Energy Harvesting Wireless Temperature Sensor Module 868 MHz
Manufactured By:ENOCEAN
Part Number:STM 330
The extremely power saving RF transmitter module family STM 33x of EnOcean is optimized for realization of wireless and maintenance free temperature sensors, or room operating panels including set point dial and occupancy button. It requires only a minimum number of external components and provides an integrated and calibrated temperature sensor. Power supply is provided by a small pre-installed solar cell, an external energy harvester, or an external 3 V backup battery. An energy storage element is installed in order to bridge periods with no supply from the energy harvester. The module provides a user configurable cyclic wake up.
After wake up, the internal microcontroller reads the status of the temperature sensor and optional set point dial. A radio telegram will be transmitted in case of a significant change of measured temperature or set point values or if the external occupancy button is pressed. In case of no relevant input change, a redundant retransmission signal is sent after a user configurable number of wake-ups to announce all current values. In addition to the cyclic wake-up, a wake up can be triggered externally using the input for the occupancy button or the internal LRN button. Additionally the STM 330 and STM 331 in 868 MHz include the enhanced secure mode. In enhanced secure mode the communication is protected by enhanced security features e.g. encryption. The modules can be switched from standard mode (without enhanced security) to enhanced mode and back by long press of LRN button also in field operation. The firmware can be configured to use different EEPs according to the availability set point dial and occupancy button.
After wake up, the internal microcontroller reads the status of the temperature sensor and optional set point dial. A radio telegram will be transmitted in case of a significant change of measured temperature or set point values or if the external occupancy button is pressed. In case of no relevant input change, a redundant retransmission signal is sent after a user configurable number of wake-ups to announce all current values. In addition to the cyclic wake-up, a wake up can be triggered externally using the input for the occupancy button or the internal LRN button. Additionally the STM 330 and STM 331 in 868 MHz include the enhanced secure mode. In enhanced secure mode the communication is protected by enhanced security features e.g. encryption. The modules can be switched from standard mode (without enhanced security) to enhanced mode and back by long press of LRN button also in field operation. The firmware can be configured to use different EEPs according to the availability set point dial and occupancy button.
Applications
- Building Automation
- Industrial
Features
- Frequency 868.3 MHz
- Measurement range 0-40°C, resolution 0.16K
- Accuracy typ. ±1K
- Pre-installed solar cell
- Pre-installed whip antenna
- 125 kbps Data rate
- ASK Modulation
Ships With
- STM 330 Board