General
Temperature accuracy	±2,0 °C
Humidity range	0 to 100 % RH
Humidity accuracy	±2,0 % RH
System compatibility	WisBlock system
Module size	small

The RAK1901 is a WisBlock sensor from RAK Wireless, specifically developed for capturing temperature and humidity data in IoT environments. The module integrates the Sensirion SHTC3 sensor, designed for high measurement accuracy and reliability in various environments. It serves as an extension of the WisBlock system and enables quick integration into existing or newly built IoT applications. The use of a ready-to-use software library and a tutorial simplifies the setup and programming of the sensor. The captured data can be transmitted via various communication protocols, including LoRaWAN®, LoRa® point-to-point connections, and Bluetooth Low Energy (BLE). Due to its low power consumption, the RAK1901 is particularly suitable for battery-powered applications. The WisBlock system also allows for complete shutdown of the module to further minimize energy consumption.

Applications

The RAK1901 is suitable for a wide range of applications in environmental monitoring and industrial automation. The temperature range of -40 to +125 °C enables use in extreme environments, such as in cooling systems, industrial processes, or outdoor settings. The humidity measurement range of 0 to 100 % RH also makes the module suitable for indoor applications, greenhouses, or warehouses. In combination with other WisBlock sensors, such as the barometric pressure sensor RAK1902, the module can become part of a comprehensive weather station or environmental monitoring system.

Functions and Features in Detail

The module offers a temperature accuracy of ±2.0 °C and a humidity accuracy of ±2.0 % RH, which is sufficient for most industrial and commercial applications. The sensor is compact and features a small form factor, making it suitable for use in limited space conditions. Integration is achieved via the WisBlock module system, which enables modular expansion of IoT devices. Data transmission occurs through integrated interfaces, with the choice of communication protocol depending on the application and network environment.

Technology Explained Simply

The RAK1901 uses the SHTC3 sensor from Sensirion, known for its high accuracy and stability. The measurement values are output digitally, ensuring high reliability and low susceptibility to interference. Power supply is provided through the WisBlock system, and the module’s low power consumption extends battery life in mobile or remote applications. The ability to fully power off the module enables additional energy savings, especially in scenarios with intermittent operation.

Compatibility and Accessories

The RAK1901 is specifically designed for use with the WisBlock system. It can be directly connected to the WisBlock Core RAK4631(H) to form a complete IoT system for environmental data collection. Further compatibility includes use with other WisBlock modules such as the barometric pressure sensor RAK1902, the GNSS module RAK1910, or the environmental sensor RAK1906. Combining it with interface modules like the Wi-Fi module RAK2305 or the RS485 module RAK5802 extends the system’s functionality. The module is part of a comprehensive ecosystem that allows flexible adaptation to different requirements.

Mounting and Installation

Mounting is done via the WisBlock module system, which enables both mechanical and electrical connections between modules. Installation requires no special tools, as modules are connected via plug-in connections. Software integration is facilitated by the provided library and tutorial, enabling quick setup. Communication settings can be configured according to the application via the respective protocols.

Operational Advantages

The RAK1901 offers high measurement accuracy with low power consumption, making it particularly suitable for energy-efficient IoT applications. The modular design of the WisBlock system allows flexible expansion and adaptation to specific requirements. Support for multiple communication protocols increases flexibility in network integration. Combining it with other WisBlock modules enables the creation of complex, networked systems for environmental and process monitoring.