ESP8266 Community Forum

Hi All!
finally had sometime to attack this project.
it consisted on gathering data from a Pot (analog Read on the NodeMcu), passing the data to a webpage, and then displaying the data on the gauge.
It Works!!!
Here are the main parts of the Sketch: Ino


Here is the Index.html:


Look at the attached picture to see what it looks like and it does move the needle every time the pot is moved to a different position!

Hello i very much like this and try this. But i wonder if it is possible you can include the CSS and JS files for the html page please?



Joseph

With that Done, Now I would like to actually get data from a Sensor that uses RS485 instead of Analog read.
Problem: the sensor gives out a response of multiple bytes exp; 01 03 08 00 64 00 3E 00 0D 00 55 9C E8.
so, if I used the following to read and send it to the server as a string of one byte of Data from the analog read:
INO file
void handleADC(){
int a = analogRead(A0);
a = map(a,0,1023,0,100);
String adc = String(a);
Serial.println(adc);
server.send(200, "text/plane",adc); //sends data to server
}
How would be a good practice to send all 01 03 08 00 64 00 3E 00 0D 00 55 9C E8 as a string or array to the server? also keep in mind how would the server assemble this data or save to be used later. par-say each byte is a reading for each gauge. like It was used here:

HTML.file
<script>
setInterval(function() {
GetADC();
}, 1000);

function GetADC() {
var xhttp = new XMLHttpRequest();
var adc=0;
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
adc = Number(this.responseText);
//adc = this.responseText ;
document.getElementById("demo").innerHTML = adc;
gaugePS.value = adc; //send DATA to needle
}
};
xhttp.open("GET", "/getADC", true);
xhttp.send();
}

josephchrzempiec wrote:Hello i very much like this and try this. But i wonder if it is possible you can include the CSS and JS files for the html page please?



Joseph

here is the JS. file :