Reply to Ultrasonic Distance Unit (RCWL-9600) on Wed, 28 Apr 2021 17:01:45 GMT

antimix — Wed, 28 Apr 2021 17:01:45 GMT

Hello,
the RCWL-9600 is very accurate.
You may read the data using a simple function like this:

#define M5_I2C_ADDR_ULTRA 0x57

float ReadI2CDistance()
{
uint32_t data;

Wire.beginTransmission(M5_I2C_ADDR_ULTRA);
Wire.write(0x01);
Wire.endTransmission();
delay(120);
Wire.requestFrom(M5_I2C_ADDR_ULTRA,3);
data  = Wire.read();data <<= 8;
data |= Wire.read();data <<= 8;
data |= Wire.read();
return float(data) / 10000;  // distance in cm

}