💬 Sonoff relay using MySensors ESP8266 wifi or mqtt gateway

gohan

I think it's because the gnd on the sonoff is shared with neutral from the mains. I have seen pictures of burned stuff but I actually never wanted to try to see if the computer gets fried or not 😁

Nca78

@gohan yes with it could happen, but if you just connect a standalone Arduino powered with VCC GND from esp8266 there's no reason to have a problem.

gohan

But why would you want to connect another arduino to the sonoff?

betonishard

@Ed1500 Thanks for your answer. Went for espurna.. Tested tasmota, but compared to espurna it was kind of slow. Works stable for quite some time now.

Ed1500

@betonishard Good to know. I was thinking about trying Tasmota for regular Sonoff, but I will keep slowness in mind

Nca78

@gohan said in 💬 Sonoff relay using MySensors ESP8266 wifi or mqtt gateway:

But why would you want to connect another arduino to the sonoff?

To have a real MySensors node that can be directly controlled with another node and not relying on wifi and controller.

gohan

Sorry but I am still missing the point. If you have to make a mysensors node anyway, why not make a classic relay node?

Nca78

@gohan because when using the sonoff I do not have to care about the power supply/safety, to find a case that is safe for electrical device and I only have a few things to solder.
And sonoff is cheaper than buying separately the power supply, case, relay etc

So just solder a few low voltage components on a PCB, plug in the sonoff and get a safe main powered actuator.

Not 100% sure it's worth it yet, still thinking a out it ;)
But main advantage is to reuse it in more complex sonoff devices with multiple relays, power measurement, in wall plugs etc etc

gohan

Once you come up with something I'll take a look to better understand what you want to do 😀
I have seen how to hack some of them to add a couple of wires directly on the esp8266 chip to get an i2c bus.

Jonathan Caes

How can I create a new device in Vera for a gateway? Can't seem to get that working :/

Jonathan Caes

@efflon Do you know how I can setup the sonoff gateway on the Vera Edge? I used the MySensors plugin to add the sonoff to the network but can't get the relay to toggle.. :/ Help is much appreciated!! Thanks!!

tkald

If someone wants, I create a modification to cooperate with DHT22. Data pin of DHT22 is connected to pin 5 of sonoff.

/**
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 * REVISION HISTORY
 * Version 1.0 - Henrik EKblad
 * Contribution by a-lurker and Anticimex,
 * Contribution by Norbert Truchsess <norbert.truchsess@t-online.de>
 * Contribution by Ivo Pullens (ESP8266 support)
 *
 * DESCRIPTION
 * The EthernetGateway sends data received from sensors to the WiFi link.
 * The gateway also accepts input on ethernet interface, which is then sent out to the radio network.
 *
 * VERA CONFIGURATION:
 * Enter "ip-number:port" in the ip-field of the Arduino GW device. This will temporarily override any serial configuration for the Vera plugin.
 * E.g. If you want to use the defualt values in this sketch enter: 192.168.178.66:5003
 *
 * LED purposes:
 * - To use the feature, uncomment any of the MY_DEFAULT_xx_LED_PINs in your sketch, only the LEDs that is defined is used.
 * - RX (green) - blink fast on radio message recieved. In inclusion mode will blink fast only on presentation recieved
 * - TX (yellow) - blink fast on radio message transmitted. In inclusion mode will blink slowly
 * - ERR (red) - fast blink on error during transmission error or recieve crc error
 *
 * See http://www.mysensors.org/build/esp8266_gateway for wiring instructions.
 * nRF24L01+  ESP8266
 * VCC        VCC
 * CE         GPIO4
 * CSN/CS     GPIO15
 * SCK        GPIO14
 * MISO       GPIO12
 * MOSI       GPIO13
 * GND        GND
 *
 * Not all ESP8266 modules have all pins available on their external interface.
 * This code has been tested on an ESP-12 module.
 * The ESP8266 requires a certain pin configuration to download code, and another one to run code:
 * - Connect REST (reset) via 10K pullup resistor to VCC, and via switch to GND ('reset switch')
 * - Connect GPIO15 via 10K pulldown resistor to GND
 * - Connect CH_PD via 10K resistor to VCC
 * - Connect GPIO2 via 10K resistor to VCC
 * - Connect GPIO0 via 10K resistor to VCC, and via switch to GND ('bootload switch')
 *
  * Inclusion mode button:
 * - Connect GPIO5 via switch to GND ('inclusion switch')
 *
 * Hardware SHA204 signing is currently not supported!
 *
 * Make sure to fill in your ssid and WiFi password below for ssid & pass.
 */

/**
 * Sonoff specific details (IM15116002)
 * 
 * The sonoff header left to right, relay above, LED below.
 *  [1]  vcc 3v3
 *   2   rx
 *   3   tx
 *   4   gnd
 *   5   
 *   
 * In arduinoIDE 1.6.* choose Generic ESP8226 module.
 * Hold Sonoff button when attaching FTDI to flash.
 */

// Enable debug prints to serial monitor
#define MY_DEBUG

// Use a bit lower baudrate for serial prints on ESP8266 than default in MyConfig.h
#define MY_BAUD_RATE 9600

// No radio in Sonoff
// Enables and select radio type (if attached)
// #define MY_RADIO_NRF24
// #define MY_RADIO_RFM69

#define MY_GATEWAY_ESP8266

#define MY_ESP8266_SSID "wifissid"
#define MY_ESP8266_PASSWORD "wifipassword"

// Enable UDP communication
//#define MY_USE_UDP

// Set the hostname for the WiFi Client. This is the hostname
// it will pass to the DHCP server if not static.
// #define MY_ESP8266_HOSTNAME "sensor-gateway"

// Enable MY_IP_ADDRESS here if you want a static ip address (no DHCP)
#define MY_IP_ADDRESS 192,168,2,200

// If using static ip you need to define Gateway and Subnet address as well
#define MY_IP_GATEWAY_ADDRESS 192,168,2,1
#define MY_IP_SUBNET_ADDRESS 255,255,255,0

// The port to keep open on node server mode
#define MY_PORT 5003

// How many clients should be able to connect to this gateway (default 1)
#define MY_GATEWAY_MAX_CLIENTS 1

// Controller ip address. Enables client mode (default is "server" mode).
// Also enable this if MY_USE_UDP is used and you want sensor data sent somewhere.
// #define MY_CONTROLLER_IP_ADDRESS 192, 168, 178, 68

/*
// Enable inclusion mode
#define MY_INCLUSION_MODE_FEATURE

// Enable Inclusion mode button on gateway
// #define MY_INCLUSION_BUTTON_FEATURE
// Set inclusion mode duration (in seconds)
#define MY_INCLUSION_MODE_DURATION 60
// Digital pin used for inclusion mode button
#define MY_INCLUSION_MODE_BUTTON_PIN  3


// Set blinking period
// #define MY_DEFAULT_LED_BLINK_PERIOD 300

// Flash leds on rx/tx/err
// Led pins used if blinking feature is enabled above
#define MY_DEFAULT_ERR_LED_PIN 16  // Error led pin
#define MY_DEFAULT_RX_LED_PIN  16  // Receive led pin
#define MY_DEFAULT_TX_LED_PIN  16  // the PCB, on board LED
*/

#if defined(MY_USE_UDP)
#include <WiFiUdp.h>
#endif

#include <ESP8266WiFi.h>
#include <MySensors.h>
#include <Bounce2.h>
#include <SPI.h>
#include <DHT.h>

#define BUTTON_PIN 0  // Sonoff pin number for button
#define RELAY_PIN 12  // Sonoff pin number for relay 
#define LED_PIN 13    // Sonoff pin number for LED
#define RELAY_ON 1
#define RELAY_OFF 0
#define LED_ON 0
#define LED_OFF 1
#define DHT_DATA_PIN 14
#define SENSOR_TEMP_OFFSET 0
static const uint64_t UPDATE_INTERVAL = 5000;
static const uint8_t FORCE_UPDATE_N_READS = 10;
unsigned long SLEEP_TIME = 5000; // Sleep time between reads (in milliseconds)
unsigned long lastRefreshTime = 0; // Use this to implement a non-blocking delay function

// Id of the sensor child
// Set unique id for each sonoff if sub/pub on same mqtt topic
#define CHILD_ID 0
#define CHILD_ID_HUM 1
#define CHILD_ID_TEMP 2

float lastTemp;
float lastHum;
uint8_t nNoUpdatesTemp;
uint8_t nNoUpdatesHum;
bool metric = true;

MyMessage msg(CHILD_ID,V_STATUS);
MyMessage msgHum(CHILD_ID_HUM, V_HUM);
MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
DHT dht;

Bounce debouncer = Bounce(); 
int oldValue = 0;
bool state = false;



void setup()  
{  
  // Setup the button
  pinMode(BUTTON_PIN, INPUT_PULLUP);

  // After setting up the button, setup debouncer
  debouncer.attach(BUTTON_PIN);
  debouncer.interval(5);

  // Make sure relays and LED are off when starting up
  digitalWrite(RELAY_PIN, RELAY_OFF);
  digitalWrite(LED_PIN, LED_OFF);

  // Then set relay pins in output mode
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);

  dht.setup(DHT_DATA_PIN); // set data pin of DHT sensor
  if (UPDATE_INTERVAL <= dht.getMinimumSamplingPeriod()) {
    Serial.println("Warning: UPDATE_INTERVAL is smaller than supported by the sensor!");
  }
  // Sleep for the time of the minimum sampling period to give the sensor time to power up
  // (otherwise, timeout errors might occure for the first reading)
  sleep(dht.getMinimumSamplingPeriod());
   
}

void presentation()  {
  // Send the sketch version information
  sendSketchInfo("Sonoff ethernet DHT22", "1.0");
  // Register sensor
  present(CHILD_ID, S_BINARY);
  present(CHILD_ID_HUM, S_HUM);
  present(CHILD_ID_TEMP, S_TEMP);
  metric = getControllerConfig().isMetric;
  // Send the current state
  send(msg.set(state?true:false));
  // Blink when ready
  blink();
}


void loop()
{
  debouncer.update();
  // Get the update value
  int value = debouncer.read();
  if (value != oldValue && value==0) {
    // Toggle the state
    state = state?false:true;
    // Change relay state
    digitalWrite(RELAY_PIN, state?RELAY_ON:RELAY_OFF);
    // Change LED state
    digitalWrite(LED_PIN, state?LED_ON:LED_OFF);
    // Send new state
    send(msg.set(state)); 
  }
  oldValue = value;

  boolean needRefresh = (millis() - lastRefreshTime) > SLEEP_TIME;
  if (needRefresh)
  {
      lastRefreshTime = millis();
      
  // Force reading sensor, so it works also after sleep()
  dht.readSensor(true);

  // Get temperature from DHT library
  float temperature = dht.getTemperature();
  if (isnan(temperature)) {
    Serial.println("Failed reading temperature from DHT!");
  } else if (temperature != lastTemp || nNoUpdatesTemp == FORCE_UPDATE_N_READS) {
    // Only send temperature if it changed since the last measurement or if we didn't send an update for n times
    lastTemp = temperature;
    if (!metric) {
      temperature = dht.toFahrenheit(temperature);
    }
    // Reset no updates counter
    nNoUpdatesTemp = 0;
    temperature += SENSOR_TEMP_OFFSET;
    send(msgTemp.set(temperature, 1));

    #ifdef MY_DEBUG
    Serial.print("T: ");
    Serial.println(temperature);
    #endif
  } else {
    // Increase no update counter if the temperature stayed the same
    nNoUpdatesTemp++;
  }

  // Get humidity from DHT library
  float humidity = dht.getHumidity();
  if (isnan(humidity)) {
    Serial.println("Failed reading humidity from DHT");
  } else if (humidity != lastHum || nNoUpdatesHum == FORCE_UPDATE_N_READS) {
    // Only send humidity if it changed since the last measurement or if we didn't send an update for n times
    lastHum = humidity;
    // Reset no updates counter
    nNoUpdatesHum = 0;
    send(msgHum.set(humidity, 1));

    #ifdef MY_DEBUG
    Serial.print("H: ");
    Serial.println(humidity);
    #endif
  } else {
    // Increase no update counter if the humidity stayed the same
    nNoUpdatesHum++;
  }
}
  // Sleep for a while to save energy
  //sleep(UPDATE_INTERVAL); 
}

void receive(const MyMessage &message)
{
  // We only react on status messages from the controller
  // to this CHILD_ID.
  if (message.type==V_STATUS  && message.sensor==CHILD_ID) {
    // Change relay state
    // Only switch if the state is new
    if (message.getBool() != state) {
      state = message.getBool();
      // Change relay state
      digitalWrite(RELAY_PIN, state?RELAY_ON:RELAY_OFF);
      // Change LED state
      digitalWrite(LED_PIN, state?LED_ON:LED_OFF);
       // Send the current state
      send(msg.set(state));  
    }
  }
}

void blink()
{
  digitalWrite(LED_PIN, digitalRead(LED_PIN)?LED_ON:LED_OFF);
  wait(200);
  digitalWrite(LED_PIN, digitalRead(LED_PIN)?LED_ON:LED_OFF);
  wait(200);
  digitalWrite(LED_PIN, digitalRead(LED_PIN)?LED_ON:LED_OFF);
  wait(200);
  digitalWrite(LED_PIN, digitalRead(LED_PIN)?LED_ON:LED_OFF);
}

Morten Mathiasen

I think it is an easier and more general solution to use https://github.com/arendst/Sonoff-Tasmota

gohan

@Morten-Mathiasen that is the one I'm using on my sonoff pow

dbemowsk

@Jonathan-Caes said in 💬 Sonoff relay using MySensors ESP8266 wifi or mqtt gateway:

Do you know how I can setup the sonoff gateway on the Vera Edge?

I am using a Vera Plus. I did not go the route of MySensors for my Sonoffs. I use the ESP Easy firmware with a slightly modified Vera plugin. Here is my BLOG post on how to do it.
https://dan.bemowski.info/2017/07/04/using-a-sonoff-with-espeasy-and-vera/

You could still go the MySensors route. I just figured I'd show another alternative to this.

Jan Gatzke

It's a shame that we cannot have both, mysensors and the ESP Easy stuff. There has been a project for this: https://github.com/letscontrolit/ESPEasyMySensors :disappointed_relieved:

dbemowsk

@Jan-Gatzke It is my understanding that ESP Easy can send and receive MQTT messages, couldn't you just use a MySensors MQTT gateway if you wanted to keep it on the MySensors path?

Jan Gatzke

@dbemowsk You cannot because MQTT is just a transport and not a strict data format. You can however use MySenSors MQTT + ESP Easy MQTT + a broker + node red + a controller. Node Red can do data conversions and integrate everything.

dbemowsk

@Jan-Gatzke I was just speculating. I do not use MQTT, so I am by no means an authority on the subject.

gohan

@Jan-Gatzke said in 💬 Sonoff relay using MySensors ESP8266 wifi or mqtt gateway:

It's a shame that we cannot have both, mysensors and the ESP Easy stuff. There has been a project for this: https://github.com/letscontrolit/ESPEasyMySensors :disappointed_relieved:

There is no real benefit to have the sonoff running mysensors instead of other firmwares, if your controller is able to communicate over mqtt to switch on/off the relay, you are fine

💬 Sonoff relay using MySensors ESP8266 wifi or mqtt gateway

13

11.7k

11.2k

113.1k