MySensors Sensor

Integrates MySensors sensors into Home Assistant. See the main component for configuration instructions.

The following sensor types are supported:

MySensors version 1.4 and higher

S_TYPE	V_TYPE
S_TEMP	V_TEMP
S_HUM	V_HUM
S_BARO	V_PRESSURE, V_FORECAST
S_WIND	V_WIND, V_GUST, V_DIRECTION
S_RAIN	V_RAIN, V_RAINRATE
S_UV	V_UV
S_WEIGHT	V_WEIGHT, V_IMPEDANCE
S_POWER	V_WATT, V_KWH
S_DISTANCE	V_DISTANCE
S_LIGHT_LEVEL	V_LIGHT_LEVEL
S_IR	V_IR_RECEIVE
S_WATER	V_FLOW, V_VOLUME
S_AIR_QUALITY	V_DUST_LEVEL
S_CUSTOM	V_VAR1, V_VAR2, V_VAR3, V_VAR4, V_VAR5
S_DUST	V_DUST_LEVEL
S_SCENE_CONTROLLER	V_SCENE_ON, V_SCENE_OFF

MySensors version 1.5 and higher

S_TYPE	V_TYPE
S_COLOR_SENSOR	V_RGB
S_MULTIMETER	V_VOLTAGE, V_CURRENT, V_IMPEDANCE
S_SOUND	V_LEVEL
S_VIBRATION	V_LEVEL
S_MOISTURE	V_LEVEL
S_LIGHT_LEVEL	V_LEVEL
S_AIR_QUALITY	V_LEVEL (replaces V_DUST_LEVEL)
S_DUST	V_LEVEL (replaces V_DUST_LEVEL)

MySensors version 2.0 and higher

S_TYPE	V_TYPE
S_INFO	V_TEXT
S_GAS	V_FLOW, V_VOLUME
S_GPS	V_POSITION
S_WATER_QUALITY	V_TEMP, V_PH, V_ORP, V_EC

Custom unit of measurement

Some sensor value types are not specific for a certain sensor type. These do not have a default unit of measurement in Home Assistant. For example, the V_LEVEL type can be used for different sensor types, dust, sound, vibration etc.

By using V_UNIT_PREFIX, it’s possible to set a custom unit for any sensor. The string value that is sent for V_UNIT_PREFIX will be used in preference to any other unit of measurement, for the defined sensors. V_UNIT_PREFIX can’t be used as a standalone sensor value type. Sending a supported value type and value from the tables above is also required. V_UNIT_PREFIX is available with MySensors version 1.5 and later.

For more information, visit the serial api of MySensors.

MySensors 1.5 example sketch

/**
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * http://www.mysensors.org/build/light
 */

#include <SPI.h>
#include <MySensor.h>  
#include <BH1750.h>
#include <Wire.h>

#define SN "LightLuxSensor"
#define SV "1.0"
#define CHILD_ID 1
unsigned long SLEEP_TIME = 30000; // Sleep time between reads (in milliseconds)

BH1750 lightSensor;
MySensor gw;
MyMessage msg(CHILD_ID, V_LEVEL);
MyMessage msgPrefix(CHILD_ID, V_UNIT_PREFIX);  // Custom unit message.
uint16_t lastlux = 0;

void setup()  
{
  gw.begin();
  gw.sendSketchInfo(SN, SV);
  gw.present(CHILD_ID, S_LIGHT_LEVEL);
  lightSensor.begin();
  gw.send(msg.set(lastlux));
  gw.send(msgPrefix.set("lux"));  // Set custom unit.
}

void loop()      
{     
  uint16_t lux = lightSensor.readLightLevel();  // Get Lux value
  if (lux != lastlux) {
      gw.send(msg.set(lux));
      lastlux = lux;
  }

  gw.sleep(SLEEP_TIME);
}

MySensors 2.x example sketch

/**
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * http://www.mysensors.org/build/light
 */

#define MY_DEBUG
#define MY_RADIO_NRF24

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

#define SN "LightLuxSensor"
#define SV "1.0"
#define CHILD_ID 1
unsigned long SLEEP_TIME = 30000; // Sleep time between reads (in milliseconds)

BH1750 lightSensor;
MyMessage msg(CHILD_ID, V_LEVEL);
MyMessage msgPrefix(CHILD_ID, V_UNIT_PREFIX);  // Custom unit message.
uint16_t lastlux = 0;
bool initialValueSent = false;

void setup()
{
  sendSketchInfo(SN, SV);
  present(CHILD_ID, S_LIGHT_LEVEL);
  lightSensor.begin();
}

void loop()
{
  if (!initialValueSent) {
    Serial.println("Sending initial value");
    send(msgPrefix.set("custom_lux"));  // Set custom unit.
    send(msg.set(lastlux));
    Serial.println("Requesting initial value from controller");
    request(CHILD_ID, V_LEVEL);
    wait(2000, C_SET, V_LEVEL);
  }
  uint16_t lux = lightSensor.readLightLevel();  // Get Lux value
  if (lux != lastlux) {
      send(msg.set(lux));
      lastlux = lux;
  }

  sleep(SLEEP_TIME);
}

void receive(const MyMessage &message) {
  if (message.type == V_LEVEL) {
    if (!initialValueSent) {
      Serial.println("Receiving initial value from controller");
      initialValueSent = true;
    }
  }
}