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用于HC-05蓝牙模块的交互式向导

454398 来源:网络整理 作者:网络整理 2019-11-12 08:55 次阅读

步骤1:硬件

HC-05 SMD模块(我从aliexpress获得)

Arduino Nano(同样来自aliexpress)

3x7cm双面原型板(同样来自aliexpress)

两个LED

单芯线的耦合

2.54厘米标头

步骤2:HC-05模块:

用于HC-05蓝牙模块的交互式向导

实际上,我使用的参考手册是关于具有不同产品编号的模块的,但是实际上,它是与HC-05相同的模块(我发现它写得很好并且带有漂亮的图形)。该模块的名称为 EGBT-045MS ,您可以在此处找到该手册。

特别是,我们对以下8个引脚感兴趣:

引脚1,2 :TX,RX:将发送/接收引脚连接到Arduino上的串行(或软件串行)引脚。

引脚12,13 :Vcc,GND:为模块加电。

引脚31,32 :指示LED,特别是“状态” LED和“以数据模式连接” LED

pin 11 》:重置引脚,用于重置模块以切换操作模式(AT/DATA)

引脚34 :命令模式引脚,用于

步骤3:连接:

要连接5v主机,您需要在HC-05 RX引脚上使用分压器(电阻器对),而不必在Vcc上使用因为它是5v容忍的(这就是手册至少说了。)

现在,说实话,我为3.3v Arduino pro mini进行了连接,但是后来我使用了5v Arduino Nano,并且我没有遵循指南向其添加电阻器RX线。但是,猜猜是什么,它可以正常工作,所以我将其保持不变;)

注意:我并不是说它将与您一起使用还是这种方式是正确的,我认为它只是偶然地与我合作。请按照接线图进行正确连接。

现在,将HC-05正确放置在原型板上(注意,HC-05是间距为1.5毫米,而面包板的间距为2.45毫米。因此,孔没有对齐,但只有很少的相邻电缆,您可以设法将其穿过)

接下来,放置Arduino Nano和HC-05引脚,两个用于LED的电阻器,LED本身(从另一端连接到GND),我还为I2C显示设置了连接(将在附近的另一条说明中添加和解释)

注意: 我没有将HC-05连接线连接到特定的Arduino引脚,我现在通过跳线进行此操作,以使其与其他组件(如果有)保持模块化。

步骤4:AT模式和HC-05重置。

在大多数参考文献中,要求您手动断开/重新连接HC-05的电源,以便将其放入AT模式(引脚34置于高电平)或返回数据模式(同一引脚为低电平状态)。如果您的应用程序需要按顺序从/向AT命令模式来回切换,则没有任何意义。

诀窍是允许Arduino控制Reset引脚(11号引脚)来重置模块。该过程如下

进入AT命令模式:

digitalWrite(pinEn,HIGH); // Set the Enable pin (no.34) to HIGH, and keep it during the AT command

digitalWrite(pinRe,LOW); // Set the Reset pin (no.11) to LOW, this postpones the module in preparation to reset

delay(100); // A short delay (should be more that 10 ms) to simulate a negative pulse on the reset pin

digitalWrite(pinRe,HIGH); // Set the Reset pin back to HIGH, and with Enable pin set to HIGH, the module restarts in AT Command mode.

进入数据传输模式:

digitalWrite(pinEn,LOW); // Set the Enable pin (no.34) to LOW, and keep it during the data transmission mode

digitalWrite(pinRe,LOW); // Set the Reset pin (no.11) to LOW, this postpones the module in preparation to reset

delay(100); // A short delay (should be more that 10 ms) to simulate a negative pulse on the reset pin

digitalWrite(pinRe,HIGH); // Set the Reset pin back to HIGH, and with Enable pin set to LOW, the module restarts in Data transmission mode.

第5步:交互使用用户输入

在我们的程序中,用户可以在三种模式之一中操作模块

AT命令模式: :您可以通过在串行终端中键入‘#start’来启用它,您需要在其中键入每个命令,并从中读取确切的响应

数据传输模式: :您可以通过在序列号中键入‘#end’来启用它终端,其中与模块的所有无线通讯都将列在串行监视器中,并且无法控制模块参数

操作菜单模式: ,您可以通过在串行终端中键入‘#op’来启用它,这会将模块放入AT命令模式,但不是由用户直接提供命令,而是通过具有预定义操作的交互式菜单来发出命令。

操作菜单允许进行以下操作:

显示模块设置

名称,波特率,角色,连接模式,密码

修改当前设置

修改模块名称

修改UART设置

修改配对代码/密码

切换角色(主/从)

更改连接模式

后退。..

重置为原始设置

仅限主机操作

发现附近的设备

与设备配对

连接到设备

从配对列表中删除设备

绑定设备

返回。..

第6步:代码:

下面是Arduino代码(您也可以下载文件本身)

请注意该程序中密集的字符串用法。我遇到了很多问题,因为如果这样做,我可以通过以下说明解决其中的几个问题:

使用‘String.reserve()’函数为字符串实例预先保留动态内存,这样可以更好地处理堆中的内存分配。但这还不够,因为它不能保证任何事情。

使用‘F()’宏:它允许将字符串存储在闪存而不是RAM中。它仅适用于print/println操作中的静态字符串。这非常有用,但还不够用(对动态字符串无济于事)

减少保留的字符串数:如果这不是您真正想要的,不要询问最多10个设备。例如3个就足够了。

在任何情况下该程序都将执行并上载的问题,但是它将以意外的方式运行,响应的查询与您键入的查询不同,并且

解决该问题的方法是使用char数组(或char *)代替字符串。这是我的下一步,但现在我没有时间去做;)

/*

* AT_AT_mode.ino - a wizard for HC-05 bluetooth modules

* Copyright (c) 2016 Rami Baddour. All right reserved.

* http://ramibaddour.com/ https://ch.linkedin.com/in/ramibaddour

*

* A program to view, set, modify and use the HC-05 bluetooth with an interactive textural menus

* over serial monitore

*

* You can include parts of the code that does specific functionality (e.g. search for devices)

* to your own program

*

* Note that this code uses intensively the String class, which has some unpredictable behaviour

* when virtual memory is not possible to researve. IT is tested to work perfectly when restricting

* number of recorded searched devices to 3. above this can have some problems with displyed strings.

*

* Newer version will use char arrays instead, hopefully with better stability.

*

*

*/

#include

SoftwareSerial mySerial(5, 4);// RX, TX where the HC-05 is connected

#define pinRe 3 // the Reset pin, connected to HC-05 pin No. 11

#define pinEn 6 // the Enable pin, connected to HC-05 pin No. 34

#define INQ1 1 // Inquire Acces mode: 0-standard 1-RSSI(default)

#define INQ2 100 // Maximum number of devices responce: 0-to-32000

#define INQ3 30 // Inquire timeout: 1-to-48 sec

#define MAXDEV 1 // Maximum number of devices to record.

#define PAIRTO “25” // Pairing timout in seconds

#define MAXSTRLEN 50 // maximum buffer researved for string variables.

#define ATSTART “#start” // The token string to start AT command input

#define ATEND “#end” // The token string to end AT command or Operational menu input

#define ATOP “#op” // The token string to start the operation menu.

// column widths in character count for the discovred BT devices‘ list

#define colW1 6

#define colW2 45

#define colW3 20

#define colW4 7

int8_t currIn = -1; // The current input, records the user selection and used within the program state machine

int8_t currSt = -1; // the current state, defines the current status in regards to the menu selections

int8_t deviceCount = 0; // the Reset pin, connected to HC-05 pin No. 13

int devCount = 0; // how many devices in total have been discovered in the last device inquiry

int devLoc = 0; // the location of the selected device within the list of discovered devices.

String serialStr, tmpName, tmpRes; //some string variables to be used later

//define a data structure for each descovered device. It inlcudes basic information like the name, address, RRSI and Service class

typedef struct inqDevices{

String Name;

String Address;

String RSSI;

String Class;

inqDevices(int defSize=MAXSTRLEN){

Name.reserve(defSize);

Name = “”;

Address.reserve(20);

Address = “”;

RSSI.reserve(20);

RSSI = “”;

Class.reserve(40);

Class = “”;

}

}inqDevice;

inqDevice lstDevices[MAXDEV]; // This function takes a string of any length ’strIn‘ and outputs a the same string but with fixed length ’strLen‘

// which is a substring of the input if length(strIn)》strLen, is the same as ’strIn‘ with the remaining characters

// filled with ’strFillChar‘ character.

// if ’strFill‘ is set to true, the input string is appended to the end of the result string as well.

String strFixed (String strIn, int strLen, boolean strFill = false, String strFillChar = “ ”){

String tmpStr1 = strIn.substring(0,strLen);

int tmpLen = tmpStr1.length();

for (int i=0; i《 (strLen - tmpLen); i++)

tmpStr1 = tmpStr1 + strFillChar;

if (strFill)

tmpStr1 = tmpStr1 + strIn;

return (tmpStr1);

}

// A function to clear the contents of the Device List array strings.

void clearDeviceList(){

for (int i = 0; i // Use the ’discardOK‘ setting if you want the function to discard the ’OK‘ result on the AT command return.

// Use the ’charsToCutFrom‘ and ’charsToCutTo‘ if you want to get only a substring of the AT command return. e.g. if you want to discard

// the ’+INQ:‘ initial part in the ’AT+INQ‘ command responce and get directly the address and signal information of the descovered device.

String getFromMySerial(String strToWrite = “”, bool discardOK=true, int charsToCutFrom = 0, int charsToCutTo = 150){

if (strToWrite != “”)

{

mySerial.println(strToWrite);

delay(50); // these delays may be not necessary, it just to accomodate slow responding HC-05 modules.

}

String tmpStr = (mySerial.readStringUntil(’ ‘));

tmpStr.trim();

delay(50);

if (discardOK)

mySerial.readStringUntil(’ ‘);

return tmpStr.substring(charsToCutFrom, charsToCutTo);

}

// This function is similar to the previous ’getFromMySerial‘。 But this one is used when the answer

// is not guarenteed after a fixed delay. e.g. if you wait to get remote BT device address or name in

// discovery process. also, it is used if you are not expecting a return value at all.

String getFromMySerialSimple(String strToWrite = “”, int charsToCutFrom = 0, int charsToCutTo = 150){

if (strToWrite != “”)

{

mySerial.println(strToWrite);

delay(100);

return “”;

}

else

{

while (!mySerial.available()){delay(10);}

String tmpStr = (mySerial.readStringUntil(’ ‘));

return tmpStr.substring(charsToCutFrom, charsToCutTo);

}

} void setup() {

Serial.begin(57600);

mySerial.begin(38400); // default HC-05 baud rate at AT-mode

Serial.print(F(“to enter AT mode please type ’”));

Serial.print(ATSTART);

Serial.print(F(“‘, to exist type ”));

Serial.print(ATEND);

Serial.print(F(“, or type ’”));

Serial.print(ATOP);

Serial.println(F(“ for the menu”));

pinMode(pinRe, OUTPUT);

pinMode(pinEn, OUTPUT);

serialStr = “”;

serialStr.reserve(MAXSTRLEN);

tmpName.reserve(MAXSTRLEN);

tmpRes.reserve(MAXSTRLEN);

} void loop(){

if (Serial.available()) {

serialStr = (Serial.readStringUntil(‘ ’));

serialStr.trim();

// Entering AT mode, you set EN pin to HIGH, and generate a 100ms negative pulse on the reset pin

if (serialStr.equalsIgnoreCase(ATSTART)) {

Serial.println(F(ATSTART));

Serial.println(F(“You are now in AT mode, Enter AT commands:”));

currIn = -1;

currSt = -5;

digitalWrite(pinEn,HIGH); // Set the Enable pin (no.34) to HIGH, and keep it during the AT command operation

digitalWrite(pinRe,LOW); // Set the Reset pin (no.11) to LOW, this postpones the module in preparation to reset

delay(100); // A short delay (should be more that 10 ms) to simulate a negative pulse on the reset pin

digitalWrite(pinRe,HIGH); // Set the Reset pin back to HIGH, and with Enable pin set to HIGH, the module restarts in AT Command mode.

serialStr = “”;

}

// Exiting AT mode into data transmission mode, you set EN pin to LOW, and generate a 100ms negative pulse on the reset pin

else if (serialStr.equalsIgnoreCase(ATEND)){

currIn = -1;

currSt = -1;

Serial.println(F(ATEND));

Serial.println(F(“You have quit AT mode.”));

digitalWrite(pinEn,LOW); // Set the Enable pin (no.34) to LOW, and keep it during the data transmission mode

digitalWrite(pinRe,LOW); // Set the Reset pin (no.11) to LOW, this postpones the module in preparation to reset

delay(100); // A short delay (should be more that 10 ms) to simulate a negative pulse on the reset pin

digitalWrite(pinRe,HIGH); // Set the Reset pin back to HIGH, and with Enable pin set to LOW, the module restarts in Data transmission mode.

}

// To enter the operational menu mode, you do the same as initiating AT mode, but with the state variablle state to 0 so you enable the menu state machine

else if (serialStr.equalsIgnoreCase(ATOP)){

currIn = 0;

currSt = 0;

Serial.println(F(ATOP));

digitalWrite(pinEn,HIGH);

digitalWrite(pinRe,LOW);

delay(100);

digitalWrite(pinRe,HIGH);

}

// For any other input, this is basically a selection of an item in the menu, or a command in AT mode.

else{

Serial.println(serialStr);

currIn = serialStr.toInt(); //any non-numerical input results in ‘0’

}

// This is when we start the AT mode , all inputs are sent to the bluetooth module.

if (currSt == -5){

mySerial.println(serialStr);

}

}

// In case of responce or input from the bluetooth module itself

if (mySerial.available()){

while (mySerial.available()){

tmpName = (mySerial.readStringUntil(‘ ’));

tmpName.trim();

Serial.println(tmpName);

delay(50);

} }

if (currIn 》= 0){ // enter the state machine only if we get a valid input

switch (currSt){ // the menu display selection

case 0:{ // this is the main menu

switch (currIn){ // based on the user input, selects the corresponding operation and therefore the next state

case 0:

Serial.println(F(“----------------------------------------------------------”));

Serial.println(F(“Please select from the following operations:”));

Serial.println(F(“ 1- Display the module settings”));

Serial.println(F(“ 2- Modify current settings”));

Serial.println(F(“ 3- Reset to original settings”));

Serial.println(F(“ 4- Master-only operations”));

Serial.println(F(“ 5 -”));

Serial.print(F(“(Option No.) ”));

currIn = -1; // we set to -1 to avoid entering into the state machine indefinately.

break;

case 1:

currSt = 1;

break;

case 2:

currSt = 2;

currIn = 0;

break;

case 3:

currSt = 3;

break;

case 4:

currSt = 4;

currIn = 0;

break;

default:

Serial.println (F(“not a valid input, please select from the list”));

currSt = 0;

currIn = 0;

}

break;

}

case 1:{ // display the module main settings. for each, send the command and wait for the result and display it

Serial.println(F(“----------------------------------------------------------”));

Serial.println(F(“The current module settings are:”));

Serial.print(F(“ -- Name : ”));

Serial.println(getFromMySerial(“AT+NAME”, true, 6));

Serial.print(F(“ -- Baudrate : ”));

Serial.println(getFromMySerial(“AT+UART”, true, 6));

Serial.print(F(“ -- Role : ”));

if (getFromMySerial(“AT+ROLE”, true, 6) == “1”)

Serial.println(F(“Master”));

else

Serial.println(F(“Slave”));

Serial.print(F(“ -- Conn. Mode : ”));

tmpRes = getFromMySerial(“AT+CMODE”, true, 6);

if ( tmpRes == “0”)

Serial.println(F(“Single remote connection”));

else if ( tmpRes == “1”)

Serial.println(F(“Any remote connection”));

else

Serial.println(F(“Test mode”));

Serial.print(F(“ -- Passowrd : ”));

Serial.println(getFromMySerial(“AT+PSWD”, true, 6));

currSt = 0;

currIn = 0;

break;

}

case 2:{ // The menu to modify the BT module settings

switch (currIn){

case 0:

Serial.println(F(“----------------------------------------------------------”));

Serial.println(F(“Please select from the following operations:”));

Serial.println(F(“ 1- Modify the module name”));

Serial.println(F(“ 2- Modify UART settings”));

Serial.println(F(“ 3- Modify the pairing code/PW”));

Serial.println(F(“ 4- Switch the role (Master/Slave)”));

Serial.println(F(“ 5- Change connection mode”));

Serial.println(F(“ 6- Back.。.”));

Serial.print(F(“(Option No.) ”));

currIn = -1;

break;

case 1:

currSt = 21;

currIn = 0;

break;

case 2:

currSt = 22;

currIn = 0;

break;

case 3:

currSt = 23;

currIn = 0;

break;

case 4:

currSt = 24;

currIn = 0;

break;

case 5:

currSt = 25;

currIn = 0;

break;

case 6:

currSt = 0;

currIn = 0;

break;

default:

Serial.println (F(“not a valid input, please select from the list”));

currSt = 2; // stay in the same menu if wrong input is entered

currIn = 0;

break;

}

break;

}

case 21:{ // Modify the module‘s name

Serial.println(F(“----------------------------------------------------------”));

Serial.print(F(“The curent module name is : ”));

Serial.println(getFromMySerial(“AT+NAME”, true, 6));

Serial.println(F(“Please enter a new name, or leave blank to keep the current setting.”));

while (!Serial.available());

tmpName = (Serial.readStringUntil(’ ‘));

tmpName.trim();

if (tmpName == “”)

Serial.println(F(“Name is left unchanged”));

else{

tmpName = “AT+NAME=” + tmpName;

tmpRes = getFromMySerial(tmpName, true);

if (tmpRes == “OK”)

Serial.println (F(“Name change successful”));

else

Serial.println (F(“Faild to change the name, please check the name and try again”));

}

currSt = 2;

currIn = 0;

break;

}

case 22:{ // Modify the serial UART port settings (Baudrate, Stop bit and Parity bits)

Serial.println(F(“----------------------------------------------------------”));

Serial.print(F(“The curent UART (Baudrate) settings are : ”));

tmpName = getFromMySerial(“AT+UART”, true, 6);

String tmpBR = tmpName.substring(0,tmpName.indexOf(’,‘)); // Baud rate

String tmpSB = tmpName.substring(tmpName.indexOf(’,‘)+1,tmpName.indexOf(’,‘)+2);// Stop Bit

String tmpPB = tmpName.substring(tmpName.indexOf(’,‘)+3,tmpName.indexOf(’,‘)+4);// Parity bit

Serial.println(tmpName);

Serial.println(F(“Choose new Baudrate, or leave it blank to keep unchanged. Possible options:”));

Serial.println(F(“(1) 4800 (2) 9600 (3) 19200 (4) 38400 (5) 57600”));

Serial.println(F(“(6) 115200 (7) 234000 (8) 460800 (9) 921600 (10) 1382400”));

while (!Serial.available());

tmpName = (Serial.readStringUntil(’ ‘));

tmpName.trim();

if (tmpName == “”)

{

Serial.print(F(“Baudrate is left unchanged: ”));

Serial.println(tmpBR);

}

else

{

int tmpInt = tmpName.toInt(); //Baudrate

if ((tmpInt 》 0)&&(tmpInt 《 11))

Serial.print(F(“Baudrate channged successfully, the new baudrate is: ”));

switch (tmpInt) {

case 1: case 2: case 3: case 4:

tmpBR = String(2400 * pow(2,tmpInt),0);

Serial.println(tmpBR);

break;

case 5: case 6: case 7: case 8: case 9:

tmpBR = String(1800 * pow(2,tmpInt),0);

Serial.println(tmpBR);

break;

case 10:

tmpBR = “1382400”;

Serial.println(tmpBR);

break;

default:

Serial.println(F(“Incorrect input, baudrate is left unchanged”));

}

}

Serial.println(); // Stop Bits

Serial.println(F(“Choose the number of Stop bits, or leave it blank to keep unchanged. Possible options:”));

Serial.println(F(“(a) 0:1 bit (b) 1:2 bits”));

while (!Serial.available());

tmpName = (Serial.readStringUntil(’ ‘));

tmpName.trim();

if (tmpName == “”)

{

Serial.print(F(“Stop bit number is left unchanged: ”));

Serial.println(tmpSB);

}

else if ((tmpName == “a”)||(tmpName == “A”))

{

tmpSB = “0”;

Serial.print(F(“Stop bit number is channged successfully, the new setting is: ”));

Serial.println(tmpSB);

}

else if ((tmpName == “b”)||(tmpName == “B”))

{

tmpSB = “1”;

Serial.print(F(“Stop bit number is channged successfully, the new setting is: ”));

Serial.println(tmpSB);

}

else

Serial.println(F(“Incorrect input, Stop bit number is left unchanged”));

Serial.println(); //Parity bits

Serial.println(F(“Choose parity bits setting, or leave it blank to keep unchanged. Possible options:”));

Serial.println(F(“(1) no parity (2) odd parity (3) even parity”));

while (!Serial.available());

tmpName = (Serial.readStringUntil(’ ‘));

tmpName.trim();

int tmpInt = tmpName.toInt();

if (tmpName == “”)

{

Serial.print(F(“Parity bits setting is left unchanged: ”));

Serial.println(tmpPB);

}

else if ((tmpInt 》0)&&(tmpInt 《4))

{

tmpPB = tmpName;

Serial.print(F(“Parity bits setting is channged successfully, the new setting is: ”));

Serial.println(tmpPB);

}

else

Serial.println(F(“Incorrect input, Parity bits setting is left unchanged”));

tmpName = “AT+UART=” + tmpBR + “,” + tmpSB + “,” + tmpPB; // The overal UART settings command

String tmpRes = getFromMySerial(tmpName, true);

if (tmpRes == “OK”)

Serial.println (F(“UART settings change successful”));

else

Serial.println (F(“Faild to change the UART settings, please try again”));

currSt = 2;

currIn = 0;

break;

}

case 23:{ // Modify the password (Pairing code)

Serial.println(F(“----------------------------------------------------------”));

Serial.print(F(“The curent pairing code is : ”));

Serial.println(getFromMySerial(“AT+PSWD”, true, 6));

Serial.println(F(“Please enter a new pairing passkey, or leave blank to keep the current code.”));

while (!Serial.available());

tmpName = (Serial.readStringUntil(’ ‘));

tmpName.trim();

if (tmpName == “”)

Serial.println(F(“Pairing passkey is left unchanged”));

else

{

tmpName = “AT+PSWD=” + tmpName;

String tmpRes = getFromMySerial(tmpName, true);

if (tmpRes == “OK”)

Serial.println (F(“Pairing passkey change successful”));

else

Serial.println (F(“Faild to change the Pairing passkey , please check the code and try again”));

}

currSt = 2;

currIn = 0;

break;

}

case 24:{ // Modify the role (Master/Slave/Slave-loop)

Serial.println(F(“----------------------------------------------------------”));

Serial.print(F(“The curent role setting is : ”));

tmpName = getFromMySerial(“AT+ROLE”, true, 6);

tmpName.trim();

Serial.print(tmpName);

if (tmpName == “0”)

Serial.println(F(“ [Slave]”));

else if (tmpName == “1”)

Serial.println(F(“ [Master]”));

else if (tmpName == “2”)

Serial.println(F(“ [Slave-loop]”));

Serial.println(F(“Choose a new role, or leave it blank to keep unchanged. Possible options:”));

Serial.println(F(“(0) 0:Slave (1) 1:Master (2) 2:Slave-loop”));

while (!Serial.available());

tmpName = (Serial.readStringUntil(’ ‘));

tmpName.trim();

if (tmpName == “”)

{

Serial.print(F(“Role is left unchanged: ”));

}

else

{

int tmpInt = tmpName.toInt();

switch (tmpInt)

{

case 0: case 1: case 2:

tmpName = “AT+ROLE=” + tmpName;

tmpRes = getFromMySerial(tmpName, true);

if (tmpRes == “OK”)

Serial.println (F(“Role change successful”));

else

Serial.println (F(“Faild to change the role, please try again”));

break;

default:

Serial.println(F(“Incorrect input, role is left unchanged”));

break;

}

}

currSt = 2;

currIn = 0;

break;

}

case 25:{ // Change the connection mode

Serial.println(F(“----------------------------------------------------------”));

Serial.print(F(“The curent connection mode is : ”));

tmpName = getFromMySerial(“AT+CMODE”, true, 6);

tmpName.trim();

Serial.print(tmpName);

if (tmpName == “0”)

Serial.println(F(“ [Single remote connection]”));

else if (tmpName == “1”)

Serial.println(F(“ [Any remote connection]”));

else if (tmpName == “2”)

Serial.println(F(“ [Test mode]”));

Serial.println(F(“Choose a new connection mode, or leave it blank to keep unchanged. Possible options:”));

Serial.println(F(“(0) 0:Single remote connection (1) 1:Any remote connection (2) 2:Test mode”));

while (!Serial.available());

tmpName = (Serial.readStringUntil(’ ‘));

tmpName.trim();

if (tmpName == “”)

{

Serial.print(F(“Connection mode is left unchanged: ”));

}

else

{

int tmpInt = tmpName.toInt();

switch (tmpInt)

{

case 0: case 1: case 2:

tmpName = “AT+CMODE=” + tmpName;

tmpRes = getFromMySerial(tmpName, true);

if (tmpRes == “OK”)

Serial.println (F(“Connection mode change successful”));

else

Serial.println (F(“Faild to change the connection mode, please try again”));

break;

default:

Serial.println(F(“Incorrect input, connection mode is left unchanged”));

break;

}

}

currSt = 2;

currIn = 0;

break;

}

case 3:{ // Reset the module to the original settings

Serial.println(F(“----------------------------------------------------------”));

Serial.println(F(“The module settings are reset to original”));

getFromMySerial(“AT+ORGL”, false, 6);

Serial.print(F(“ -- Name : ”));

Serial.println(getFromMySerial(“AT+NAME”, true, 6));

Serial.print(F(“ -- Baudrate : ”));

Serial.println(getFromMySerial(“AT+UART”, true, 6));

Serial.print(F(“ -- Role : ”));

if (getFromMySerial(“AT+ROLE”, true, 6) == “1”)

Serial.println(F(“Master”));

else

Serial.println(F(“Slave”));

Serial.print(F(“ -- Passowrd : ”));

Serial.println(getFromMySerial(“AT+PSWD”, true, 6));

currSt = 0;

currIn = 0;

break;

}

case 4:{ // The menu to perform the Master module operations.

if (getFromMySerial(“AT+ROLE”, true, 6) != “1”) { // Check if the module role=1 which mean the module is master.

Serial.println(F(“The module should be in Master role to perform these operations, please change the role.”));

currSt = 2;

currIn = 0;

}

else{

switch (currIn){

case 0:

Serial.println(F(“----------------------------------------------------------”));

Serial.println(F(“Please select from the following operations:”));

Serial.println(F(“ 1- Discover nearby devices”));

Serial.println(F(“ 2- Pair with a device”));

Serial.println(F(“ 3- Connect to a device”));

Serial.println(F(“ 4- Remove devices from pairing list”));

Serial.println(F(“ 5- Bind with a device”));

Serial.println(F(“ 6- Back.。.”));

Serial.print(F(“(Option No.) ”));

currIn = -1;

break;

case 1:

currSt = 41; currIn = 0; break;

case 2:

currSt = 42; currIn = 0; break;

case 3:

currSt = 43; currIn = 0; break;

case 4:

currSt = 44; currIn = 0; break;

case 5:

currSt = 45; currIn = 0; break;

case 6:

currSt = 0; currIn = 0; break;

default:

Serial.println (F(“not a valid input, please select from the list”));

currSt = 4; currIn = 0; break;

}

}

break;

}

case 41:{ // Inquire nearby devices (addresses + names)

Serial.println(F(“----------------------------------------------------------”));

Serial.println(F(“List of nearby devices:”));

getFromMySerial(“AT+INIT”, true); // Discard the result, it may result in error if the SPP profile is already opened

tmpName = String(“AT+INQM=” + String(INQ1) + “,” + String(INQ2) + “,” + String(INQ3));

tmpRes = getFromMySerial(tmpName, true);

if (tmpRes != “OK”)

Serial.println (F(“Inquire mode setting failed”));

else

{

getFromMySerialSimple(“AT+INQ”); // As multiple devices might be discovered, only execute the command then wait on serial for each new line until “OK” is received

clearDeviceList();

tmpName = getFromMySerialSimple(“”, 5); // at least, we have on result even if no devices were discovered, which is the “OK” output at the end of the inquire process

while ((tmpName !=“”)) // As “OK” is less than 5 characters long, the result will be empty string when OK is received.

{

int ind1st = tmpName.indexOf(’,‘); // the index of the first comma

int ind2nd = tmpName.indexOf(’,‘,ind1st + 1); // the index of the second comma

String devAddr = tmpName.substring(0,ind1st); // The device’s address

String devClas = tmpName.substring(ind1st+1,ind2nd); // The device‘s service class

String devRSSI = tmpName.substring(ind2nd+1); // The device’s RSSI

devLoc = searchDeviceList(devAddr); // check ifthe device address is already discovered, As in most cases the same deie can be discovered multiple times with different RSSI and/or different service classes

if ((devLoc 《 0)&& devCount 《 MAXDEV) // a new device, not found in the list, but there is still empty slot in the list (did not exceed the maximum number of stored devices)

{

lstDevices[devCount].Address = devAddr; // we store the new device data

lstDevices[devCount].Class = devClas;

lstDevices[devCount].RSSI = devRSSI;

devCount++;

}

delay(10);

tmpName = getFromMySerialSimple(“”, 5); // get the next input from MySerial (i.e. BT device)

}

Serial.println (strFixed(“+”,colW1 + colW2 + colW3 + colW4 + 3,true,“-”)); // draw a table with the results

Serial.println (“| ” + strFixed(“Ind.”,colW1)+ strFixed(“BT Device Name:”,colW2) + strFixed(“BT Device Address”,colW3) + strFixed(“Paired”,colW4)+ “ |”);

Serial.println (“| ” + strFixed(“-----”,colW1)+ strFixed(“----------------”,colW2) + strFixed(“------------------”,colW3) + strFixed(“-------”,colW4)+ “ |”);

for (int i=0; i devCount){ // if a numerical input exceeds the number of stored/discovered devices

Serial.println(F(“----------------------------------------------------------”));

Serial.println(F(“The selected index is out of bounds, please select within the list of available devices”));

Serial.print(F(“(Option No.) ”));

currIn = -3; // stay in the same menu, until a correct index is entered or ‘q’ for exitting to previous menu

}

else{

devLoc = currIn - 1; // the index starts with 0

tmpName = lstDevices[devLoc].Address;

tmpName.replace(“:”,“,”);

tmpName = String(“AT+PAIR=” + tmpName+“,”+PAIRTO);

tmpRes = getFromMySerialSimple(tmpName);

tmpRes = getFromMySerialSimple(“”); // we do this as the pairing process can take longer, so we cannot rely on the timeout in the readstringuntil()

tmpRes.trim();

if (tmpRes == “OK”)

{

Serial.println ((“You are now paired with the device ” + lstDevices[devLoc].Name +“ [” + lstDevices[devLoc].Address + “]”));

}

else

{

Serial.println (tmpName);

Serial.println (tmpRes);

Serial.println (F(“Could not pair with the device, try again or initiat another search for devices”));

}

currSt = 4;

currIn = 0;

}

break;

}

case 43:{ // Connect with one of the discovered devices

if (currIn == 0){

if (serialStr.equalsIgnoreCase(“q”)){ //‘q’ to quite to previous menu

currSt = 4;

currIn = 0;

}

else{

Serial.println(F(“----------------------------------------------------------”));

Serial.println(F(“Select the device index that you want to connect to, q to abort ”));

Serial.print(F(“(Option No.) ”));

currIn = -3;

}

}

else if (currIn 》 devCount){ // if a numerical input exceeds the number of stored/discovered devices

Serial.println(F(“----------------------------------------------------------”));

Serial.println(F(“The selected index is out of bounds, please select within the list of available devices”));

Serial.print(F(“(Option No.) ”));

currIn = -3;

}

else{

devLoc = currIn - 1; // the index starts with 0

tmpName = lstDevices[devLoc].Address;

tmpName.replace(“:”,“,”);

tmpName = String(“AT+LINK=” + tmpName);

tmpRes = getFromMySerialSimple(tmpName);

tmpRes = getFromMySerialSimple(“”); // we do this as the linking/connecting process can take longer, so we cannot rely on the timeout in the readstringuntil()

tmpRes.trim();

if (tmpRes == “OK”){

Serial.println ((“You are now connected with the device ” + lstDevices[devLoc].Name +“ [” + lstDevices[devLoc].Address + “], type ‘#end’ to disconnect and reset.”));

currSt = 6;

currIn = 0;

}

else{

Serial.println (tmpName);

Serial.println (tmpRes);

Serial.println (F(“Could not connect with the device, try again or initiat another search for devices”));

}

currSt = 4;

currIn = 0;

}

break;

serialStr = “”;

}

case 44:{

if (currIn == 0)

{

if (serialStr.equalsIgnoreCase(“q”))

{

currSt = 4;

currIn = 0;

}

else if (serialStr.equalsIgnoreCase(“a”))

{

tmpRes = getFromMySerial(String(“AT+ADCN”), true, 6);

tmpRes.trim();

int tmpCount = tmpRes.toInt();

for (int i=0; i devCount)

{

Serial.println(F(“----------------------------------------------------------”));

Serial.println(F(“The selected index is out of bounds, please select within the list of available devices”));

Serial.print(F(“(Option No.) ”));

currIn = -4;

}

else

{

devLoc = currIn - 1;

tmpName = lstDevices[devLoc].Address;

tmpName.replace(“:”,“,”);

tmpRes = getFromMySerial(String(“AT+FSAD=”)+ tmpName, true);

tmpRes.trim();

if (tmpRes == “OK”)

{

tmpRes = getFromMySerial(String(“AT+RMSAD=”)+ tmpName, true);

tmpRes.trim();

if (tmpRes == “OK”)

{

Serial.println((“The device ” + lstDevices[devLoc].Name +“ [” + lstDevices[devLoc].Address + “] is removed from the paired devices list”));

}

}

else

{

Serial.println (F(“The device is not within the paired devices list.”));

}

currIn = 0;

}

break;

}

case 45:{

if (currIn == 0)

{

if (serialStr.equalsIgnoreCase(“q”))

{

currSt = 4;

currIn = 0;

}

else

{

Serial.println(F(“----------------------------------------------------------”));

Serial.println(F(“Select the device index that you want to bind with, q to abort ”));

Serial.print(F(“(Option No.) ”));

currIn = -3;

}

}

else if (currIn 》 devCount)

{

Serial.println(F(“----------------------------------------------------------”));

Serial.println(F(“The selected index is out of bounds, please select within the list of available devices”));

Serial.print(F(“(Option No.) ”));

currIn = -3;

}

else

{

devLoc = currIn - 1;

tmpName = lstDevices[devLoc].Address;

tmpName.replace(“:”,“,”);

tmpName = String(“AT+BIND=” + tmpName);

tmpRes = getFromMySerialSimple(tmpName);

tmpRes = getFromMySerialSimple(“”);

tmpRes.trim();

if (tmpRes == “OK”)

{

Serial.println ((“You are now binded with the device ” + lstDevices[devLoc].Name +“ [” + lstDevices[devLoc].Address + “], type ‘#end’ to disconnect and reset.”));

}

else

{

Serial.println (F(“Could not bind with the device, try again or initiat another search for devices”));

}

currSt = 4;

currIn = 0;

}

break;

}

case 6:{

for (int i=0; i《 serialStr.length(); i++)

mySerial.write(serialStr[i]);

break;

}

}

}

serialStr = “”;

}
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