I have exactly the same problem. My code is below, To see the problem uncomment the first line in <loop> void setup() { Serial.begin(115200); Wire.begin(); delay(3000); Serial.println("\n\n\n\n\n\n\n\n\n\n"); I2C_scan(); delay(3000); am2320.begin(); Serial.println("Checking DS1307 Temperature / Humi...