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Raspberry Pi Pico Pico-BLE User Guide


The module can only be connected to the mobile phone currently.

Product introduction

The Pico-BLE is a dual-mode Bluetooth 5.1 expansion module designed for Raspberry Pi Pico, which is controlled via UART AT commands, with SPP and BLE support. Combined with the Raspberry Pi Pico, it can be used for Bluetooth wireless communication applications.

Product Features

  • Standard Raspberry Pi Pico header, supports Raspberry Pi Pico series.
  • Controlled via UART AT commands, get started quickly.
  • Comes with development resources and manual (Raspberry Pi Pico C/C++ and MicroPython examples).


  • Input voltage: 3.3V/5V
  • Communication: UART
  • Communication rate: up to 1,000,000 bps
  • Dimensions: 56.5 × 21mm


Product Size

Get Started with Pico

Firmware Download

MicroPython Firmware Download

C_Blink Download


For the Pico-BLE module, we provide an serial example. Hereby we take C codes to explain the function.

Hardware interface


The Bluetooth module initialization function mainly judges whether the Bluetooth module is successfully connected to the mobile phone, whether the notify function is enabled, querying the baud rate of the Bluetooth module, judges whether it is in low power mode, name, address, and modifying the name of the module.

void BLE_Init()

Execute and process BLE commands

uint8_t Cmd_Process(uint8_t *data)
    data: the address of the command pointer to send

Transparent transmission receiving function, what data the mobile phone sends to the module, the module receives and returns the same data through this function

void UART_RX()     Query receive
void UART_RX_IRQ() Interrupt receive

Parameter modification


#define UART_ID uart0       Pico serial port selection
#define BAUD_RATE 115200    Serial port baud rate selection
#define DATA_BITS 8         Serial port data bits
#define STOP_BITS 1         Serial port data stop bits
#define PARITY UART_PARITY_NONE  Whether the serial port performs parity check
#define UART_TX_PIN 0       Pico serial port TX pin selection
#define UART_RX_PIN 1       Pico serial port RX pin selection
#define BLE_MODE_PIN 15     Bluetooth module status detection pin

Module command


For specific use, please refer to the user manual.


Mobile Phone APP Demo

Connect Pico and Pico-BLE to open the python program and run

Open the PicoGO software on the mobile phone (this is just a demonstration, you can download any Bluetooth APP in the app store)

Click on Bluetooth Control

Click Search in the upper right corner

Click the serial port mode (the request pairing interface will pop up later, no password is required)

Click pairing, the following will appear on the computer and mobile phone

Enter the data on the mobile phone and click send (the interface you send will be displayed on the computer)

PS: APPs using the BLE protocol on the mobile phone need to open the notify interface

Computer AT command demonstration

Use the USB to the serial port module to connect the computer and Pico-BLE, open the SSCOM software, select the corresponding baud rate (the default is 115200), enter the command, and enable "carriage return and line feed" (must be, otherwise the command will be invalid).

The above command is a reset command, please refer to the user manual for more commands.