The module is designed to work as a Zigbee coordinator or end device as part of a Smart Home controller with the appropriate software installed and configured.

The module is based on a modern Silicon Labs EFR32MG21A020F1024IM32 wireless microcontroller for the 2.4GHz band and features high performance, increased transmitter output power and compact size.

Main technical characteristics:

• 80МГц processor Arm® Cortex®-M33;
• Flash memory 1024KB;
• SRAM 96KB;
• Transmitter output power up to +20 dBm;
• Supply voltage 3.3V;
• Current consumption in active mode up to 200 mА.
• Overall dimensions of the module 28 х 18 mm.

The module is based on the schematics of the Silabs EFR32xG21 (BRD4180B) debug board based on the EFR32MG21 chip:

• Описание платы BRD4180B

The module is made in the format of a unified JetHome wireless module 28 x 18 mm in size with contacts located along the perimeter of the module. Top view of the module:

Module pins assignment:

For information on supported firmware, see the documentation: ПО стиков и модулей, основанных на чипе Silicon Labs EFR32MG21

When using firmware from USB stick Z4:

• Provides a transition to the bootloader mode at a low logic level at the input PB00.
• It is possible to connect LEDs to indicate the operating mode: PD02 (red LED) and PD03 (green LED). A high logic level on these pins lights the corresponding LED.
• The UART TX line is output to PA05, UART RX - PA06. Hardware flow control RTS/CTS is not used.

For instructions on flashing the module, see the documentation: Инструкция по прошивке микроконтроллеров EFR32MG21