Bluetooth Controler
Support BLE5.0 specification, low power 2.4g transceiver, rate of 2Mbps. Low power consumption 32-bit CPU, built-in 500KB Flash, 64KB SRAM memory, and provide rich peripheral resources. Support the OTA.

- BLE 5.0
- 32-bit microprocessor, frequency 64MHz 
- 512k Flash, 64k RAM 
- Power Consumption: 5.2mA receive, 5mA transmit (-dBm)
- Transmit frequency: -20~+4dBm
- Sensitivity: -96dBm 
- Operating voltage: 2.0V~3.6V, TYP: 3V
- Operating Temperature: -40℃~85℃
- Package: QFN32
  Interface and Peripherals: 
- 2xUARTs                
- 4xPWWM
  Reusable GPIOs

New generation of State Grid meter (meter calibration is not supported), Circuit breaker and Power Internet of things.
Device family

Transmission distance > 10m 
Size: 10x 14.5x 2.2mm 
Support protocol: DL/T 698, DL/T 645, standard AT
Operating voltage: 3.3V
Up to 17 GPIOs interface 
Support 2 Hosts and 3 Slaves, secondary development