The terminal comprises the following main functional blocks:
The MCU communicates with external analog or digital equipment (it depends on the software), detects events and can function in two modes: acquisition mode and transmission mode. In acquisition mode the MCU stores data in memory and sends them from time to time according to external requests. In transmission mode the MCU sends data immediately.
In any mode the MCU sends the data to the transceiver. The last sends the data to a next system node or a central data collection unit (it depends on the system structure). The MCU can be waken by the transceiver if the last receives a special awakening sequence being in wake-on-radio mode. The transceiver works in a 869 MHz frequency band at up to 26 mW output power level.
After sending data both the transceiver and the MCU switches into sleep mode (or WOR mode for transceiver).
So the terminal reaches very low power consumption and can work continuously up to 10 years.
The antenna is connected to the internal coaxial socket (SMB) with an antenna cable. The antenna and interface cables are passed through cable glands.
The MCU utilizes an STM32F10x controller. The transceiver utilizes a TI CC1101 chip.
The terminal is packed into a die-cast aluminium enclosure (IP67). The terminal prototype is shown at the picture below.
Questions and comments please send via page "Contacts".