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ESP32_ARDUINO.md

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Arduino -> Esphome

Here is a example how to write sensor values from a Arduino to the esphome device.

Schematics

Connect the UART ports from both devices with a level shifter in between. The level shifter is necessary for the 5v Arduino to 3.3v ESP32.

Configuration

Arduino

Open the sketch-esphome-uart-p2p.ino with Arduino IDE. There is already a sample included that sends each 5s a random number (0-100) to the esphome device.

Esphome

Configure the esphome device like this:

esp32:
  board: esp32dev
  framework:
    type: arduino

external_components:
  - source:
      url: github://KG3RK3N/esphome-uart-p2p
      type: git
    components: [uart_p2p_receiver]

# Enable logging
logger:

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

captive_portal:

web_server:
  port: 80

uart:
  - id: uart_1
    tx_pin: GPIO17
    rx_pin: GPIO16
    baud_rate: 115200

uart_p2p_receiver:
  - uart_id: uart_1
    sensors:
      - id: receiver_sensor_arduino
        name: "Arduino sensor"
        address: 0x01