I have followed a tutorial controlling an Arduino uno via the hm-10 Bluetooth module from an android phone, I then changed the uuid to the one for my module. However, when I run the app on evothings, the connect button does not seem to do anything. can anyone guide me towards what I may be doing wrong ?
https://evothings.com/control-an-led-using-hm-10-ble-module-an-arduino-and-a-mobile-app/
I have the Lanmu Hm-10 which I'm pretty sure is a clone, so I don't know how that affects it
clare:
can anyone guide me towards what I may be doing wrong ?
Please post your program so we can see what you are trying.
And when posting code please use the code button </>so your code looks like thisand is easy to copy to a text editor See How to use the Forum
…R
code]<!DOCTYPE html>
<!DOCTYPE html>
<html>
<!--
This is an app that demonstrates how to control an Arduio board
using BLE (Bluetooth Low Energy).
Please note that you must use a HM-10 compatible module for this example to work.
-->
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, user-scalable=no,
shrink-to-fit=no, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0" />
<title>HM-10 and Arduino LED On/Off BLE</title>
<style>
@import 'ui/css/evothings-app.css';
</style>
<script>
// Redirect console.log to Evothings Workbench.
if (window.hyper && window.hyper.log) { console.log = hyper.log }
window.onerror = function(msg, url, line)
{
console.log(msg + ": " + url + ":" + line);
};
</script>
<script src="cordova.js"></script>
<script src="libs/jquery/jquery.js"></script>
<script src="libs/evothings/evothings.js"></script>
<script src="libs/evothings/ui/ui.js"></script>
<script src="libs/evothings/arduinoble/arduinoble.js"></script>
</head>
<body ontouchstart=""><!-- ontouchstart="" enables low-delay CSS transitions. -->
<header>
<button class="back" onclick="history.back()">
<img src="ui/images/arrow-left.svg" />
</button>
<img class="logotype" src="ui/images/logo.svg" alt="Evothings" />
<!--<button class="menu" onclick=""><img src="ui/images/menu.svg" /></button>-->
</header>
<h1>HM-10 and Arduino LED On/Off BLE</h1>
<p id="info">Initializing...</p>
<button class="yellow wide" onclick="app.connect()">CONNECT</button>
<button class="green wide big" onclick="app.ledOn()">LED ON</button>
<button class="red wide big" onclick="app.ledOff()">LED OFF</button>
<script>
// Application object.
var app = {}
// Connected device.
app.device = null;
// Turn on LED.
app.ledOn = function()
{
app.device && app.device.writeDataArray(new Uint8Array([1]), '0000ffe0-0000-1000-8000-00805f9b34fb');
}
// Turn off LED.
app.ledOff = function()
{
app.device && app.device.writeDataArray(new Uint8Array([0]), '0000ffe0-0000-1000-8000-00805f9b34fb');
}
app.showMessage = function(info)
{
document.getElementById('info').innerHTML = info
};
// Called when BLE and other native functions are available.
app.onDeviceReady = function()
{
app.showMessage('Touch the connect button to begin.');
};
app.connect = function()
{
evothings.arduinoble.close();
evothings.arduinoble.connect(
'BT05', // Name of the module.
function(device)
{
app.device = device;
app.showMessage('Connected! Touch buttons to turn LED on/off.');
},
function(errorCode)
{
app.showMessage('Connect error: ' + errorCode + '.');
});
};
document.addEventListener(
'deviceready',
function() { evothings.scriptsLoaded(app.onDeviceReady) },
false);
</script>
</body>
</html>
The HTML code in Reply #4 is not the program on your Arduino. Post your Arduino program.
...R
#include <SoftwareSerial.h>
#define LED_PIN 2
SoftwareSerial mySerial(7, 8); // RX, TX
// Connect HM10 Arduino Uno
// Pin 1/TXD Pin 7
// Pin 2/RXD Pin 8
void setup() {
Serial.begin(9600);
// If the baudrate of the HM-10 module has been updated,
// you may need to change 9600 by another value
// Once you have found the correct baudrate,
// you can update it using AT+BAUDx command
// e.g. AT+BAUD0 for 9600 bauds
mySerial.begin(9600);
}
void loop() {
int c;
if (mySerial.available()) {
c = mySerial.read();
Serial.println("Got input:");
if (c != 0)
{
// Non-zero input means "turn on LED".
Serial.println(" on");
digitalWrite(LED_PIN, HIGH);
}
else
{
// Input value zero means "turn off LED".
Serial.println(" off");
digitalWrite(LED_PIN, LOW);
}
}
}
A few words of commentary, or just friendly chat would be nice.
This does not look right
if (c != 0)
{
// Non-zero input means "turn on LED".
Serial.println(" on");
digitalWrite(LED_PIN, HIGH);
}
else
{
// Input value zero means "turn off LED".
Serial.println(" off");
digitalWrite(LED_PIN, LOW);
}
}
I wonder if you mean
if (c != '0')
in other words the character '0' rather than a byte value of 0. I guess it's possible you are sending the byte value of 0 but it seems unlikely. Debugging is much easier if you send data as human readable characters.
...R