ZBR1 board for Raspberry Pi

ZBR1 is a Zigbee/802.15.4 based development expansion board for Raspberry Pi. Supports Zigbee/802.15.4 wireless communication.

Designed to be used alongside with Raspberry Pi 2B, 3B, 3B+ и 4B.
The 2GH-ZB board does not follow the Raspberry Pi HAT mechanical specification.

Technical features:

Built-in radio module E18-MS1PA1-IPX for Zigbee communication. The communication between the Raspberry Pi processor and the radio module is via a serial interface. The loading of a firmware into radio module is possible, by controlling 3 pins from the GPIO header. No external programming adapters are required. The radio module E18-MS1PA1-IPX is equipped with: built-in U.FL connector for connecting to an external antenna, built-in CC2530 wireless controller and CC2592 range extender with integrated PA + LNA.

In case of power failure and / or lack of internet connection, the available on the board real-time clock helps the Raspberry Pi device to keep the exact time. The communication between the Raspberry Pi processor and the clock is via the I²C interface. In case of lack of power, the clock is powered by a lithium battery CR1220 (not included in the package).

The board is equipped with a non-volatile memory, allowing to store configuration data or to implement ID EEPROM according to Raspberry Pi HAT requirements. The communication between the Raspberry Pi processor and the clock is via the I²C interface.
A button on the board allows you to implement a user function - for example, selection of modes of operation.

The three LEDs on the board show:
- LED1 - presence of supply voltage;
- LED2 - user function, e.g. operating mode;
- LED3 - user function, e.g. status of the Zigbee communication.

On the board there is an implemented drive for control of an external fan. In order to avoid overheating, the Raspberry Pi software can monitor the temperature of the processor part and can switch on a cooling fan when it rises above certain values. The fan is controlled by PWM, which allows regulation of its speed.
The connection of ZBR1 board to the Raspberry Pi is made by built in 2x20 connector.