Next steps shows how the master (Arduino) reads from the slave I2C device. Wire.requestFrom(address, 1) command expects to receive 1 byte of data from the TC74 sensor. Wire.available() waits for data ...

Nice method and analysis. The temp sensor 3 pin devices are simple and cheap but good for 0.5 deg C precision or nearly a full degree in human measure.

– The MCP9800 temperature sensor is used for cold junction compensation. – The MCP3424 analog-to-digital converter measures the voltage produced by each thermocouple. – The DS3231 real time ...