Skip to content

Multiplex Wifi temperature measurement board for K-type thermocouples

Notifications You must be signed in to change notification settings


Repository files navigation

WiFi Thermocouple Multiplexer Shield

WiFi Thermocouple Multiplexer Shield

For more details, check out the product page at

MakerStorage invests time and resources providing this open source design, please support MakerStorage and open-source hardware by purchasing products from MakerStorage!

Designed by MakerStorage LLC.

Creative Commons Attribution, Share-Alike license, check for more information All text above must be included in any redistribution

This Shield is designed to easily allow multiple high-temperature readings with an ESP8266 control board. Screw terminals are provided for thermocouple connections.

  • Multiplexing seven K-type thermocouples (Can read all sensors under a second)
  • Wifi capability (example firmware for local server and Amazon AWS IoT)
  • Suitable for only Lolin models of ESP8266 (27mm between headers)
  • Onboard Max31855KASA Cold-Junction Compensated Thermocouple-to-Digital Converter
  • Works with K type thermocouples -200°C to +1350°C output in 0.25 degree increments - note that K thermocouples have about ±2°C to ±6°C accuracy

Areas to use:

  • Automotive – Engine, Exhaust and Brake temperatures

  • Ovens, Furnaces, and Kilns

  • Freezer or Cryogenic monitoring

  • Chemical Processes

  • IoT applications like Multi-Zone Temperature Monitoring, Data Acquisition or Logging Systems


Multiplex Wifi temperature measurement board for K-type thermocouples






No releases published