MAX31855
This is an Arduino library for 14-bit MAX31855 K-thermocouple to digital converter with 12-bit cold junction compensation & maximum sampling rate about 10Hz. Supports all sensor features. Can work with hardware or software emulated 3-wire SPI.
- Maximum power supply voltage is 3.6v
- K-type thermocouples have an absolute accuracy of around ±2°C..±6°C.
- Measurement tempereture range -200°C..+700°C ±2°C or -270°C..+1372°C ±6°C with 0.25°C resolution/increment.
- Maximun SPI bus speed 5Mhz
- Cold junction compensation range -40°C..+125° ±3°C with 0.062°C resolution/increment. Optimal performance of cold junction compensation happends when the thermocouple cold junction & the MAX31855 are at the same temperature. Avoid placing heat-generating devices or components near the converter because this may produce an errors.
- It is STRONGLY recommended to add a 10nF/0.01mF capacitor, placed across the T+ and T- pins, to filter noise/false readings on the thermocouple lines.
**Library returns 2000, if thermocouple open/shorted or a communication error has occurred
Supports:
- Arduino AVR
- Arduino ESP8266
- Arduino ESP32
- Arduino STM32
Beware of a fake MAX31855 K-Thermocouple Sensor Module