zorruno-homeassistant/esphome/esp-espnow_test_transmitter1.yaml

#:########################################################################################:#
# ESP-NOW Test Transmitter
#:########################################################################################:#
#
# DEVICE:
#   ESP32-S3-Zero / ESP32-S3 Super Mini
#
# VERSION:
#   1.1 - 2026-07-11
#     - Removed duplicate GPIO4 binary sensor declaration.
#     - GPIO4 is now used only as the deep-sleep wake pin.
#     - Added KEEP_AWAKE handling while the wake button remains pressed.
#     - Uses a random press ID rather than flash-backed press counting.
#     - Sends each button press three times for improved reliability.
#     - Configured ESP-NOW to use Wi-Fi channel 5.
#
# WIRING:
#   GPIO4 ---- momentary button ---- GND
#
# OPERATION:
#   - Initial power-up or reset causes one test transmission.
#   - The ESP32 then enters deep sleep.
#   - Pressing the button pulls GPIO4 LOW and wakes the ESP32.
#   - The ESP32 broadcasts the same message three times.
#   - It waits until the button is released and returns to deep sleep.
#
# MESSAGE FORMAT:
#   REMOTE_A:BUTTON_1:123456789
#
# IMPORTANT:
#   - The receiver must be operating on Wi-Fi channel 5.
#   - This transmitter intentionally has no Wi-Fi, API or OTA configuration.
#   - Future updates will normally be installed by USB.
#
#:########################################################################################:#

substitutions:
  device_name: esp-espnow-test-transmitter1
  friendly_name: "ESPNow Test Transmitter 1"

  remote_id: "REMOTE_A"
  button_id: "BUTTON_1"

  espnow_channel: "5"
  wake_pin: "4"

#:########################################################################################:#
# ESPHome Core
#:########################################################################################:#

esphome:
  name: ${device_name}
  friendly_name: ${friendly_name}

  on_boot:
    priority: -100
    then:
      - logger.log:
          level: INFO
          format: "ESP-NOW transmitter booted."

      - lambda: |-
          id(press_id) = esp_random();

          char payload_buffer[96];
          snprintf(
            payload_buffer,
            sizeof(payload_buffer),
            "${remote_id}:${button_id}:%lu",
            static_cast<unsigned long>(id(press_id))
          );

          id(transmit_payload) = payload_buffer;

          ESP_LOGI(
            "espnow_tx",
            "Prepared payload: %s",
            id(transmit_payload).c_str()
          );

      - script.execute: send_espnow_press
      - script.wait: send_espnow_press

      - logger.log:
          level: INFO
          format: "Transmission sequence finished. Entering deep sleep."

      - delay: 250ms

      - deep_sleep.enter: deep_sleep_control

#:########################################################################################:#
# ESP32 Hardware
#:########################################################################################:#

esp32:
  variant: esp32s3
  framework:
    type: esp-idf

#:########################################################################################:#
# Logging
#:########################################################################################:#
#
# USB serial logging is useful during initial testing.
# It does consume some power while the device is awake, but awake time is brief.
#

logger:
  level: DEBUG

#:########################################################################################:#
# ESP-NOW
#:########################################################################################:#
#
# The transmitter is not joining Wi-Fi, so the ESP-NOW radio channel must be
# configured explicitly.
#

espnow:
  channel: ${espnow_channel}

#:########################################################################################:#
# Globals
#:########################################################################################:#

globals:
  - id: press_id
    type: uint32_t
    restore_value: false
    initial_value: '0'

  - id: transmit_payload
    type: std::string
    restore_value: false
    initial_value: '""'

#:########################################################################################:#
# ESP-NOW Transmission Script
#:########################################################################################:#

script:
  - id: send_espnow_press
    mode: single
    then:
      - logger.log:
          level: INFO
          format: "Sending ESP-NOW broadcast 1 of 3."

      - espnow.broadcast:
          data: !lambda |-
            return std::vector<uint8_t>(
              id(transmit_payload).begin(),
              id(transmit_payload).end()
            );
          wait_for_sent: true
          continue_on_error: true
          on_sent:
            - logger.log:
                level: DEBUG
                format: "Broadcast 1 sent."
          on_error:
            - logger.log:
                level: WARN
                format: "Broadcast 1 reported an error."

      - delay: 50ms

      - logger.log:
          level: INFO
          format: "Sending ESP-NOW broadcast 2 of 3."

      - espnow.broadcast:
          data: !lambda |-
            return std::vector<uint8_t>(
              id(transmit_payload).begin(),
              id(transmit_payload).end()
            );
          wait_for_sent: true
          continue_on_error: true
          on_sent:
            - logger.log:
                level: DEBUG
                format: "Broadcast 2 sent."
          on_error:
            - logger.log:
                level: WARN
                format: "Broadcast 2 reported an error."

      - delay: 50ms

      - logger.log:
          level: INFO
          format: "Sending ESP-NOW broadcast 3 of 3."

      - espnow.broadcast:
          data: !lambda |-
            return std::vector<uint8_t>(
              id(transmit_payload).begin(),
              id(transmit_payload).end()
            );
          wait_for_sent: true
          continue_on_error: true
          on_sent:
            - logger.log:
                level: DEBUG
                format: "Broadcast 3 sent."
          on_error:
            - logger.log:
                level: WARN
                format: "Broadcast 3 reported an error."

#:########################################################################################:#
# Deep Sleep and Wake Button
#:########################################################################################:#
#
# GPIO4 is pulled HIGH internally.
# Pressing the button connects GPIO4 to GND and wakes the ESP32.
#
# KEEP_AWAKE prevents an immediate sleep/wake loop if the button is still held
# when the transmission sequence finishes.
#

deep_sleep:
  id: deep_sleep_control

  wakeup_pin:
    number: GPIO${wake_pin}
    mode:
      input: true
      pullup: true
    inverted: true

  wakeup_pin_mode: KEEP_AWAKE