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);
}