9546 – BLE400/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 BLE400 is a 2.4 GHz Bluetooth mother board by Waveshare. It expands the nRF51822 wireless module (Core51822) with I/O connectors, power options and an integrated CP2102 debug interface.

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Technical overview

Based on the nRF51822 SoC for Bluetooth 4.0 Low Energy and 2.4 GHz RF ultra-low-power applications.
Exposes all GPIOs via expansion headers for easy prototyping.
Onboard CP2102 chip provides serial debug output over USB.
Supports battery holder and multiple power supply options; battery type: CR1220.
Includes LEDs and user keys for status indication and interaction.
Compatible with other official boards to ease use.
The NRF51822 Eval Kit consists of the BLE400 mother board plus the Core51822 module.

Commands and examples – verify before use:

Y oder y senden → Start... wird empfangen, Gerät sendet aktiv; LED0 leuchtet.
Serial-Einstellungen: Baudrate 38400, 8 Datenbits, 1 Stopbit.
nRFgo Studio: nRF51 Programming → Erase all vor dem Flashen neuer Programme.
Keil μVision: blinky.uvproj öffnen, F7 zum Kompilieren, Download-Icon zum Flashen.
ble_app_hrs: erst S110-SoftDevice flashen (s110_nrf51822_6.0.0_softdevice.hex), dann App kompilieren und laden.

Notes and version constraints

Exact slot dimensions are not specified in the source; confirm with the supplier.
If JLink firmware fails to cooperate with the Nordic SDK, Keil download may fail; use nRFgo Studio as fallback.
SDK installation errors require installing Microsoft .NET Framework 3.5.
Phone connection requires the phone to support Bluetooth 4.0 and have the appropriate app installed.
The app displays received data only after 19 characters are received; shorter sequences are not shown.
Version-sensitive steps (nRFgo Studio ≥ v1.14, Keil MDK-ARM ≥ v4.54, J-Link Software ≥ v4.52b) must be verified before starting.

Source and revision record

BLE400 - Waveshare Wiki
Source revision: 70115
Captured: 2026-08-29T09:51:02+00:00
SHA-256: d1402d5d46381720f13a1c17b61ac43cc2473d22cb1b9815c84868c6b4f68060