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ANNA-B402 (open CPU)

Stand-alone Bluetooth 5.1 Low Energy module

Ultra-compact module for harsh professional environments

  • Ultra compact SiP (6.5 x 6.5 x 1.2 mm) with integrated antenna
  • Bluetooth 5.1, Bluetooth mesh, long range, Zigbee and Thread
  • Direction finding support for indoor location
  • Powerful open CPU architecture for customized applications
  • Extended temperature range up to 105 °C
  • Global certification
ANNA-B4
6.5 x 6.5 x 1.2 mm

Product variants

ANNA-B402

Bluetooth Low Energy module with open CPU, internal antenna, and antenna pin for external antenna connection

Product variantsANNA-B402
Features 
Angle-of-Arrival (AoA)
Angle-of-Departure (AoD)
Bluetooth high speed (LE 2M PHY)
Bluetooth long range (coded PHY)
Bluetooth mesh
Factory programmed MAC address(es)
FOTA
Secure boot ready
Simultaneous GATT server and client
Supports customer applications
Antenna 
Internal antenna
Antenna pin
Short range features 
Chip insidenRF52833
Bluetooth qualificationv5.1 (Bluetooth Low Energy)
Bluetooth Low Energy output power EIRP [dBm]9
Maximum range [m]600
Throughput [Mbit/s]1.4
Maximum number of connections20
Additional standardThread / Zigbee, NFC
Bluetooth profiles and services 
Bluetooth GATT
Microprocessor on board  
Standalone module open CPU
CPU features 
MCUCortex-M4F
RAM [kB]128 kB
Flash [kB]512 kB
Interfaces 
UART2
USB1
SPI4
TWI (I2C compatible)2
I2S1
GPIO33
ADC8
PWM4
PDM1
QDEC1
Electrical data 
Minimum supply [V]1.70
Maximum supply [V]3.6
Environmental data, quality & reliability 
Maximum temperature [°C]105
Minimum temperature [°C]-40
Other 
Size [mm]6.5 x 6.5 x 1.2