WSAL10649 – Core51822 (B)/en

Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The Core51822 (B) is a small-factor core board built around the nRF51822 multiprotocol BLE/2.4 GHz RF SoC for ultra-low-power wireless applications.

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WSAL10649 – Bluetooth 4.0 NRF51822 Core Board, Small Factor

Technical overview

The nRF51822 SoC supports Bluetooth 4.0 Low Energy and 2.4 GHz RF features.
The companion BLE400 mother board provides a battery holder, multiple power-supply options, accessible I/Os, an integrated CP2102 debugger, LEDs and user keys.
The evaluation kit consists of the BLE400 mother board and the Core51822 wireless module.
Recommended PC environment: Windows XP or Windows 7; nRFgo Studio v1.14 or later; Keil MDK-ARM Lite v4.54 or later; J-Link Software v4.52b or later.
For programming, install the nRF51 SDK; if installation errors occur, Microsoft .NET Framework 3.5 may be required.
blinky_example runs without an OS and executes directly after download; the LED visibly blinks.
ble_app_hrs additionally requires the S110 SoftDevice (Bluetooth protocol stack), e.g. s110_nrf51822_6.0.0_softdevice.hex.
For mobile connectivity, use nRFToolbox (Android) or nRF Utility (iOS); the app displays received data only after 19 characters are received.

Commands and examples – verify before use:

Send 'Y' or 'y' over serial to start broadcasting (LED0 lights up).
Serial settings: baud rate 38400, 8 data bits, 1 stop bit.
nRFgo Studio: select 'nRF51 Programming' > 'Erase all' before programming.
Keil: open blinky.uvproj, press F7 to build, then click Download.
For ble_app_hrs: nRFgo Studio > 'Program SoftDevice' > Browse (choose s110_nrf51822_6.0.0_softdevice.hex) > Program.

Notes and version constraints

J-Link firmware may fail to cooperate with the Nordic SDK; in that case use nRFgo Studio > 'Program Application'.
Initial output from the factory program is for self-test and can be ignored.
The mobile device must support Bluetooth 4.0 and have the appropriate app installed to detect the signal.
Compatibility with other boards and availability of specific firmware versions should be verified beforehand.

Source and revision record

Core51822 (B) - Waveshare Wiki
Source revision: 70262
Captured: 2026-08-30T02:35:33+00:00
SHA-256: fa2cdafbac077d82e66bb2012dde8f73700cdb399818d671600e7182db146eb6