The RAK12022 WisBlock PT100 Temperature IO Module adds high-accuracy temperature measurement capability to WisBlock systems by connecting to external PT100 platinum resistance probes.
Built around the MAX31865 resistance-to-digital converter, it supports 2-, 3-, and 4-wire PT100 sensors and provides fast, stable readings through an SPI interface.
The module delivers 15-bit digital output with nominal resolution of 0.03125 °C and system accuracy up to ±0.5 °C, ensuring reliable industrial and laboratory performance.
Two shorting jumpers are included to configure the module for different PT100 wiring modes.
Compact and efficient, it’s a robust solution for integrating high-precision temperature inputs into any WisBlock design.
Key Features
Based on MAX31865 RTD-to-digital converter
Supports 2-, 3-, and 4-wire PT100 probe configurations
SPI interface for accurate, low-noise communication
15-bit ADC resolution (≈ 0.03125 °C)
Accuracy ±0.5 °C max (0.05 % FS)
Fully differential reference inputs for improved stability
Conversion time ≤ 21 ms
Operates from 3.3 V supply
Compact 25 × 35 mm module
Industrial temperature range: –40 °C to +85 °C
Ideal For
Adding PT100 temperature measurement capability to WisBlock systems
Industrial process monitoring and control
Environmental and climate data logging
Laboratory and calibration instrumentation
Custom enclosures and embedded designs requiring RTD inputs
📌 Important Note:
This product is the IO module only and does not include a PT100 sensor. A version with a PT100 sensor included is available here.
When combined with a WisBlock Core (such as RAK4631), this module enables real-time temperature measurement and wireless communication over LoRaWAN®, LoRa® point-to-point, or BLE.
WisBlock PT100 Temperature IO Module – RAK12022 MAX31865
The RAK12022 WisBlock PT100 Temperature IO Module enables precise measurement from external PT100 probes using the MAX31865 RTD-to-digital converter.
