that the remote signal lengths can deviate in the
  # decoding process
  tolerance: "50%"
  # Filter pusles shorter than this
  filter: 250us
  # How long a signal shold remain stable (not change) to be considered
  # complete
  idle: 4ms

  # Default for ESP32
  buffer_size: "10kb"

  # only on ESP32
  memory_blocks: 3
  on_rc_switch: {}

Watch the log output, point an IR remote in the vague direction of the IR diode and press some buttons. The keycodes get dumped into the log and you can set up binary_sensor components or automations for them.

The remote for my amplifier uses the nec protocol:

binary_sensor:
  - platform: remote_receiver
    id: ir_nad_vol_down
    name: "NAD VOL_DOWN"
    icon: "mdi:volume-minus"
    entity_category: ""
    nec:
      address: 0x7C87
      command: 0x738C
    filters:
      - delayed_off: 2s

  - platform: remote_receiver
    id: ir_nad_vol_up
    name: "NAD VOL_UP"
    icon: "mdi:volume-plus"
    entity_category: ""
    nec:
      address: 0x7C87
      command: 0x7788
    filters:
      - delayed_off: 2s

Creates two binary_sensor entities that briefly turn true when the keycodes for the volume buttons are emitted and detected.

References