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ESP12E_Chart_D3JS.ino
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/*
NodeMCU ESP12E Chart (D3JS)
Author : ChungYi Fu (Kaohsiung, Taiwan) 2018-08-05 22:00
https://www.facebook.com/francefu
Command Format :
http://STAIP (default:LineChart)
http://STAIP/?chartType=LineChart
http://STAIP/?chartType=AreaChart
http://STAIP/?showCount=value
http://STAIP/?timeInterval=value
http://STAIP/?chartWidth=value
http://STAIP/?chartHeight=value
http://STAIP/?yScaleMax=value
http://STAIP/?yScaleMin=value
http://STAIP/?xTitle=string
http://STAIP/?yTitle1=string
http://STAIP/?yTitle2=string
http://STAIP/?settings=showCount;timeInterval;chartWidth;chartHeight;xTitle;yTitle1;yTitle2;yScaleMax;yScaleMin
(It is necessary to load js file from D3JS webside,so you must connect your computer to the Internet.)
http://APIP/?resetwifi=ssid;password
Command Format :
http://APIP/?cmd=str1;str2;str3;str4;str5;str6;str7;str8;str9
http://STAIP/?cmd=str1;str2;str3;str4;str5;str6;str7;str8;str9
If you don't need to get response from ESP8266 and want to execute commands quickly,
you can append a parameter value "stop" at the end of command.
For example:
http://192.168.4.1/?digitalwrite=gpio;value;stop
http://192.168.4.1/?restart=stop
*/
String chartType="LineChart"; //LineChart or AreaChart
int showCount=10; //Data records
int timeInterval=5000; //Sensor time interval (ms)
int chartWidth=800; //Chart width (px)
int chartHeight=400; //Chart height (px)
int yScaleMax=200; //Maximum value of the Y axis
int yScaleMin=-100; //Minimum value of the Y axis
String xTitle="Time"; //Title of the X axis
String yTitle1="Temperature(°F)"; //Title of the Y axis
String yTitle2="Humidity(%)"; //Title of the Y axis
String chartData=""; //Data Format: hh:mm:ss,data1,data2;
unsigned long time1,time2;
int count=0;
String yTitle="";
#include <ESP8266WiFi.h>
// Enter your WiFi ssid and password
const char* ssid = ""; //your network SSID
const char* password = ""; //your network password
const char* apssid = "ESP12E Chart";
const char* appassword = "12345678"; //AP password require at least 8 characters.
WiFiServer server(80);
String Feedback="", Command="",cmd="",str1="",str2="",str3="",str4="",str5="",str6="",str7="",str8="",str9="";
byte ReceiveState=0,cmdState=1,strState=1,questionstate=0,equalstate=0,semicolonstate=0;
void setup()
{
Serial.begin(115200);
delay(10);
WiFi.mode(WIFI_AP_STA);
//WiFi.config(IPAddress(192, 168, 201, 100), IPAddress(192, 168, 201, 2), IPAddress(255, 255, 255, 0));
WiFi.begin(ssid, password);
delay(1000);
Serial.println("");
Serial.print("Connecting to ");
Serial.println(ssid);
long int StartTime=millis();
while (WiFi.status() != WL_CONNECTED)
{
delay(500);
if ((StartTime+5000) < millis()) break;
}
Serial.println("");
Serial.println("STAIP address: ");
Serial.println(WiFi.localIP());
if (WiFi.status() == WL_CONNECTED)
WiFi.softAP((WiFi.localIP().toString()+"_"+(String)apssid).c_str(), appassword);
else
WiFi.softAP(apssid, appassword);
//WiFi.softAPConfig(IPAddress(192, 168, 4, 1), IPAddress(192, 168, 4, 1), IPAddress(255, 255, 255, 0));
Serial.println("");
Serial.println("APIP address: ");
Serial.println(WiFi.softAPIP());
server.begin();
time1 = millis();
}
void loop()
{
time2 = millis();
if (time2>=(time1+timeInterval))
{
//Sensor Data
int Temperature = rand()%300-100;
int Humidity = rand()%100;
yTitle=yTitle1+"="+String(Temperature)+" "+yTitle2+"="+String(Humidity);
int t=time2/1000;
t%=86400;
chartData=chartData+String(t/3600)+":"+String((t%3600)/60)+":"+String(t%60)+","+Temperature+","+Humidity+";";
time1 = time2;
if (count==showCount)
chartData=chartData.substring(chartData.indexOf(";")+1);
else
count++;
//Serial.println(chartData);
}
Command="";cmd="";str1="";str2="";str3="";str4="";str5="";str6="";str7="";str8="";str9="";
ReceiveState=0,cmdState=1,strState=1,questionstate=0,equalstate=0,semicolonstate=0;
WiFiClient client = server.available();
if (client)
{
String currentLine = "";
while (client.connected())
{
if (client.available())
{
char c = client.read();
getCommand(c);
if (c == '\n')
{
if (currentLine.length() == 0)
{
client.println("HTTP/1.1 200 OK");
client.println("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
client.println("Access-Control-Allow-Methods: GET,POST,PUT,DELETE,OPTIONS");
client.println("Content-Type: text/html; charset=utf-8");
client.println("Access-Control-Allow-Origin: *");
//client.println("Connection: close");
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html><head>");
client.println("<meta charset=\"UTF-8\">");
client.println("<meta http-equiv=\"Access-Control-Allow-Origin\" content=\"*\">");
client.println("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">");
client.println("<script src=\"http://d3js.org/d3.v4.min.js\"></script>");
client.println("</head>");
client.println("<script>");
client.println(" function createChart(input_type,input_data,input_width,input_height,input_title_x,input_title_y,input_yscale_max,input_yscale_min) {");
client.println(" var margin = {top: 50, right: 50, bottom: 70, left: 50};");
client.println(" var width = input_width - margin.left - margin.right;");
client.println(" var height = input_height - margin.top - margin.bottom;");
client.println(" if (document.getElementById('fustyles_chart'))");
client.println(" {");
client.println(" d3.selectAll(\"svg > *\").remove();");
client.println(" var svg = d3.select('#fustyles_chart').attr('width', width + margin.left + margin.right).attr('height', height + margin.top + margin.bottom).append('g').attr('transform', `translate(${margin.left}, ${margin.top})`);");
client.println(" }");
client.println(" else");
client.println(" {");
client.println(" var sheet = document.createElement('style');");
client.println(" sheet.innerHTML = \"body {font-size: 100%;}.area1 {fill: red;}.area2 {fill: blue;}.line1 {fill: none;stroke: red;stroke-width: 2px;}.line2 {fill: none;stroke: blue;stroke-width: 2px;}.point1 {fill:red;stroke:red;}.point2 {fill:blue;stroke:blue;}\";");
client.println(" document.head.appendChild(sheet);");
client.println(" var svg = d3.select('body').append('svg').attr('id','fustyles_chart').attr('width', width + margin.left + margin.right).attr('height', height + margin.top + margin.bottom).append('g').attr('transform', `translate(${margin.left}, ${margin.top})`);");
client.println(" }");
client.println(" var string = \"time,temperature,humidity\\n\"+input_data.replace(/;/ig,\"\\n\");");
client.println(" var data = d3.csvParse(string);");
client.println(" var parseTime = d3.timeParse(\"%H:%M:%S\");");
client.println(" data.forEach(function(d){");
client.println(" d.time = parseTime(d.time);");
client.println(" d.temperature = d.temperature;");
client.println(" d.humidity = d.humidity;");
client.println(" });");
client.println(" var xScale = d3.scaleTime().range([0, width]);");
client.println(" var yScale = d3.scaleLinear().range([height, 0]);");
client.println(" xScale.domain(d3.extent(data, d => d.time));");
client.println(" yScale.domain([input_yscale_min, input_yscale_max]);");
client.println(" if (input_type=='AreaChart')");
client.println(" {");
client.println(" var area2 = d3.area().x(d => xScale(d.time)).y0(height).y1(d => yScale(d.humidity));");
client.println(" svg.append(\"path\").data([data]).attr(\"class\", \"area2\").attr(\"d\", area2);");
client.println(" }");
client.println(" var line2 = d3.line().x(d => xScale(d.time)).y(d => yScale(d.humidity));");
client.println(" svg.append('path').data([data]).attr('class', 'line2').attr('d', line2);");
client.println(" if (input_type=='AreaChart')");
client.println(" {");
client.println(" var area1 = d3.area().x(d => xScale(d.time)).y0(height).y1(d => yScale(d.temperature));");
client.println(" svg.append(\"path\").data([data]).attr(\"class\", \"area1\").attr(\"d\", area1);");
client.println(" }");
client.println(" var line1 = d3.line().x(d => xScale(d.time)).y(d => yScale(d.temperature));");
client.println(" svg.append('path').data([data]).attr('class', 'line1').attr('d', line1);");
client.println(" svg.append(\"g\").attr(\"transform\", \"translate(0,\" + height + \")\").call(d3.axisBottom(xScale).tickFormat(d3.timeFormat(\"%H:%M:%S\"))).selectAll(\"text\").style(\"text-anchor\", \"end\").attr(\"dx\", \"-.8em\").attr(\"dy\", \".15em\").attr(\"transform\", \"rotate(-65)\");");
client.println(" svg.append(\"text\").attr(\"transform\", \"translate(\" + (width+25) + \" ,\" + (height-10) + \")\").style(\"text-anchor\", \"middle\").text(input_title_x);");
client.println(" svg.append(\"g\").call(d3.axisLeft(yScale));");
client.println(" svg.append(\"text\").attr(\"y\", -30 ).attr(\"x\", 80 ).attr(\"dy\", \"1em\").style(\"text-anchor\", \"middle\").text(input_title_y);");
client.println(" data.forEach(function(d){");
client.println(" svg.append('circle').attr(\"cx\",xScale(d.time)).attr(\"cy\",yScale(d.temperature)).attr(\"r\",2).attr(\"title\",'test').attr(\"class\", \"point1\").append(\"svg:title\").text(d.temperature);");
client.println(" svg.append('circle').attr(\"cx\",xScale(d.time)).attr(\"cy\",yScale(d.humidity)).attr(\"r\",2).attr(\"class\", \"point2\").append(\"svg:title\").text(d.humidity);");
client.println(" });");
client.println(" }");
client.println("</script>");
client.println("<body onload=\"createChart('"+chartType+"','"+chartData+"',"+String(chartWidth)+","+String(chartHeight)+",'"+xTitle+"','"+yTitle+"',"+String(yScaleMax)+","+String(yScaleMin)+");setTimeout('location.reload();',"+String(timeInterval)+");\">");
if (Feedback!="")
{
client.println(Feedback);
client.println("<br/><br/>");
}
client.println("</body></html>");
client.println();
Feedback="";
break;
} else {
currentLine = "";
}
}
else if (c != '\r')
{
currentLine += c;
}
if ((currentLine.indexOf("/?")!=-1)&&(currentLine.indexOf(" HTTP")!=-1))
{
if (Command.indexOf("stop")!=-1) {
client.println();
client.println();
client.stop();
}
currentLine="";
Feedback="";
ExecuteCommand();
}
}
}
delay(1);
client.stop();
}
}
void ExecuteCommand()
{
Serial.println("");
//Serial.println("Command: "+Command);
Serial.println("cmd= "+cmd+" ,str1= "+str1+" ,str2= "+str2+" ,str3= "+str3+" ,str4= "+str4+" ,str5= "+str5+" ,str6= "+str6+" ,str7= "+str7+" ,str8= "+str8+" ,str9= "+str9);
Serial.println("");
if (cmd=="chartType")
{
chartType=str1;
}
else if (cmd=="showCount")
{
if (str1.toInt()<showCount)
{
chartData="";
count=0;
}
showCount=str1.toInt();
}
else if (cmd=="timeInterval")
{
timeInterval=str1.toInt();
}
else if (cmd=="chartWidth")
{
chartWidth=str1.toInt();
}
else if (cmd=="chartHeight")
{
chartHeight=str1.toInt();
}
else if (cmd=="yScaleMax")
{
yScaleMax=str1.toInt();
}
else if (cmd=="yScaleMin")
{
yScaleMin=str1.toInt();
}
else if (cmd=="xTitle")
{
xTitle=str1;
}
else if (cmd=="yTitle1")
{
yTitle1=str1;
}
else if (cmd=="yTitle2")
{
yTitle2=str1;
}
else if (cmd=="settings")
{
if (str1!="")
{
if (str1.toInt()<showCount)
{
chartData="";
count=0;
}
showCount=str1.toInt();
}
if (str2!="") timeInterval=str2.toInt();
if (str3!="") chartWidth=str3.toInt();
if (str4!="") chartHeight=str4.toInt();
if (str5!="") xTitle=str5;
if (str6!="") yTitle1=str6;
if (str7!="") yTitle2=str7;
if (str8!="") yScaleMax=str8.toInt();
if (str9!="") yScaleMin=-str9.toInt();
}
else if (cmd=="resetwifi")
{
WiFi.begin(str1.c_str(), str2.c_str());
Serial.print("Connecting to ");
Serial.println(str1);
long int StartTime=millis();
while (WiFi.status() != WL_CONNECTED)
{
delay(500);
if ((StartTime+5000) < millis()) break;
}
Serial.println("");
Serial.println("STAIP: "+WiFi.localIP().toString());
Feedback="STAIP: "+WiFi.localIP().toString();
}
else
{
Feedback="Command is not defined";
}
}
void getCommand(char c)
{
if (c=='?') ReceiveState=1;
if ((c==' ')||(c=='\r')||(c=='\n')) ReceiveState=0;
if (ReceiveState==1)
{
Command=Command+String(c);
if (c=='=') cmdState=0;
if (c==';') strState++;
if ((cmdState==1)&&((c!='?')||(questionstate==1))) cmd=cmd+String(c);
if ((cmdState==0)&&(strState==1)&&((c!='=')||(equalstate==1))) str1=str1+String(c);
if ((cmdState==0)&&(strState==2)&&(c!=';')) str2=str2+String(c);
if ((cmdState==0)&&(strState==3)&&(c!=';')) str3=str3+String(c);
if ((cmdState==0)&&(strState==4)&&(c!=';')) str4=str4+String(c);
if ((cmdState==0)&&(strState==5)&&(c!=';')) str5=str5+String(c);
if ((cmdState==0)&&(strState==6)&&(c!=';')) str6=str6+String(c);
if ((cmdState==0)&&(strState==7)&&(c!=';')) str7=str7+String(c);
if ((cmdState==0)&&(strState==8)&&(c!=';')) str8=str8+String(c);
if ((cmdState==0)&&(strState>=9)&&((c!=';')||(semicolonstate==1))) str9=str9+String(c);
if (c=='?') questionstate=1;
if (c=='=') equalstate=1;
if ((strState>=9)&&(c==';')) semicolonstate=1;
}
}