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The Duet WiFi and Duet Ethernet both support up to two MAX31865-based daughter boards. Each daughter board supports two PT100 temperature sensors:

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Versions of the board before v1.1 had solder jumpers to convert from 2 wire to 4 wire. From version 1.1 on wards there are two jumpers per input channel. With the jumpers on the board expects a 2 wire PT100 sensor. With the jumpers off a 4 wire PT100 sensor can be used.

A total of two temperature sensor daughter boards (PT100 or Thermocouple) are supported on the DuetWifi, with a further 2 on the Duex2 or Duex5 bringing the total number of digital temperature inputs to 8.

For setting up the Duet us use PT100 sensors see: Connecting PT100 temperature sensors

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