¶ Bluetooth apair system
UART 38400 baud
PIN code: 1234
Il existe différents modules de différents fournisseurs. Chaque fournisseur possède son propre jeu de commande AT.
Il convient donc d'obtenir la documentation du module utilisé (Datasheet)
¶ Principe
MAC address is a 48 Bit word
nn, NAP, 16 bit Non-significant Address Portion (2 byte)
uu, UAP, 8 bit Upper Address Portion (1 byte)
ll, LAP, 24 bit Lower Address Portion (3 byte)
Le Master est maitre du réseau Bluetooth, le Slave est dépendant du Master.
Master et Slave peuvent échanger des informations dans les 2 sens (Bidirectionnel).
Un Master peut connecter plusieurs Slaves.
¶ SLAVE
| Step | HC05 | JDY-31 |
|---|---|---|
| Get MAC address: | AT+ADDR | AT+LADDR |
| Set module Name | AT+NAME=HC-05-SLAVE | AT+NAMEJDY-31-SLAVE |
| Serial port to 38400 baud | AT+UART=38400,0,0 | AT+BAUD6 |
| Set PIN code | AT+PSWD=1234 | AT+PIN1234 |
| Set role Slave | AT+ROLE=0 | AT+ROLE=0 |
¶ MASTER
| Step | HC05 | JDY-31 |
|---|---|---|
| Set module Name | AT+NAME=HC-05-MASTER | AT+NAMEJDY-31-MASTER |
| Serial port to 38400 baud | AT+UART=38400,0,0 | AT+BAUD6 |
| Set PIN code | AT+PSWD=1234 | AT+PIN1234 |
| Set role Master | AT+ROLE=1 | AT+ROLE=1 |
| Set remote MAC address | AT+BIND=nn,uu,ll | AT+BIND=nn,uu,ll |
¶ Mode d'emploi
...
#define RESET true
...
Pour procéder à la configuration des modules.
Laisser le logiciel configurer les modules... après le redemarrage de ceux-ci, tout ce qui est entré sur le port console est envoyé le module Master et le retour du module Slave est aussi affiché.
¶ Configurateur automatique
¶ Code Mega2560
// Arduino MEGA2560_R3
// HC-05 HC-03 OK (With push button)
// JDY-31 OK
// HC-06 Non configurable 9600 Code:1234
//
// Attention SoftwareSerial pose des pb sur Méga2560
#define BaudTabSize 14
#define RESET true
// If reset true, this code will apair both modules.
// If reset false, this code will dump both modules configuration.
#define Master_Enable 12
#define Master_VCC 9
#define Master_TX 16 // Serial 2
#define Master_RX 17
#define Master_STATE 3
#define Slave_Enable 11
#define Slave_VCC 8
#define Slave_TX 18 // Serial 1
#define Slave_RX 19
#define Slave_STATE 2
// Serial_1: Bluetooth Slave
// Serial_2: Bluetooth Master
unsigned long bauds[BaudTabSize] = {300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 74880, 115200, 230400, 460800, 921600, 1382400 };
long BTBAUD=38400;
long CONSOLEBAUD=9600;
String msg;
String BT_answer = "";
String pairingBind = "";
bool match = false;
void setup(){
pinMode(Master_STATE,INPUT);
pinMode(Master_VCC,OUTPUT);
pinMode(Master_Enable,OUTPUT); // Enable / Key
digitalWrite(Master_VCC, HIGH);
digitalWrite(Master_Enable, HIGH);
pinMode(Slave_STATE,INPUT);
pinMode(Slave_VCC,OUTPUT);
pinMode(Slave_Enable,OUTPUT); // Enable / Key
digitalWrite(Slave_VCC, HIGH);
digitalWrite(Slave_Enable, HIGH);
Serial.begin(CONSOLEBAUD);
Serial.println("Hello Bluetooth scanner !");
Serial.println("=========================");
Serial.println("> Slow blinking => AT mode (Enable to VCC)");
Serial.println("> Fast blinking => data mode (Enable to GND)");
Serial.println(" ");
Serial.println("");
Serial.println("SCAN SLAVE...");
if (!BT_Scan(0)) { // 1:Master/Serial2, 0:Slave/Serial1
Serial.println("!!! Fallback "+String(BTBAUD)+" baud !!!");
Serial1.begin(BTBAUD);
}
Serial.println("SCAN MASTER...");
if (!BT_Scan(1)) { // 1:Master/Serial2, 0:Slave/Serial1
Serial.println("!!! Fallback "+String(BTBAUD)+" baud !!!");
Serial2.begin(BTBAUD);
}
Serial.println("ENTER AT Commands:");
digitalWrite(Master_Enable, LOW);
digitalWrite(Slave_Enable, LOW);
if (RESET) {
Serial.println("!!! RESET BOTH MODULES ");
delay(1000);
digitalWrite(Master_VCC, LOW);
digitalWrite(Slave_VCC, LOW);
delay(2000);
digitalWrite(Master_VCC, HIGH);
digitalWrite(Slave_VCC, HIGH);
Serial.println("!!! DONE !!!");
}
}
void loop(){
readSerialPort();
if(msg!="") {
Serial.println("SEND:"+msg);
Serial2.println(msg);
delay(50);
}
if (RESET) {
if (Serial1.available()>0){
Serial.write(Serial1.read());
}
} else {
if (Serial2.available()>0){
Serial.write(Serial2.read());
}
}
}
void readSerialPort(){
msg="";
while (Serial.available()) {
delay(10);
if (Serial.available() >0) {
char c = Serial.read();
msg += c;
}
}
if ( msg == "test?" ) {
readAnyBT(1);
} else if ( msg == "scan?" ) {
BT_Scan(1);
} else if ( msg.substring(0,5) == "speed" ) {
BTBAUD = msg.substring(5).toInt();
Serial.println("!!! Fallback "+String(BTBAUD)+" baud !!!");
Serial2.begin(BTBAUD);
} else if ( msg != "" ) {
// Serial.println(msg);
}
}
void readHC06(int role) {
Serial2.begin(BTBAUD);
Serial.println("");
Serial.print("Dump Bluetooth module HC-06 like - ");
Serial.println(BTBAUD);
sendCommand(role, "AT+NAME", true);
sendCommand(role, "AT+VERSION", true);
Serial.println("0:Slave 1:Master 2:Slave-loop ");
sendCommand(role, "AT+ROLE", true);
sendCommand(role, "AT+CMODE", true);
sendCommand(role, "AT+UART", true);
sendCommand(role, "AT+UART", true);
if (role == 0) {
pairingBind = sendCommand(role, "AT+ADDR", true);
} else {
sendCommand(role, "AT+ADDR", true);
}
sendCommand(role, "AT+PSWD", true);
}
void readHC05(int role) {
Serial2.begin(BTBAUD);
Serial.println("");
Serial.print("Dump Bluetooth module HC-03 HC-05 like - ");
Serial.println(BTBAUD);
if (RESET) {
Serial.println(">>> RESETING MODULE !!!");
String newAddr = sendCommand(role, "AT+ADDR", true);
newAddr = "AT+NAME=HC-05-" + newAddr.substring(16, 20);
sendCommand(role, newAddr, false);
sendCommand(role, "AT+UART=38400,0,0", false);
sendCommand(role, "AT+PSWD=1234", false);
if (role == 1) {
sendCommand(role, "AT+ROLE=1", true);
pairingBind = "AT+BIND=" + pairingBind.substring(0, 4)+","+pairingBind.substring(4, 6)+","+pairingBind.substring(6, 12);
sendCommand(role, pairingBind, true);
} else {
sendCommand(role, "AT+ROLE=0", true);
}
Serial.println("<<< END RESETING MODULE !!!");
}
sendCommand(role, "AT+NAME", true);
sendCommand(role, "AT+VERSION", true);
Serial.println("0:Slave 1:Master 2:Slave-loop ");
sendCommand(role, "AT+ROLE", true);
sendCommand(role, "AT+CMODE", true);
sendCommand(role, "AT+UART", true);
if (role == 0) {
pairingBind = sendCommand(role, "AT+ADDR", true);
pairingBind = pairingBind.substring(6,10)+pairingBind.substring(11,13)+pairingBind.substring(14,20);
Serial.println(">>> MAC:"+pairingBind+":");
} else {
sendCommand(role, "AT+ADDR", true);
}
sendCommand(role, "AT+PSWD", true);
Serial.println("Reset usine: AT+ORGL ");
}
void readAnyBT(int role) {
Serial2.begin(BTBAUD);
Serial.println("");
Serial.print("Dump unknown Bluetooth module - ");
Serial.println(BTBAUD);
// sendCommand("AT+VERSION\n\r", true);
sendCommand(role, "AT", true);
sendCommand(role, "AT+NAME", true);
sendCommand(role, "AT+NAME?", true);
sendCommand(role, "AT+VERSION", true);
sendCommand(role, "AT+VERSION?", true);
sendCommand(role, "AT+ROLE", true);
sendCommand(role, "AT+ROLE?", true);
sendCommand(role, "AT+CMODE", true);
sendCommand(role, "AT+CMODE?", true);
sendCommand(role, "AT+BAUD", true);
sendCommand(role, "AT+BAUD?", true);
sendCommand(role, "AT+UART", true);
sendCommand(role, "AT+UART?", true);
sendCommand(role, "AT+LADDR", true);
sendCommand(role, "AT+LADDR?", true);
sendCommand(role, "AT+ADDR", true);
sendCommand(role, "AT+ADDR?", true);
sendCommand(role, "AT+PSWD", true);
sendCommand(role, "AT+PSWD?", true);
sendCommand(role, "AT+PIN", true);
sendCommand(role, "AT+PIN?", true);
sendCommand(role, "AT+STATE", true);
sendCommand(role, "AT+STATE?", true);
}
void readJDY31(int role) {
Serial2.begin(BTBAUD);
Serial.println("");
Serial.print("Dump Bluetooth module JDY-31 like - ");
Serial.println(BTBAUD);
if (RESET) {
Serial.println(">>> RESETING MODULE !!!");
String newAddr = sendCommand(role, "AT+LADDR", true);
newAddr = "AT+NAMEJDY-31-SPP-" + newAddr.substring(newAddr.length()-6, newAddr.length()-2);
Serial.println(newAddr);
sendCommand(role, newAddr, true);
sendCommand(role, "AT+BAUD6", false);
sendCommand(role, "AT+PIN1234", false);
if (role == 1) {
sendCommand(role, "AT+ROLE=1", true);
pairingBind = "AT+BIND="+pairingBind.substring(0, 4)+","+pairingBind.substring(4, 6)+","+pairingBind.substring(6, 11);
// pairingBind = "AT+BIND=" + pairingBind;
sendCommand(role, pairingBind, true);
} else {
sendCommand(role, "AT+ROLE=0", true);
}
Serial.println("<<< END RESETING MODULE !!!");
}
sendCommand(role, "AT+NAME", true);
sendCommand(role, "AT+VERSION", true);
Serial.println("0:Slave 1:Master 2:Slave-loop ");
sendCommand(role, "AT+ROLE", true);
sendCommand(role, "AT+CMODE", true);
Serial.println("4:9600 5:19200 6:38400 7:57600 8:115200 9:128000");
sendCommand(role, "AT+BAUD", true);
if (role == 0) {
pairingBind = sendCommand(role, "AT+LADDR", true);
pairingBind = pairingBind.substring(7,18);
Serial.println(">>> MAC:"+pairingBind+":");
} else {
sendCommand(role, "AT+LADDR", true);
}
sendCommand(role, "AT+PIN", true);
Serial.println("/!\\ Restart module to set values... /!\\");
}
bool BT_Scan(int role) {
bool identified = false;
bool bt_state = false;
match = false;
delay(100);
switch (role) {
case 1:
Serial.println(">>>> (Serial 2) MASTER BT module start scan !");
bt_state = digitalRead(Master_STATE);
break;
default:
Serial.println(">>>> (Serial 1) SLAVE BT module start scan !");
bt_state = digitalRead(Slave_STATE);
break;
}
delay(100);
if ( bt_state == LOW ) {
for (int i = 0; i < BaudTabSize; i++) {
switch (role) {
case 1:
Serial.println(">> MASTER BT not connected !");
Serial2.begin(bauds[i]);
break;
default:
Serial.println(">> SLAVE BT not connected !");
Serial1.begin(bauds[i]);
break;
}
Serial.println("[ Test Speed = "+String(bauds[i])+" baud ]");
BT_answer = sendCommand(role, "AT", false);
if ( BT_answer != "" ) {
match = true;
} else {
BT_answer = sendCommand(role, "AT+VERSION", false);
if ( BT_answer != "" ) {
match = true;
} else {
BT_answer = sendCommand(role, "AT+VERSION?", false);
if ( BT_answer != "" ) {
match = true;
}
}
}
if (match) {
Serial.println(BT_answer);
Serial.print(" success ");
Serial.println(bauds[i]);
BTBAUD=bauds[i];
if( BT_answer.substring(0,2) == "OK" || BT_answer.substring(0,5) == "ERROR" ) {
identified = true;
readHC05(role);
}
if( BT_answer.substring(0,8) == "VERSION:" || BT_answer.substring(0,9) == "+VERSION:" ) {
identified = true;
readHC06(role);
}
if( BT_answer.substring(0,9) == "+VERSION=" ) {
identified = true;
readJDY31(role);
}
if( identified == false ) {
readAnyBT(role);
}
i = BaudTabSize+1;
}
}
} else {
Serial.println(">> BT connected !");
}
Serial.println("<<<< BT module end scan !");
if (match) {
return true;
} else {
return false;
}
}
String sendCommand(int role, const String command, bool echo) {
if (echo) {
Serial.println(">> ["+String(role)+" / "+command+"] ");
}
switch (role) {
case 1:
Serial2.println(command);
break;
default:
Serial1.println(command);
break;
}
delay(500);
char reply[128];
int i = 0;
switch (role) {
case 1:
while (Serial2.available()>0) {
// Serial.write(Serial2.read());
reply[i] = Serial2.read();
i += 1;
delay(10);
}
break;
default:
while (Serial1.available()>0) {
// Serial.write(Serial2.read());
reply[i] = Serial1.read();
i += 1;
delay(10);
}
break;
}
reply[i] = '\0';
if( echo ) {
Serial.println(reply);
}
delay(100);
return reply;
}