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elec:notes:at05_bt_uart

# Configure an AT-05 Bluetooth - Serial Adapter

## Overview This module is a little bit cheaper than the other common ones, so I ordered two to evaluate them. Turns out the configuration is not that easy…

AT-05 Bluetooth module Footprint Schematic

## Steps

* You need an Android device, and to download the Blue\_SPP chinese app. I wouldn't recommend using your phone or anything having access to personnal information, the required permissions are quite… large. * Connect to the BLUE\_SPP bluetooth device, using 1234 as PIN and 115200 as baudrate. * Enter the _command_ mode: `#AT#SET=*#` where * is a multiple of 5 sec. 1 ⇒ 5s, 2 ⇒ 10s, …, 9 ⇒ 45s (9 is the maximum value). I guess it's an inactivity timeout. Every successful command should be answered by “OK”. * Get the current parameters: `#AT#GET#` * Set the name of the device: `#AT#NAME=newName#` * Set the PIN code: `#AT#PIN=xxxx#` * Change the MAC address: `#AT#MAC=xxxxxxxxxx#` * Change the baudrate: `#AT#UART=B,S#` where:

  • B is the baudrate setting, between 0 and 8:
    • 0 ⇒ 2400
    • 1 ⇒ 4800
    • 2 ⇒ 9600
    • 3 ⇒ 19200
    • 4 ⇒ 38400
    • 5 ⇒ 57600
    • 6 ⇒ 115200
    • 7 ⇒ 128000
    • 8 ⇒ 256000
  • S represents the parity
    • 0 ⇒ No check
    • 1 ⇒ Odd
    • 2 ⇒ Even

* Check the new settings: `#AT#GET#` * Exit the command mode: `#AT#SET=0#` * Power-cycle the BT module to apply the new settings

## Links

* Aliexpress link, with info * Common SPP BT adapters

/home/share/www/redox.ws/wiki/data/pages/elec/notes/at05_bt_uart.txt · Last modified: 2023/11/24 21:55 by 127.0.0.1