Previously I had pined the temp/hum sensor HDC1080 with an Arduino using this sketch and everything worked fine. Now I want to run it over an ESP-12F, I uploaded it but it has issues at the time of establishing I2C connection. Basically, I'm not sure if at the end of setup() the I2C connection has actually begun, because I get this at the serial monitor:
As far as I see, the code skips everything related to Wire library. I blame it on the SDA/SCL pins, but actually none of the pins are working for me. I found that default I2C GPIO's are 2 and 14, I tried with them and got no result; later I tried with 12/16, as the commented Wire.begin line says, but it was the same. I even read some possible solutions in this post but I not even have the mentioned libraries.
Could you give me any suggestion, please? This is the sketch I'm using:
#include <Wire.h>
#define HDC 0x40 //B1000000 MSB
#define cociente 65536 //2^16
uint16_t humrawvalue; //Raw data value, MS byte = valmsb, LS byte = vallsb
uint16_t temrawvalue; //Raw data value, MS byte = valmsb, LS byte = vallsb
uint8_t humvalmsb, humvallsb; //Raw 8-bit byte of humidity
uint8_t temvalmsb, temvallsb; //Raw 8-bit byte of temperature
int incomingByte = 0; //Action input
float humidity, temperature;
void setup() {
delay(100);
Serial.begin(9600);
delay(100);
Serial.println("Hello");
//Wire.begin(12,16);
Wire.begin();
Wire.setClockStretchLimit(1500);
}
void loop() {
if (Serial.available() > 0) { //User presses 1 to start sensor reading
// read the incoming byte:
incomingByte = Serial.read();
yield();
// say what you got:
Serial.print("I received: ");
Serial.println(incomingByte, DEC);
}
Serial.println("---g-"); //Just guideline
if (incomingByte == 49){
Serial.println("IIIII"); //Just guideline
Wire.beginTransmission(HDC);
Wire.write(0x00);
Wire.endTransmission(true);
delay(200);
Wire.requestFrom(HDC,4,true); //It asks for 4 bytes, 2 bytes per register
if(Wire.available()){
Serial.println(" ");
Serial.println("Measuring: ");
temvalmsb = Wire.read();
temvallsb = Wire.read();
humvalmsb = Wire.read();
humvallsb = Wire.read();
Serial.println("====TEMPERATURE====");
Serial.print("MSB: "); Serial.println(temvalmsb, BIN);
Serial.print("LSB: "); Serial.println(temvallsb, BIN);
temrawvalue = temvalmsb <<8| temvallsb; //Locates each byte in its proper place
Serial.print("Temp: "); Serial.println(temrawvalue, BIN);
temperature = ((float)temrawvalue/(float)cociente)*165.0-40.0;
Serial.print("Temperatura [C]: "); Serial.println(temperature);
Serial.println("====HUMIDITY====");
Serial.print("MSB: "); Serial.println(humvalmsb, BIN);
Serial.print("LSB: "); Serial.println(humvallsb, BIN);
humrawvalue = humvalmsb <<8| humvallsb;
Serial.print("Hum: "); Serial.println(humrawvalue, BIN);
humidity = ((float)humrawvalue/(float)cociente)*100.0;
Serial.print("Humidity [%]: "); Serial.println(humidity);
Serial.println(" ");
delay(3000);
}
}
Serial.println("++++"); //Just guideline
delay(3000);
}
Regards!
