how to read i2c with esp32 NodeMCU
Posted: Wed Nov 11, 2020 2:49 pm
I'm trying to read the i2c data from a scl30 sensor co2, but the esp32 don't doing anything, I'm write the sketch with Arduino IDE, how can I read sda y scl for gpio34 and gpio35 pins? The sensor works with an arduino and, with esp32 the power supply it's on, I see the infrared ligth but when I try to read the data the serial monitor it's empty and not recive data. What can I do? Thanks in advance
Code: Select all
#include <Wire.h>
#include "SparkFun_SCD30_Arduino_Library.h" //Click here to get the library: http://librarymanager/All#SparkFun_SCD30
SCD30 airSensor;
void setup()
{
Serial.begin(115200);
Serial.println("SCD30 Example");
Wire.begin(35,34, 1000000);
if (airSensor.begin() == false)
{
Serial.println("Air sensor not detected. Please check wiring. Freezing...");
while (1)
;
}
//The SCD30 has data ready every two seconds
}
void loop()
{
if (airSensor.dataAvailable())
{
Serial.print("co2(ppm):");
Serial.print(airSensor.getCO2());
Serial.print(" temp(C):");
Serial.print(airSensor.getTemperature(), 1);
Serial.print(" humidity(%):");
Serial.print(airSensor.getHumidity(), 1);
Serial.println();
}
else
Serial.println("Waiting for new data");
delay(500);
}