Well i did it... i've got a working MYSENSOR with DHT12...
here the Code ... its not nice but it works...
// Enable debug prints
#define MY_DEBUG
// Define Node ID
#define MY_NODE_ID 128
//#define MY_REPEATER_FEATURE
// Enable and select radio type attached
#define MY_RADIO_NRF24
#include <SPI.h>
#include <MySensors.h>
#include <DHT12.h>
#include <Wire.h>
DHT12 dht12;
#define SENSOR_TEMP_OFFSET 0
// Sleep time between sensor updates (in milliseconds)
// Must be >1000ms for DHT22 and >2000ms for DHT11
static const uint64_t UPDATE_INTERVAL = 30000;
static const uint8_t FORCE_UPDATE_N_READS = 10;
#define CHILD_ID_HUM 0
#define CHILD_ID_TEMP 1
float lastTemp;
float lastHum;
uint8_t nNoUpdatesTemp;
uint8_t nNoUpdatesHum;
bool metric = true;
MyMessage msgHum(CHILD_ID_HUM, V_HUM);
MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
void presentation()
{
// Send the sketch version information to the gateway
sendSketchInfo("DHT12", "1.1");
// Register all sensors to gw (they will be created as child devices)
present(CHILD_ID_HUM, S_HUM);
present(CHILD_ID_TEMP, S_TEMP);
//metric = getControllerConfig().isMetric;
}
void setup()
{
Wire.begin();
}
void loop()
{
// Force reading sensor, so it works also after sleep()
//dht12.readSensor(true);
// Get temperature from DHT library
float temperature = dht12.readTemperature();
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;
// apply the offset before converting to something different than Celsius degrees
temperature += SENSOR_TEMP_OFFSET;
if (!metric) {
temperature = dht12.readTemperature();
}
// Reset no updates counter
nNoUpdatesTemp = 0;
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 = dht12.readHumidity();
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);
//wait(UPDATE_INTERVAL); //for repeaters
}
i Used this library: https://github.com/Bobadas/DHT12_library_Arduino/blob/master/README.md
here the datasheet of the dht12: http://www.robototehnika.ru/file/DHT12.pdf
