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A simple bubble counter for a Wemos D1 mini lite
/*
Bubble Counter for fermentation processes
Made by: Joost Plattel
Email: jsplattel@gmail.com
This little arduino project is used for tracking fermentation processes
it works with a little photo interupter and posts the bubble count every
10 minutes to a endpoint specified.
*/
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
bool DEBUG = true;
int sensorPin = 0; // select the input pin for the photo interrupter
int sensorValue = 0; // variable to store the value coming from the sensor
int ledPin = 5; // D1 on the WEMOS
int bubbleCount = 0; // Count for bubbles (resets after sending)
int timer = 0; //
int timerTrigger = 12000; // 50ms * 10 * 60 * 10 = 12000 = every 10 minutes
const char* ssid = "wifissid";
const char* password = "password";
const char* endpoint = "http://yourendpoint.beer;
HTTPClient http;
void setup() {
pinMode(ledPin, OUTPUT);
Serial.begin(9600); // set up Serial library at 9600 bps
// Connect to WiFi network
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
// Connect to wifi
WiFi.begin(ssid, password);
// Blink the green LED when it is connecting
while (WiFi.status() != WL_CONNECTED) {
digitalWrite(ledPin, HIGH);
delay(500);
Serial.print(".");
digitalWrite(ledPin, LOW);
delay(500);
}
Serial.println("Connected!");
}
void loop() {
// read the value from the sensor
sensorValue = analogRead(sensorPin);
// print the sensor value to the serial monito
// if (DEBUG) { Serial.println(sensorValue); }
if (sensorValue < 100) {
// Blink the green LED.
digitalWrite(ledPin, HIGH);
bubbleCount++; // Increment bubble count
if (DEBUG) { Serial.println("Bubble!"); }
}
// Increment the timer
delay(50);
timer++;
if (timer > timerTrigger) {
digitalWrite(ledPin, HIGH);
// Make a request to the endpoint with the bubble count
http.begin(endpoint);
http.addHeader("Content-Type", "application/json");
int httpCode = http.POST("{'bubbles': " + String(bubbleCount) + "}");
// Print status-code and close the connection
Serial.println(httpCode); // Print HTTP return code
http.end(); //Close connection
// Reset timer
timer = 0;
}
// Turn of the green LED
digitalWrite(ledPin, LOW);
}
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