S122SoftDevice

Memory-optimized Central-only Bluetooth Low Energy protocol stack

SoftDevice S112 is a memory-optimized Bluetooth® Low Energy protocol stack for the nRF52820 System-on-Chip (SoC). Up to 8 connections as a Central can be run concurrently with an Observer. It is currently an alpha release, but it will be Bluetooth 5.1 qualified. It supports the following Bluetooth features: high-throughput 2 Mbps and channel selection algorithm 2 (CSA #2). The number of connections and bandwidth per connection are configurable, offering memory and performance optimization.

It is a complete stack with GAP, GATT, ATT, SM and Link Layer. Both GATT Server and Client are supported. The broad feature set also includes Privacy 1.2, configurable ATT MTU and LE Secure Connections.

 SoftDevice specification for S122 will be released when it goes out of alpha.

Key features

Will be Bluetooth 5.1 qualified

High-throughput 2 Mbps

CSA #2

LE Secure Connections

Privacy 1.2

Configurable ATT Table

Configurable ATT MTU

Custom UUID

Concurrent multiprotocol support

All nRF52 Series protocol stacks

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nRF52 Series SoCs

Compatible with SoftDevice S122

nRF52820 SoC

Bluetooth 5.2 SoC with built-in USB and Bluetooth Low Energy, Bluetooth mesh, Thread and Zigbee support

64 MHz Arm Cortex-M4
256 KB Flash, 32 KB RAM
2 Mbps, 1 Mbps, Long Range
Bluetooth Low Energy
Bluetooth Direction Finding
Bluetooth mesh
Thread, Zigbee
+8 dBm TX power
128-bit AES
UART, SPI, TWI, QDEC
Full Speed USB 2.0
-40 to 105 °C extended temperature range 
1.7 to 5.5 V supply voltage