This I2C digital temperature sensor is one of the more accurate/precise we’ve ever seen, with a typical accuracy of 0.25 Degree C over the sensor’s -40 Degree C to +125 Degree C range and precision of +0.0625 Degree C. They work great with any microcontroller using standard i2c. There are 3 address pins so you can connect up to 8 to a single I2C bus without address collisions. Best of all, a wide voltage range makes is usable with 2.7V to 5.5V logic!