Hi everyone!
Recently my company launched the Homey Energy Dongle — a P1 to Wi-Fi device made specifically for Homey Cloud & Homey Pro.
While of course it’s primarily designed to provide a seamless experience for Homey users, the hardware can be re-flashed with ESPHome for an all-local experience.
I’m writing this how-to for those who enjoy buying well-designed & well-tested hardware by an established brand, but prefer to use it with their own software.
The Homey Energy Dongle has a USB-C port, that when connected to a PC or Mac, you can use to flash ESPHome from a web browser.
Then, use this config:
esphome:
name: homey-energy-dongle
friendly_name: Homey Energy Dongle
on_boot:
- priority: -100.0
then:
- output.turn_on: p1_input_enable
- light.turn_on:
id: led
red: 0%
green: 0%
blue: 100%
esp32:
board: esp32-c6-devkitc-1
flash_size: 4MB
variant: esp32c6
framework:
type: esp-idf
version: 5.3.1
platform_version: 6.9.0
sdkconfig_options:
CONFIG_ESPTOOLPY_FLASHSIZE_4MB: y
ota:
- platform: esphome
password: "..." # Your OTA Password
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
external_components:
- source: github://oxan/esphome-stream-server
stream_server:
- uart_id: p1_input
port: 1234
buffer_size: 256
uart:
- id: p1_input
rx_buffer_size: 256
rx_pin:
number: GPIO4
inverted: true # You might need to flip this to `false` for some meters
baud_rate: 115200 # Change this to 9600 for DSMR v2 meters.
- id: p1_output
tx_pin:
number: GPIO3
inverted: true
baud_rate: 115200
output:
- id: p1_input_enable
platform: gpio
pin:
number: GPIO23
mode: output
light:
- id: led
name: "LED"
platform: esp32_rmt_led_strip
rgb_order: GRB
pin: GPIO2
num_leds: 1
chipset: ws2812
This will let the Homey Energy Dongle create a TCP server on port 1234. Every DSMR telegram will be broadcasted to all clients. You can test this with e.g. nc 192.168.0.100 1234 in a console on macOS.
Then, to import the data into Home Assistant, add the DSMR Smart Meter integration, and enter your device’s IP with port 1234. And your smart meter data, such as live usage (W), consumed electricity (kWh) and gas usage (m3) should appear inside Home Assistant.
Happy hacking! ^.^
Notes
- To revert back to the original firmware, visit usb.homey.app.
- I haven’t managed to get DSMR Passthrough working yet. I’m not very experienced with ESPHome, so maybe some wizard can take a look.
- When returning your product to a store, please factory reset using usb.homey.app. We really don’t want frustrated customers why their ‘Second Chance’ product doesn’t work with Homey.
- The reason the ESPHome DSMR component isn’t used, is because it requires the Arduino framework. However, the Arduino framework does not yet work with the newest ESP32-C6.