I'm trying to control a servo with an android phone and an arduino via bluetooth but the data in the arduino is received as a char, and the arduino doesn't know when all the data is received and the servo don't move properly. The arduino code is this:
#include
Servo myservo;
char val; // variable to receive data from the serial port
int ledpin = 13; // LED connected to pin 48 (on-board LED)
void setup() {
pinMode(ledpin, OUTPUT); // pin 48 (on-board LED) as OUTPUT
Serial.begin(9600); // start serial communication at 9600bps
myservo.attach(9);
}
void loop() {
if( Serial.available() ) // if data is available to read
{
val = Serial.read(); // read it and store it in 'val'
}
if( val - 0 >= 0 && val - 0 <= 180){
}
// Serial.print("Recibido");
delay(100); // wait 100ms for next reading
}
What can I do to get the correct value from "val" to control the servo?
You can send multiple chars if you need them. Simple store each new char into an array and program your android program to send a specific byte that indicates the ending of the val reading.
Checking this "ending" byte each time you perform a read from serial will tell you if this char is to store or to convert the previous stored chars into an integer or whatever data type you need it.
Than simply converting that array will tell you the correct val.
Related
I'm using a bluetooth modul (HC-05) to detect if an android phone is in the modul's range.
I tried to connect with HC-05 (as master) and a PIC16f887 to the phone, but I can't. Searched many pages on net how to use HC-05 as master, but no solution.
So, finally I could do this by modul get my phone's BT name. If it could, my phone is in range.
But now I want my phone to detect this "remote name query" and play some sound then.
Sorry for my poor english :)
Im guessing you want something like this: VIDEO
Lets start with the basics:
The typical default factory settings for a new Bluetooth HC-05 module are:
Default Bluetooth Name: “HC-05”
Default Password: 1234 or 0000
Default Communication: Slave Device
Default Mode: Data Mode
Default Data Mode Baud Rate: 9600, 8, N, 1
Default Command Mode Baud Rate: 38400, 8, N, 1
Default firmware: LINVOR
1. To TEST Bluetooth connections from your android device use id suggest you use this APK
2. Connect the HC-05 BT module as shown in the diagram
3. Initialize the UART receiver at the microcontroller end (side)
(code includes 2 leds for pin 33 and pin 34)
/*
* LAB Number: 17
* LAB Name: Bluetooth Module HC-05 Interfacing (Smartphone -> MCU)
* Author: Khaled Magdy
* For More Information Visit My Website # DeepBlueMbedded.com
*
*/
#include <xc.h>
#include <stdint.h>
#include "config.h"
#define _XTAL_FREQ 4000000
//--[ Control Data ]--
#define Blue_LED_ON 49
#define Blue_LED_OFF 50
#define Yellow_Toggle 51
//--------------------------------
// Functions Declarations
void UART_RX_Init(void);
// Globals
uint8_t UART_Buffer = 0;
//--------------------------------
// Main Routine
void main(void)
{
//--[ Peripherals & IO Configurations ]--
UART_RX_Init(); // Initialize The UART in Master Mode # 9600bps
TRISB0 = 0; // Blue LED (Switch)
TRISB1 = 0; // Yellow LED (Toggle)
RB0 = 0; // Initially OFF
RB1 = 0; // Initially OFF
//---------------------------
while(1)
{
}
return;
}
//--------------------------------
// Functions Definitions
void UART_RX_Init()
{
BRGH = 1; // Set For High-Speed Baud Rate
SPBRG = 25; // Set The Baud Rate To Be 9600 bps
// Enable The Ascynchronous Serial Port
SYNC = 0;
SPEN = 1;
// Set The RX-TX Pins to be in UART mode (not io)
TRISC6 = 1; // As stated in the datasheet
TRISC7 = 1; // As stated in the datasheet
//--[ Enable UART Receiving Interrupts ]--
RCIE = 1; // UART Receving Interrupt Enable Bit
PEIE = 1; // Peripherals Interrupt Enable Bit
GIE = 1; // Global Interrupt Enable Bit
//------------------
CREN = 1; // Enable Data Continous Reception
}
void interrupt ISR (void)
{
if (RCIF == 1)
{
UART_Buffer = RCREG; // Read The Received Data Buffer
// This could have been done within the main loop. Since it's not
// Excessive processing, so it's OK to do it here below
if(UART_Buffer == Blue_LED_ON)
RB0 = 1; // Blue LED ON
if(UART_Buffer == Blue_LED_OFF)
RB0 = 0; // Blue LED OFF
if(UART_Buffer == Yellow_Toggle)
RB1 = ~RB1; // Toggle Yellow LED
RCIF = 0; // Clear The Interrupt Flag
}
}
NOTE The Data Bytes (49, 50, and 51) are the ASCII equivalents for the numeric characters (1, 2, and 3 respectively).
4. Download this apk to send commands to your HC05: APK
For more info follow Reference: LINK
We are developping an app that uses Bluetooth library to communicate with an Arduino in bluetooth via an HC-05 module. We made a dummy configuration to test the delay without any computation from eather the Arduino or the app and we have a huge delay of about 1 second between a request and an answer...
Protocol looks easy : Android send byte -2 and if byte received is -2, Arduino send -6, -9 and Android answer again and again.
Android Code :
h = new Handler() {
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case RECIEVE_MESSAGE: // if receive massage
byte[] readBuf = (byte[]) msg.obj;
for(int i=0;i < readBuf.length;i++)
{
if((int) readBuf[i] != 0) {
txtArduino.append(String.valueOf((int) readBuf[i]) + ", ");
}
}
byte[] msg = {-2};
mConnectedThread.writeByte(msg);
break;
}
};
};
Arduino Code :
const int receveidBuffLen = 8*4;
void setup() {
Serial.begin(115200);
}
void loop() {
if (Serial.available() > 0)
{
byte buff[receveidBuffLen];
Serial.readBytes(buff, receveidBuffLen);
for(int i=0; i < receveidBuffLen;i++)
{
if(buff[i] == (byte) -2) // 254
{
byte message[2] = {(byte) -6, (byte) -9};
Serial.write(message, 2);
Serial.flush();
}
}
}
delay(3);
}
Does anyone know where the delay comes from?
We changed the HC05 baudrate (from 9600 to 115 200) : nothing happened. We changed HC05 with another : nothing happened. We used the Blue2Serial library (Bluetooth as SPP) before and delay was the same... We used another controler (ESP8266) and delay still was 1 second...
Looks like this string is an issue:
Serial.readBytes(buff, receveidBuffLen);
Where receveidBuffLen is 32.
Although you get single byte at a time, you're trying to read 32 of them. Of course, if there are no more bytes, the code will be stuck until timeout.
Furthermore, after bytes is read, you never check how many bytes were actually read, but do scan whole the array from bottom to top:
for(int i=0; i < receveidBuffLen;i++)
instead, you have to do something like this:
int bytesAvailable = Serial.available();
if (bytesAvailable > 0)
{
byte buff[receveidBuffLen];
int bytesToRead = (bytesAvailable < receveidBuffLen) ? bytesAvailable : receveidBuffLen;
// Read no more than the buffer size, but not more than available
int bytesActuallyRead = Serial.readBytes(buff, bytesToRead);
for(int i=0; i < bytesActuallyRead;i++)
...
There are a couple problems with the code that might cause delays:
delay function at end of loop - This will slow down the processing that the Ardunio can keep up with
Calling Serial.flush() - This will block the processing loop() until the internal TX serial buffer is empty. That means the Arduino is blocked and new RX data can pile up, slowing the response time.
Calling Serial.readBytes() - You should focus on the smallest unit of data and process that each loop() iteration. If you are trying to deal with multiple message per loop, that will slow now the loop time causing a delay.
You can try to implement a SerialEvent pattern on the Arduino. We will only read one byte at a time from the serial buffer, keeping the processing that the loop() function has todo to a bare minimum. If we receive the -2 byte we will mark a flag. If the flag is marked the loop() function will call the Serial.write() function but will not block for the data to transmit. Here is a quick example.
bool sendMessage = false;
byte message[2] = {(byte) -6, (byte) -9};
void loop()
{
if (sendMessage == true)
{
Serial.write(message, 2);
sendMessage = false;
}
}
/*
SerialEvent occurs whenever a new data comes in the hardware serial RX. This
routine is run between each time loop() runs, so using delay inside loop can
delay response. Multiple bytes of data may be available.
*/
void serialEvent()
{
while (Serial.available())
{
// get the new byte:
byte inChar = ((byte) Serial.read());
if (inChar == ((byte) -2))
{
sendMessage = true;
}
}
}
We just find some solutions by ourselves and want to share them :
Initial situation : 1050 ms for an answer. Alls solutions are independent and done with the initial situation.
Remove Serial.flush() : 1022 ms.
Add a simple Serial.setTimeout(100) in Arduino Code : 135 ms. (Oh man!)
Add a simple timeout to inputStream of 100ms in Android : 95 ms.
Which solution is the best, we can't say but it works now...
I am new to Arduino and I have been working on a problem that has been troubling me for a few days.
I have an Arduino Uno and an HC-05 Bluetooth module.
Basically I want to send String and Int data together through Bluetooth.
CODE
#include <SoftwareSerial.h>
SoftwareSerial BTSerial(10, 11); // RX | TX
void setup(void) {
// Arduino setup
Serial.begin(9600);
// setting the baud rate of bluetooth
BTSerial.begin(38400); // HC-05 default speed in AT command more
}
void loop(void) {
int num = 123;
BTSerial.write("#"); // Works
BTSerial.write(num); // works
BTSerial.write(String(num) + "#");
// Error: no matching function for call to 'SoftwareSerial::write(StringSumHelper&)'
}
Also the result string should have '#' character at last.
According to the Arduino Website, it has 2 functions.
- Serial.write(val)
- Serial.write(str)
Any help appreciated.
Thank you.
write is for sending raw bytes. You want to use Serial.print instead.
if you want to send String from an another device to arduino, your code sould be like this:
#include <SoftwareSerial.h>
SoftwareSerial BT(3, 4);
String bt = "";
void setup() {
BT.begin(9600);
Serial.begin(9600);
}
void loop() {
if(BT.available()){
bt = BT.readString();
}
Serial.println(bt);
while(!BT.available());
}
the above code, waits for your bluetooth module to recieve any data and reads a String from it and prints it in Serial.
In order to send Int, you can read a String and parse it to Int.
I am working on a project for college and I am using android and arduino. The project I am trying to build is a quad copter flight controller in arduino. I have all the necessary equipment for the project but, I've hit a road block with the code I am using. The idea is to have the an android phone control the quad copter and I have a HTTP server on the arduino that can communicate with my phone. The only problem is when I create the required servo motors in the arduino sketch and assign them pins the http server will not run in the setup of the arduino sketch. I have not idea why this is happening and would appreciate any help necessary. Thanks in advance. A copy of my code will be displayed below.
/***************************************************
Adafruit CC3000 Breakout/Shield Simple HTTP Server
This is a simple implementation of a bare bones
HTTP server that can respond to very simple requests.
Note that this server is not meant to handle high
load, concurrent connections, SSL, etc. A 16mhz Arduino
with 2K of memory can only handle so much complexity!
This server example is best for very simple status messages
or REST APIs.
See the CC3000 tutorial on Adafruit's learning system
for more information on setting up and using the
CC3000:
http://learn.adafruit.com/adafruit-cc3000-wifi
Requirements:
This sketch requires the Adafruit CC3000 library. You can
download the library from:
https://github.com/adafruit/Adafruit_CC3000_Library
For information on installing libraries in the Arduino IDE
see this page:
http://arduino.cc/en/Guide/Libraries
Usage:
Update the SSID and, if necessary, the CC3000 hardware pin
information below, then run the sketch and check the
output of the serial port. After connecting to the
wireless network successfully the sketch will output
the IP address of the server and start listening for
connections. Once listening for connections, connect
to the server IP from a web browser. For example if your
server is listening on IP 192.168.1.130 you would access
http://192.168.1.130/ from your web browser.
Created by Tony DiCola and adapted from HTTP server code created by Eric Friedrich.
This code was adapted from Adafruit CC3000 library example
code which has the following license:
Designed specifically to work with the Adafruit WiFi products:
----> https://www.adafruit.com/products/1469
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried & Kevin Townsend for Adafruit Industries.
BSD license, all text above must be included in any redistribution
****************************************************/
#include <Adafruit_CC3000.h>
#include <Adafruit_VC0706.h>
#include <SoftwareSerial.h>
#include <SPI.h>
#include "utility/debug.h"
#include "utility/socket.h"
#include <Servo.h>
// These are the interrupt and control pins
#define ADAFRUIT_CC3000_IRQ 3 // MUST be an interrupt pin!
// These can be any two pins
#define ADAFRUIT_CC3000_VBAT 5
#define ADAFRUIT_CC3000_CS 10
// Use hardware SPI for the remaining pins
// On an UNO, SCK = 13, MISO = 12, and MOSI = 11
Adafruit_CC3000 cc3000 = Adafruit_CC3000(ADAFRUIT_CC3000_CS, ADAFRUIT_CC3000_IRQ, ADAFRUIT_CC3000_VBAT,
SPI_CLOCK_DIVIDER); // you can change this clock speed
#define WLAN_SSID "AndroidAP" // cannot be longer than 32 characters!
#define WLAN_PASS "tyhv5688"
// Security can be WLAN_SEC_UNSEC, WLAN_SEC_WEP, WLAN_SEC_WPA or WLAN_SEC_WPA2
#define WLAN_SECURITY WLAN_SEC_WPA2
#define LISTEN_PORT 80 // What TCP port to listen on for connections.
// The HTTP protocol uses port 80 by default.
#define MAX_ACTION 10 // Maximum length of the HTTP action that can be parsed.
#define MAX_PATH 64 // Maximum length of the HTTP request path that can be parsed.
// There isn't much memory available so keep this short!
#define BUFFER_SIZE MAX_ACTION + MAX_PATH + 20 // Size of buffer for incoming request data.
// Since only the first line is parsed this
// needs to be as large as the maximum action
// and path plus a little for whitespace and
// HTTP version.
#define TIMEOUT_MS 500 // Amount of time in milliseconds to wait for
// an incoming request to finish. Don't set this
// too high or your server could be slow to respond.
Adafruit_CC3000_Server httpServer(LISTEN_PORT);
Servo m1, m2, m3, m4;
uint8_t buffer[BUFFER_SIZE+1];
int bufindex = 0;
char action[MAX_ACTION+1];
char path[MAX_PATH+1];
int speed = 0;
void setup(void)
{
// Give name to robot
Serial.begin(9600);
Serial.println(F("\nHello, CC3000!\n"));
Serial.print("Free RAM: "); Serial.println(getFreeRam(), DEC);
// Initialise the module
Serial.println(F("\nInitializing..."));
m1.attach(5);
m2.attach(9);
m3.attach(10);
m4.attach(11);
if (!cc3000.begin())
{
Serial.println(F("Couldn't begin()! Check your wiring?"));
while(1);
}
Serial.print(F("\nAttempting to connect to ")); Serial.println(WLAN_SSID);
if (!cc3000.connectToAP(WLAN_SSID, WLAN_PASS, WLAN_SECURITY)) {
Serial.println(F("Failed!"));
while(1);
}
Serial.println(F("Connected!"));
Serial.println(F("Request DHCP"));
while (!cc3000.checkDHCP())
{
delay(100); // ToDo: Insert a DHCP timeout!
}
// Display the IP address DNS, Gateway, etc.
while (! displayConnectionDetails()) {
delay(1000);
}
// Start listening for connections
httpServer.begin();
Serial.println(F("Listening for connections..."));
}
void loop(void)
{
// Try to get a client which is connected.
Adafruit_CC3000_ClientRef client = httpServer.available();
if (client) {
Serial.println(F("Client connected."));
// Process this request until it completes or times out.
// Note that this is explicitly limited to handling one request at a time!
// Clear the incoming data buffer and point to the beginning of it.
bufindex = 0;
memset(&buffer, 0, sizeof(buffer));
// Clear action and path strings.
memset(&action, 0, sizeof(action));
memset(&path, 0, sizeof(path));
// Set a timeout for reading all the incoming data.
unsigned long endtime = millis() + TIMEOUT_MS;
// Read all the incoming data until it can be parsed or the timeout expires.
bool parsed = false;
while (!parsed && (millis() < endtime) && (bufindex < BUFFER_SIZE)) {
if (client.available()) {
buffer[bufindex++] = client.read();
}
parsed = parseRequest(buffer, bufindex, action, path);
}
// Handle the request if it was parsed.
if (parsed) {
Serial.println(F("Processing request"));
Serial.print(F("Action: ")); Serial.println(action);
Serial.print(F("Path: ")); Serial.println(path);
// Check the action to see if it was a GET request.
if (strcmp(action, "GET") == 0) {
// Respond with the path that was accessed.
// First send the success response code.
client.fastrprintln(F("HTTP/1.1 200 OK"));
// Then send a few headers to identify the type of data returned and that
// the connection will not be held open.
client.fastrprintln(F("Content-Type: text/plain"));
client.fastrprintln(F("Connection: close"));
client.fastrprintln(F("Server: Adafruit CC3000"));
// Send an empty line to signal start of body.
client.fastrprintln(F(""));
// Now send the response data.
client.fastrprintln(F("Connected"));
}
else if (strcmp(action, "POST") == 0) {
bool start = true;
startMotors(start);
client.fastrprintln(F("HTTP/1.1 200 OK"));
// Then send a few headers to identify the type of data returned and that
// the connection will not be held open.
client.fastrprintln(F("Content-Type: text/plain"));
client.fastrprintln(F("Connection: close"));
client.fastrprintln(F("Server: Adafruit CC3000"));
// Send an empty line to signal start of body.
client.fastrprintln(F(""));
// Now send the response data.
client.fastrprintln(F("Motors are starting"));
}
else {
// Unsupported action, respond with an HTTP 405 method not allowed error.
client.fastrprintln(F("HTTP/1.1 405 Method Not Allowed"));
}
}
// Wait a short period to make sure the response had time to send before
// the connection is closed (the CC3000 sends data asyncronously).
delay(100);
}
client.close();
}
void startMotors(bool start)
{
if(start == true)
{
for (speed = 0; speed<60; speed++)
{
m1.write(speed);
m2.write(speed);
m3.write(speed);
m4.write(speed);
}
}
}
// Return true if the buffer contains an HTTP request. Also returns the request
// path and action strings if the request was parsed. This does not attempt to
// parse any HTTP headers because there really isn't enough memory to process
// them all.
// HTTP request looks like:
// [method] [path] [version] \r\n
// Header_key_1: Header_value_1 \r\n
// ...
// Header_key_n: Header_value_n \r\n
// \r\n
bool parseRequest(uint8_t* buf, int bufSize, char* action, char* path) {
// Check if the request ends with \r\n to signal end of first line.
if (bufSize < 2)
return false;
if (buf[bufSize-2] == '\r' && buf[bufSize-1] == '\n') {
parseFirstLine((char*)buf, action, path);
return true;
}
return false;
}
// Parse the action and path from the first line of an HTTP request.
void parseFirstLine(char* line, char* action, char* path) {
// Parse first word up to whitespace as action.
char* lineaction = strtok(line, " ");
if (lineaction != NULL)
strncpy(action, lineaction, MAX_ACTION);
// Parse second word up to whitespace as path.
char* linepath = strtok(NULL, " ");
if (linepath != NULL)
strncpy(path, linepath, MAX_PATH);
}
// Tries to read the IP address and other connection details
bool displayConnectionDetails(void)
{
uint32_t ipAddress, netmask, gateway, dhcpserv, dnsserv;
if(!cc3000.getIPAddress(&ipAddress, &netmask, &gateway, &dhcpserv, &dnsserv))
{
Serial.println(F("Unable to retrieve the IP Address!\r\n"));
return false;
}
else
{
Serial.print(F("\nIP Addr: ")); cc3000.printIPdotsRev(ipAddress);
Serial.print(F("\nNetmask: ")); cc3000.printIPdotsRev(netmask);
Serial.print(F("\nGateway: ")); cc3000.printIPdotsRev(gateway);
Serial.print(F("\nDHCPsrv: ")); cc3000.printIPdotsRev(dhcpserv);
Serial.print(F("\nDNSserv: ")); cc3000.printIPdotsRev(dnsserv);
Serial.println();
return true;
}
}
I 'm not sure of this, but it would seem that you are trying to use pins 5 and 10 both in the motor drivers and the CC3000 shield. You should try to use separate pins for each (e.g. drive the motors with pins 7,8,9,11).
My purpose is to use Arduino to set up communication between a PC and an Android device using an HC-05 bluetooth module.
I use the USB communication between the PC and the Arduino (Serial Monitor) and a SoftwareSerial to connect to the HC-05.
My problem is that the communication works well from BT to the PC, but doesn't work as expected in the other way. When sending from the PC to BT all the characters sent are received by the BT device only when I close the Serial Monitor on the PC or when I reset the Arduino.
I've excluded a problem with the BT Module or the Android application because if in Arduino I implement an "ECHO" code (write in Android and the send in Android) everything works fine.
With the Arduino code posted below the expected behaviour is: Arduino reset-> Hello word sent, Serial monitor opened-> nothing happens, character written on serial monitor-> character received on BT, character written on BT-> character received on Serial Monitor, Serial monitor closed-> nothing happens.
The real behaviour is: Arduino reset-> Hello word sent, Serial monitor opened-> 2 Hello word on BT and 1 ("goodnight") on PC, character written on serial monitor-> nothing, character written on BT-> character received on Serial Monitor, Serial monitor closed-> previous written character(s) in serial monitor received + Hello Word.
How can I fix this problem?
Code:
#include <SoftwareSerial.h>
SoftwareSerial mySerial(2, 3); // RX, TX
int a=0;
char c;
char d;
void setup() {
Serial.begin(9600);
Serial.println("Goodnight moon!");
mySerial.begin(9600);
mySerial.println("Hello, world?");
}
void loop() {
delay(10);
if (Serial.available()) {
c=Serial.read();
delay(10);
Serial.write(c);
}
delay(10);
if (mySerial.available()) {
d=mySerial.read();
delay(10);
mySerial.write(d);
}
}
This code is working for me on an Arduino Mini Pro (should be the same as UNO) with an HC-05. I have the HC-05 paired with my laptop. Using HyperTerminal on the COM port associated with the HC-05 and the Arduino serial console, I can send messages bidirectionally. The Serial.println statements show up in the Hyperterminal window like they should.
#include <SoftwareSerial.h>
#define rxPin 8
#define txPin 7
SoftwareSerial mySerial(rxPin, txPin); // RX, TX
char myChar ;
void setup() {
Serial.begin(9600);
Serial.println("Goodnight moon!");
mySerial.begin(9600);
mySerial.println("Hello, world?");
}
void loop(){
while(mySerial.available()){
myChar = mySerial.read();
Serial.print(myChar);
}
while(Serial.available()){
myChar = Serial.read();
mySerial.print(myChar);
}
}
I have implemented a serial communication between Arduino Uno and PC and this was my code, hope it can help:
int data;
char character;
int start_flag = 0;
void setup() {
Serial.begin(921600);
pinMode(2, OUTPUT);
}
void loop() {
if(Serial.available() > 0){
character = (char) Serial.read();
if(character == 's') {
start_flag = 1;
}
if(character == 't') {
start_flag = 0;
}
}
if (start_flag == 1) {
Serial.print(data); //data that was acquired by internal ADC
}
}
You could try this. It's about the simplest code you can use when testing Arduino bluetooth <-> C# communication. Note: the code was tested by connecting PIN1(TX) <-> MODULE RX, PIN2(RX) <-> MODULE TX and dividing the PIN1(TX) 5V to 2,5V before feeding it to the module.
Hope this helps all that are trying this!
Use this serial setup. With this code I can receive and send date to bluetooth from Serial Monitor
void setup(){
Serial.begin(9600); // Begin the serial monitor at 9600bps
bluetooth.begin(115200); // The Bluetooth Mate defaults to 115200bps
bluetooth.print("$"); // Print three times individually
bluetooth.print("$");
bluetooth.print("$"); // Enter command mode
delay(100); // Short delay, wait for the Mate to send back CMD
bluetooth.println("U,9600,N"); // Temporarily Change the baudrate to 9600, no parity
// 115200 can be too fast at times for NewSoftSerial to relay the data reliably
bluetooth.begin(9600); // Start bluetooth serial at 9600
pinMode(led, OUTPUT);
pinMode(buttonPin1, INPUT);
pinMode(buttonPin2, INPUT);
}
For more information, visit
http://www.circuitmagic.com/arduino/arduino-and-bluetooth-hc-06-to-control-the-led-with-android-device/
I recommend to use this app for testing:
https://play.google.com/store/apps/details?id=com.vagoscorp.virtualterminal
It let you see and send bytes as bytes(number from 0b00000000 to 0b11111111 (0 to 255 in decimal))
so you can make a simple echo firmware to test if your baudrate is correct and with that working, begin sending commands to turn on/off some LEDs
this is an echo code example:
char dato = 0;
void setup() {
Serial.begin(9600);//9600 is the default baudrate of the HC-05 (you can change it by AT commands, google it if you want)
//pinMode(13, OUTPUT); //enable this pin if you want to use de LED idea
//digitalWrite(13, HIGH);
}
//////////////////////////////////////////////////////////////////////////
void serialEvent() { //if you have received serial data
while (Serial.available() > 0) {
char dato = (byte)Serial.read();//save the byte
Serial.write(dato);//send the just received byte (echo)
}
}
///////////////////////////////////////////////////////////////////////////
void loop() {
}
I hope it helps you
Had the same problem, you have to view the BT module as 2 different baud rates on the wired side and the radio side. The radio side is set by whatever you connect at through putty, the wired side is programmed via AT commands. HC-05 defaults at 38400.