# Arduino / Homeduino met ESP8266 aansturen pinnen op Arduino

**URL:** <https://community.homey.app/t/arduino-homeduino-met-esp8266-aansturen-pinnen-op-arduino/6265>\
**Category:** Devices\
**Created:** [January 4, 2019, 12:05am UTC](https://community.homey.app/t/arduino-homeduino-met-esp8266-aansturen-pinnen-op-arduino/6265 "2019-01-04T00:05:38Z")\
**Posts on this page:** 1\
**Showing post:** 31

<div class="post-metadata">

**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\
**Post date:** [January 9, 2019, 8:00pm UTC](https://community.homey.app/t/arduino-homeduino-met-esp8266-aansturen-pinnen-op-arduino/6265/31 "2019-01-09T20:00:15Z")

</div>

Here’s what I wrote this evening (also for an BH1750, connected to an ESP8266):

```auto
#define MY_DEBUG
#define MY_GATEWAY_ESP8266
#define MY_GATEWAY_MQTT_CLIENT
#define MY_BAUD_RATE 115200
#define MY_WIFI_SSID "XXX"
#define MY_WIFI_PASSWORD "YYY"
#define MY_MQTT_CLIENT_ID "esp-lightsensor"
#define MY_MQTT_PUBLISH_TOPIC_PREFIX "my/" MY_MQTT_CLIENT_ID "/pub"
#define MY_MQTT_SUBSCRIBE_TOPIC_PREFIX "my/" MY_MQTT_CLIENT_ID "/sub"
#define MY_CONTROLLER_IP_ADDRESS 192, 168, 23, 8
#define MY_PORT 1883

#include <ESP8266WiFi.h>
#include <MySensors.h>
#include <Wire.h>
#include <BH1750.h>

BH1750 lightMeter;
MyMessage message (0, V_LEVEL);

void setup() {
  Wire.begin(D3, D4);
  if (lightMeter.begin(BH1750::CONTINUOUS_HIGH_RES_MODE)) {
    Serial.println(F("BH1750 Advanced begin"));
  } else {
    Serial.println(F("Error initialising BH1750"));
  }
}

void presentation() {
  sendSketchInfo("LightSensor", "1.0");
  present(0, S_LIGHT_LEVEL);
}

void loop() {
  float lux = lightMeter.readLightLevel();
  Serial.println("Measured level: " + String(lux) + " lux.");
  send(message.set((int32_t) lux));
  delay(2000);
  ESP.deepSleep(30e6);
}

```

It uses the [MySensors](https://platformio.org/lib/show/548/MySensors) library, which does most of the heavy lifting with regards to WiFi and MQTT. I use the MQTT Broker app to provide the MQTT server.

There _is_ a MySensors app for Homey, but I don’t think it’s being maintained anymore. I didn’t feel like using it, and instead opted for a quick-and-dirty solution:

- use the Virtual Devices app to create a sensor with the capability _“Helderheid/Luminance”_
- use the MQTT Client app to watch for updates from the light sensor node (it updates every 30 seconds) and set the `measure_luminance` capability of the virtual sensor device:  
 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/2X/8/835e7d467b1bbd77eb73d4cefdc379314f705e86.jpeg)

(the full topic used is `my/esp-lightsensor/pub/0/0/1/0/37`, where `my/esp-lightsensor/pub` is a sort of prefix, and the numbers are the MySensors encoding of the sensor type/data).

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_[View the full topic](https://community.homey.app/t/arduino-homeduino-met-esp8266-aansturen-pinnen-op-arduino/6265)._