RAKwireless RAK1901 WisBlock Sensor - SHTC3 Air Temperature and Humidity Sensor

Product detailed description

RAKwireless RAK1901 is an air temperature and humidity sensor module for the WisBlock modular system, equipped with a Sensirion SHTC3 chip. It measures temperature with a typical accuracy of ±0.2 °C and relative humidity with an accuracy of ±2 % RH, while drawing only 0.3 µA in sleep mode. The module plugs without soldering into any sensor slot of the WisBlock base board, and data is read via the I²C bus. Thanks to its minimal power consumption, it is suitable for battery-powered weather stations, LoRaWAN nodes, and monitoring greenhouses, server rooms, cellars, and warehouses, where the device needs to run for months without a battery change.

Specifications:

• Sensor: Sensirion SHTC3
• Interface: I²C (I2C1_SDA / I2C1_SCL), address 0x70
• Power Supply: 1.6 – 3.6 V DC (nominally 3.3 V from the WisBlock base board)
• Temperature:
  • Range: −40 °C to +125 °C
  • Accuracy: ±0.2 °C (typ.)
• Humidity:
  • Range: 0 – 100 % RH
  • Accuracy: ±2 % RH (typ.)
• Power consumption:
  • Measurement, Normal Mode: approx. 430 µA
  • Measurement, Power-Saving Mode: approx. 270 µA
  • Sleep: 0.3 µA
• WisBlock Placement: sensor slot A, B, C, D, E or F
• Dimensions: 10 × 10 mm
• Libraries: Adafruit SHTC3 or ClosedCube SHTC3 (Arduino), also supported in RUI3

What you need for the module:

• WisBlock motherboard:
  • RAKwireless RAK19007 WisBlock Base Board 2nd Generation, USB-C, LoRa/IoT
  • RAKwireless RAK19003 WisBlock Mini Base Board, USB-C, LoRa/IoT
• WisBlock Core processor module:
  • RAKwireless RAK4631 WisBlock Core, nRF52840 SX1262, LoRa/BLE module for LoRaWAN and Meshtastic
• Or a complete ready-to-use kit:
  • WisBlock Meshtastic Starter Kit

Package contents:

• 1× RAK1901 SHTC3 module

Note:

• The sensor itself is not a functional device – it requires a WisBlock base board and a WisBlock Core processor module.
• The SHTC3 chip may drift during long-term operation in humid conditions. If you are measuring above 80 % RH continuously, allow the sensor to dry out occasionally in a dry environment.
• This product is not a standalone functional unit and may require professional installation.
• Product images are for illustrative purposes only and may sometimes differ from the actual appearance of the item. However, this does not change their basic properties.