Bluetooth 2.0 Module V3 For Arduino

Le Bluetooth 2.0 Module V3 For Arduino est un module bluetooth de chez DFRobot.

Initialisation

Le wiki de DFRobot indique la procédure à suivre pour initialiser le module.

Prérequis

Un USB to TTL Converter (CP210) - J'utilise un clone de celui de DFRobot.
Un terminal série ( le logiciel arduino, minicom, … )

Procédure

Il faut mettre le module Bluetooth en “AT Mode” (voir cette photo). On peut utiliser le programme Arduino pour communiquer avec le module. Voici les paramètres qu'il faut utiliser :

( 38400 bauds , CR + NL )

Commandes AT

Listes des commandes AT

Toutes les commandes se trouvent dans la datasheet du TEL0026, voici un aperçu :

  * Input: at 
    * Return: OK

  * Input: at+name? 
    * Return: +NAME:H-C-2010-06-01 (après une remise aux paramètres par défaut, sinon "+NAME:BluetoothV3")

  * Input: at+name=cequonveut 
    * Return: OK

  * Input: at+name? 
    * Return:+name: cequonveut OK

  * Input: at+role? 
    * Return: +role:0 OK 

  * Input: at+role=0 
    * Return: OK 

  * Input: AT+PSWD?
    * Return: +PSWD:1234 OK

  * Input: AT+ORGL (Restore the default setting:)
    * Return: OK 

  * Input: AT+UART?
    * +UART:38400,0,0

  * Input: AT+UART=115200,0,0 
    * Return: OK
        Param1: baud rate (bits/s) 4800/ 9600/ 19200/ 38400/ 57600/ 115200/ 230400/ 460800/ 912600/ 1382400
        Param2: stop bit , 0- 1 bit/ 1- 2 bits
        Param3: parity bit, 0- None/ 1- Odd/ 2- Even 

  * Input: AT+RESET
    * Return: OK

  * Input: AT+ADDR?
    * Return: +ADDR:12d5:42:307864 OK

  * Input: AT+IAC?
    * Return: +IAC:9e8b33 OK

  * Input: AT+SENM?
    * Return: +SENM:0,0 OK

Configuration basique de deux modules

Module “slave” :

  * AT+NAME=module-slave
  * AT+ROLE=0
  * AT+ADDR?
    * +ADDR:98d3:32:302390 OK

Module “master” :

  * AT+NAME=module-master
  * AT+ROLE=1
  * AT+ADDR?
    * +ADDR:98d3:32:20222e OK

Depuis le module “master”, on peut chercher après le module “slave”.

  * AT+INIT
  * AT+CMODE?
    * CMOD:1
  * AT+CMODE=2
  * AT+CMODE?
    * CMOD:2
  * AT+BIND?
    * +BIND:98d3:31:300e42
    * OK
  * at+iac=9e8b33 (inquire general inquire access code)
    * OK 
  * at+class=0 (inquire all devices types)
    * OK 
  * at+inqm=1,9,48 (Inquire mode: RSSI, max number 9, timeout 48)
    * OK
  * at+state?
    * +STATE:INITIALIZED
  * At+inq
    * +INQ:D0B3:3F:9EC870,5A0204,FFBB
    * +INQ:D0B3:3F:9EC870,5A0204,FFBB
    * +INQ:D0B3:3F:9EC870,5A0204,FFB7
    * +INQ:D0B3:3F:9EC870,5A0204,FFBA
    * +INQ:D0B3:3F:9EC870,5A0204,FFBA
    * +INQ:D0B3:3F:9EC870,5A0204,FFBB
    * +INQ:D0B3:3F:9EC870,5A0204,FFBC
    * +INQ:D0B3:3F:9EC870,5A0204,FFBD
    * +INQ:D0B3:3F:9EC870,5A0204,FFBB
    * OK

Erreurs possibles

La page 16/23 du datasheet du TEL0026 donne la liste des erreurs possibles.

Error_code (hex)  | Explanation
------------------------------------------------------------------------
0                 | AT command error
1                 | The result is default value
2                 | PSKEY write error
3                 | Device  name  is  too  long  (more  than  32 bytes) 
4                 | Device name is 0 byte
5                 | Bluetooth address: NAP is too long
6                 | Bluetooth address: UAP is too long
7                 | Bluetooth address: LAP is too long
8                 | PIO port mask length is 0
9                 | Invalid PIO port
A                 | Device class is 0 byte
B                 | Device class is too long
C                 | Inquire Access Code length is 0
D                 | Inquire Access Code is too long
E                 | Invalid Inquire Access Code
F                 | Pairing password is 0
10                | Pairing password is too long (more than 16 bytes) 
11                | Role of module is invalid
12                | Baud rate is invalid
13                | Stop bit is invalid
14                | Parity bit is invalid
15                | No device in the pairing list
16                | SPP is not initialized
17                | SPP is repeatedly initialized
18                | Invalid inquiry mode
19                | Inquiry timeout
1A                | Address is 0
1B                | Invalid security mode
1C                | Invalid encryption mode

Données pour Cosmo et la télécommande

Cosmo (slave)

at
  OK
at+init
  OK
at+state?
  +STATE:INITIALIZED
at+name?
  +NAME:cosmo
at+role?
  +ROLE:0
at+addr?
  +ADDR:98d3:32:302390
at+uart?
  +UART:38400,0,0
at+iac?
  +IAC:9e8b33
at+cmode?
  +CMOD:0

Commande (master)

at
  OK
at+init
  OK
at+state?
  +STATE:INITIALIZED
at+name?
  +NAME:commande
at+role?
  +ROLE:0
at+addr?
  +ADDR:98d3:32:20222e
at+uart?
  +UART:38400,0,0
at+iac?
  +IAC:9e8b33
at+cmode?
  +CMOD:0
at+bind?
  +BIND:98d3:31:300e42
at+inq
  +INQ:98D3:32:302390,0,7FFF     //le module bluetooth slave!!
at+pair=98d3,32,302390,30        //se connecter au module slave (avec timeout de 30s)
  OK
at+state?
  +STATE:PAIRED                  //yes!
at+mrad?
  +MRAD:98d3:32:302390
at+link=98d3,32,302390
  OK

Sources

Datasheet du TEL0026