Hello
First of all this project was copied from:
I wanted to make a simple water meter to control the water consumsion in my vacation home, mostly to alert me of any leaks and such. so i found the project above and this being my first project and all, i thought that it could be a nice entry level project. How wrong was i !?
First it was the error “ISR not in IRAM”
I went and found that the solution was a symple line: ICACHE_RAM_ATTR before the (attachInterrupt)
Im mentioning that because i dont know if, first helps some one and second is this that is ruaning my project.
I probably am doing something wrong in my network config, but i can not get the project to comunicate with the ThingSpeak platform. im just asking some help to figure it out.
If the code is ok can someone help me please, to finish my first project please, inlight me in what im doing wrong.
#include <Arduino.h>
#include <EEPROM.h>
#define USE_SERIAL Serial
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
// Variable init
const int buttonPin = D2; // variable for D2 pin
int contagem = 0; // variable to store the “rise ups” from the flowmeter pulses
int litros = 0;
char thingspeak_string[200]; //string used to send info to the server ThingSpeak
char litros_string[10] = "0";
int addr = 0; //endereço eeprom
//SSID and PASSWORD for the AP (swap the XXXXX for real ssid and password )
const char* ssid = "xxxxxx";
const char* password = "xxxxxx";
//HTTP client init
HTTPClient http;
//Webserver init
WiFiServer server(80);
//Interrupt function, so that the counting of pulse “rise ups” dont interfere with the rest of the code (attachInterrupt)
ICACHE_RAM_ATTR void pin_ISR()
{
contagem++;
}
void setup() {
// Serial Comunication init
Serial.begin(115200);
delay(10);
// EEPROM access init
EEPROM.begin(1);
litros = EEPROM.read(addr);
// Initialization of the variable “buttonPin” as INPUT (D2 pin)
pinMode(buttonPin, INPUT);
// Wifi connection init
Serial.println();
Serial.print("A iniciar ligação...");
Serial.println();
WiFi.begin(ssid, password);
//Waiting for the connection to be established
Serial.print("Waiting for the connection...");
while (WiFi.status() != WL_CONNECTED)
{
delay(2000);
Serial.print(".");
if (WiFi.status() == WL_CONNECTED)
{
Serial.println();
Serial.printf("Connect to the SSID: %s", ssid);
}
}
/***********************/
// Starting Webserver
server.begin();
Serial.println();
Serial.println();
Serial.println("Server started");
// Print the IP address
Serial.print("Use this URL to connect: ");
Serial.print("http://");
Serial.print(WiFi.localIP());
Serial.println("/");
Serial.println();
Serial.print("A iniciar contagem dos litros...");
// Attach an interrupt to the ISR vector
attachInterrupt(digitalPinToInterrupt(buttonPin), pin_ISR, RISING);
Serial.println();
Serial.print("Waiting for client....");
Serial.println();
}
void loop() {
// Verify if a clients is connected to the server
WiFiClient client = server.available();
// Reply from the local http server, and constrution of the page “on the fly”
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: keep-alive");
client.println(""); // do not forget this one
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("<head><meta http-equiv=\"refresh\" content=\"10\" >");
client.println("<script type='text/javascript'>");
client.println("function loadDoc() {");
client.println("var xhttp = new XMLHttpRequest();");
client.println("xhttp.onreadystatechange = function() {");
client.println("if (xhttp.readyState == 4 && xhttp.status == 200) {");
client.printf("document.getElementById('id_litros').innerHTML = %d", litros);
client.println("}");
client.println("};");
client.println("xhttp.open('GET', '', true);");
client.println("xhttp.send();");
client.println("}");
client.println("</script></head>");
client.println("<body onload='setInterval(loadDoc, 5000);'>");
client.println("
");
client.printf("<div id='id_litros'>Estão contados %d litros!</div>", litros);
client.println("<iframe width=\"450\" height=\"260\" style=\"border: 1px solid #cccccc;\" src=\"https://thingspeak.com/channels/120470/charts/1?bgcolor=%23ffffff&color=%23d62020&dynamic=true&results=60&title=Contagem+de+Litros&type=line\"></iframe>");
client.println("</body>");
client.println("</html>");
client.stop();
delay(1);
// If the counting of transitions (Low to High, “rise ups”) it's higher than 440, count one litre more. Then do the rest of the functions (update to EEPROM variable, loca webserver and ThingSpeak)
//pulse per litre +/- 450 "www.hobbytronics.co.uk/yf-s201-water-flow-meter"
if (contagem > 440 )
{
litros++;
Serial.println();
Serial.print("Litros: ");
Serial.print(litros);
//Write the new litres value to the EEPROM and put “contagem” variable to zero
EEPROM.write(addr, litros);
EEPROM.commit();
contagem = 0;
//The value of litres is sent to the ThingSpeak server. It is needed to have an account in ThingSpeak server before using this funcionality. You will have to copy the link given (something like this: https://api.thingspeak.com/update.json?api_key=XXX&field1=XXX), example below.
dtostrf(litros, 4, 2, litros_string);
sprintf(thingspeak_string, "https://api.thingspeak.com/channels/XXXXXXXX/feeds.json?api_key=XXXXXXXXXXXXXXXXXX&results=0", litros_string);
//String sent to ThingSpeak server.
http.begin(thingspeak_string);
//Send HTTP Header
int httpCode = http.GET();
// httpCode_code will be a negative number if there is an error
if (httpCode > 0) {
// file found at server
if (httpCode == HTTP_CODE_OK) {
String payload = http.getString();
Serial.print(" ");
Serial.println(payload);
}
} else {
Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
}
http.end();
}//stop counting
delay(500);
}
