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I made a similar project using only PHPoC here https://www.hackster.io/khanhhs/phpo...mometer-ab199d
Demo
Things Used In This Project
- Arduino UNO & Genuino UNO
- USB Cable for Arduino
- PHPoC WiFi Shield for Arduino
- Waterproof DS18B20 Digital temperature sensor
- Resistor 4.7k ohm
- Jumper wires
Wiring Diagram
Data Flow
Arduino ---> PHPoC WiFi Shield ---> Web browser
Arduino reads temperature from sensor and send the temperature value to PHPoC WiFi Shield. When receiving the temperature value, PHPoC WiFi Shield send it to Web Browser via websocket. JavaScript function visualizes the temperature value on UI.
Note that: PHPoC shield has a built-in program to pass data from Arduino to web browser. Therefore, we don't need to care about it.
What We Need to Do
- Set WiFi information for PHPoC shield (SSID and password)
- Upload new UI to PHPoC shield
- Write Arduino code
Setting WiFi Information for PHPoC Shield
See this instruction http://www.phpoc.com/support/manual/...rk_first_setup
Upload new Web UI to PHPoC Shield
- Create remote_thermometer.php
PHP Code:<!DOCTYPE html>
<html>
<head>
<title>Arduino - PHPoC Shield - Thermometer</title>
<meta name="viewport" content="width=device-width, initial-scale=0.7, maximum-scale=0.7">
<meta charset="utf-8">
<style>
body { text-align: center; font-size: width/2pt; }
h1 { font-weight: bold; font-size: width/2pt; }
h2 { font-weight: bold; font-size: width/2pt; }
button { font-weight: bold; font-size: width/2pt; }
</style>
<script>
var canvas_width = 200, canvas_height = 450;
var ws;
var buffer = "";
function init()
{
var canvas = document.getElementById("remote");
//canvas.style.backgroundColor = "#999999";
canvas.width = canvas_width;
canvas.height = canvas_height;
var ctx = canvas.getContext("2d");
ctx.translate(canvas_width/2, canvas_height - 80);
update_view(0);
}
function connect_onclick()
{
if(ws == null)
{
var ws_host_addr = "<?echo _SERVER("HTTP_HOST")?>";
if((navigator.platform.indexOf("Win") != -1) && (ws_host_addr.charAt(0) == "["))
{
// network resource identifier to UNC path name conversion
ws_host_addr = ws_host_addr.replace(/[\[\]]/g, '');
ws_host_addr = ws_host_addr.replace(/:/g, "-");
ws_host_addr += ".ipv6-literal.net";
}
ws = new WebSocket("ws://" + ws_host_addr + "/thermometer", "text.phpoc");
document.getElementById("ws_state").innerHTML = "CONNECTING";
ws.onopen = ws_onopen;
ws.onclose = ws_onclose;
ws.onmessage = ws_onmessage;
//ws.binaryType = "arraybuffer";
}
else
ws.close();
}
function ws_onopen()
{
document.getElementById("ws_state").innerHTML = "<font color='blue'>CONNECTED</font>";
document.getElementById("bt_connect").innerHTML = "Disconnect";
ws.send("B\r\n");
update_view(0);
}
function ws_onclose()
{
document.getElementById("ws_state").innerHTML = "<font color='gray'>CLOSED</font>";
document.getElementById("bt_connect").innerHTML = "Connect";
ws.onopen = null;
ws.onclose = null;
ws.onmessage = null;
ws = null;
update_view(0);
}
function ws_onmessage(e_msg)
{
e_msg = e_msg || window.event; // MessageEvent
console.log(e_msg.data);
update_view(parseFloat(e_msg.data));
}
function update_view(temp)
{
var canvas = document.getElementById("remote");
var ctx = canvas.getContext("2d");
var radius = 70;
var offset = 5;
var width = 45;
var height = 330;
ctx.clearRect(-canvas_width/2, -350, canvas_width, canvas_height);
if(ws != null)
{
ctx.strokeStyle="blue";
ctx.fillStyle="blue";
}
else
{
ctx.strokeStyle="Gray";
ctx.fillStyle="Gray";
}
//5-step Degree
var x = -width/2;
ctx.lineWidth=2;
for (var i = 0; i <= 100; i+=5)
{
var y = -(height - radius)*i/100 - radius - 5;
ctx.beginPath();
ctx.lineTo(x, y);
ctx.lineTo(x - 20, y);
ctx.stroke();
}
//20-step Degree
ctx.lineWidth=5;
for (var i = 0; i <= 100; i+=20)
{
var y = -(height - radius)*i/100 - radius - 5;
ctx.beginPath();
ctx.lineTo(x, y);
ctx.lineTo(x - 25, y);
ctx.stroke();
ctx.font="20px Georgia";
ctx.textBaseline="middle";
ctx.textAlign="right";
ctx.fillText(i.toString(), x - 35, y);
}
// shape
ctx.lineWidth=16;
ctx.beginPath();
ctx.arc(0, 0, radius, 0, 2 * Math.PI);
ctx.stroke();
ctx.beginPath();
ctx.rect(-width/2, -height, width, height);
ctx.stroke();
ctx.beginPath();
ctx.arc(0, -height, width/2, 0, 2 * Math.PI);
ctx.stroke();
ctx.fillStyle="#e6e6ff";
ctx.beginPath();
ctx.arc(0, 0, radius, 0, 2 * Math.PI);
ctx.fill();
ctx.beginPath();
ctx.rect(-width/2, -height, width, height);
ctx.fill();
ctx.beginPath();
ctx.arc(0, -height, width/2, 0, 2 * Math.PI);
ctx.fill();
// temperature value
if(ws != null)
ctx.fillStyle="#ff1a1a";
else
ctx.fillStyle="Gray";
ctx.beginPath();
ctx.arc(0, 0, radius - offset, 0, 2 * Math.PI);
ctx.fill();
temp = Math.round(temp);
var y = (height - radius)*temp/100.0 + radius + 5;
ctx.beginPath();
ctx.rect(-width/2 + offset, -y, width - 2*offset, y);
ctx.fill();
if(ws != null)
{
ctx.fillStyle="white";
ctx.font="bold 34px Georgia";
ctx.textBaseline="middle";
ctx.textAlign="center";
ctx.fillText(temp.toString() + "°C", 0, 0);
}
}
window.onload = init;
</script>
</head>
<body>
<p>
<h1>Arduino - Web Thermometer</h1>
</p>
<canvas id="remote"></canvas>
<h2>
<p>
WebSocket : <span id="ws_state">null</span>
</p>
<button id="bt_connect" type="button" onclick="connect_onclick();">Connect</button>
</h2>
</body>
</html> - Upload it to PHPoC shield using PHPoC debugger according to this instruction http://www.phpoc.com/support/manual/...d=major_upload
Write Arduino Code
- Install three following libraries (see instruction https://www.arduino.cc/en/Guide/Libraries):
- PHPoC Library for Arduino https://github.com/phpoc/arduino
- Follow the instruction in this DS18B20 temperature sensor tutorials to install library for temperature sensor
- Upload Arduino code (on code section) to Arduino
Code:#include <OneWire.h> #include <DallasTemperature.h> #include "SPI.h" #include "Phpoc.h" // Data wire is plugged into port 8 on the Arduino OneWire oneWire(8); DallasTemperature sensors(&oneWire); PhpocServer server(80); boolean alreadyConnected = false; void setup() { Serial.begin(9600); while(!Serial) ; sensors.begin(); Phpoc.begin(PF_LOG_SPI | PF_LOG_NET); server.beginWebSocket("thermometer"); Serial.print("WebSocket server address : "); Serial.println(Phpoc.localIP()); } void loop() { // when the client sends the first byte, say hello: PhpocClient client = server.available(); if (client) { sensors.requestTemperatures(); float temp = sensors.getTempCByIndex(0); String txtMsg = String(temp) + "\r\n"; char buf[txtMsg.length()]; txtMsg.toCharArray(buf, txtMsg.length()); server.write(buf, txtMsg.length()); delay(300); } }
Testing
- Click serial button on Arduino IDE to see the IP address.
- Open web browser, type http:// replace_ip_address/remote_thermometer.php
- Click connect button and test it.