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washing-machine-monitor.ino
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washing-machine-monitor.ino
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#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include <gfxfont.h>
#include <ESP8266WiFi.h>
#include "Configuration.h"
WiFiClient client;
Adafruit_SSD1306 display = Adafruit_SSD1306();
// Variables we need to define
char server[] = "api.thingspeak.com"; //thingspeak server
bool washing = false; // Is the washing machine on?
bool alert = false; // Is alert mode one
// The min / max times for checking for vibration events
unsigned long vibrateOffMinTime = 1000 * 60 * 12;
unsigned long vibrateOffMaxTime = 1000 * 60 * 13;
unsigned long vibrateOnMinTime = 1000 * 8;
unsigned long vibrateOnMaxTime = 1000 * 30;
unsigned long alertInterval = 1000 * 60 * 10; // How long to wait between alerts
int vibrationCountMin = 30;
// Hold whether or not we should start checking for vibrations on start / stop
bool checkingIfStart = false;
bool checkingIfStop = false;
// Our main time interval holder
unsigned long startMillis = 0; // Last time we got a "vibrating" reading
unsigned long lastAlertTime = 0; // Last time we send an alert
// Count on / off vibrations
int vibrationOne = 0;
void setup() {
// Init the WIFI connection
initWifi();
// Startup the OLED
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
display.display();
delay(1000);
display.clearDisplay();
display.display();
displayText("Ready...");
delay(1000);
// Init the button
pinMode(BUTTON_PIN, INPUT_PULLUP);
}
void loop() {
// If we're not washing, check to see if we should be
if (!washing) {
checkStartingWashing();
}
else {
// Otherwise, check to see if we're done washing
checkDoneWashing();
}
// If we're not washing and it's in alert mode, run the alert process
if (alert && !washing) {
runAlert();
}
// Check the button press to clear the alert mode
int buttonState = digitalRead(BUTTON_PIN);
if (buttonState) {
alert = false;
vibrationOne = 0;
display.clearDisplay();
display.display();
displayText("Ready...");
}
delay(50);
}
/**
* Initialize the wifi connection
*/
void initWifi() {
Serial.begin(115200);
delay(100);
// We start by connecting to a WiFi network
Serial.println();
Serial.println();
displayText("Connecting to ");
Serial.print("Connecting to ");
Serial.println(WIFI_NETWORK);
// The actual connection
WiFi.begin(WIFI_NETWORK, WIFI_PASSWORD);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
/**
* Check to see if we need to "start" washing
*/
void checkStartingWashing() {
if (!checkingIfStart) {
checkingIfStart = true;
vibrationOne = 0;
startMillis = millis();
}
// Check the current state, increment the number of times it's hit it
if (isVibrating()) {
vibrationOne++;
}
if ( hasVibrationStarted() && millis() - startMillis > vibrateOnMinTime) {
washing = true;
checkingIfStart = false;
display.clearDisplay();
display.display();
displayText("Washing...");
}
if (millis() - startMillis > vibrateOnMaxTime) {
checkingIfStart = false;
}
}
/**
* Check to see if we're done washing
*/
void checkDoneWashing() {
if (!checkingIfStop) {
checkingIfStop = true;
vibrationOne = 0;
startMillis = millis();
}
// Check the current state, increment the number of times it's hit it
if (isVibrating()) {
vibrationOne++;
}
if ( hasVibrationStopped() && millis() - startMillis > vibrateOffMinTime) {
washing = false;
alert = true;
checkingIfStop = false;
display.clearDisplay();
display.display();
}
if (millis() - startMillis > vibrateOffMaxTime) {
checkingIfStop = false;
}
}
/**
* Check to see if vibrations have started
*/
bool hasVibrationStarted() {
if (vibrationOne > vibrationCountMin) {
return true;
}
return false;
}
/**
* Check to see if vibrations have stopped
*/
bool hasVibrationStopped() {
if (vibrationOne < vibrationCountMin) {
return true;
}
return false;
}
/**
* Run the alert process
*/
void runAlert() {
// Make sure we only send alerts periodically
if (lastAlertTime == 0 || millis() - lastAlertTime > alertInterval) {
displayText("Sending alert");
// Connect to twilio and send the alert
sendSMS(SEND_NUMBER, URLEncode("Washing mashing done!"));
// Set the last time the alert was sent and take it out of alert mode
lastAlertTime = millis();
// Update the display
display.clearDisplay();
display.display();
displayText("Done");
}
}
/**
* Send an alert to twilio
*/
void sendSMS(String number,String message)
{
// Make a TCP connection to remote host
if (client.connect(server, 80))
{
//api.thingspeak.com/apps/thinghttp/send_request?api_key={api key}&number={send to number}&message={text body}
client.print("GET /apps/thinghttp/send_request?api_key=");
client.print(API_KEY);
client.print("&number=");
client.print(number);
client.print("&message=");
client.print(message);
client.println(" HTTP/1.1");
client.print("Host: ");
client.println(server);
client.println("Connection: close");
client.println();
}
else
{
Serial.println(F("Connection failed"));
}
// Check for a response from the server, and route it
// out the serial port.
while (client.connected())
{
if ( client.available() )
{
char c = client.read();
Serial.print(c);
}
}
Serial.println();
client.stop();
}
/**
* Read from the vibration sensor
*/
bool isVibrating() {
//return (digitalRead(VIBRATION_PIN)) ? true : false;
int soundLevel = analogRead(A0);
return (soundLevel > SOUNDLEVEL_THRESHOLD) ? true : false;
}
/**
* Display text on the OLED
*/
void displayText(String text) {
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(10,10);
display.println( " " + text);
display.setCursor(10,10);
display.display();
}
/**
* Encode any message to send via SMS
*/
String URLEncode(const char* msg)
{
const char *hex = "0123456789abcdef";
String encodedMsg = "";
while (*msg!='\0'){
if( ('a' <= *msg && *msg <= 'z')
|| ('A' <= *msg && *msg <= 'Z')
|| ('0' <= *msg && *msg <= '9') ) {
encodedMsg += *msg;
}
else {
encodedMsg += '%';
encodedMsg += hex[*msg >> 4];
encodedMsg += hex[*msg & 15];
}
msg++;
}
return encodedMsg;
}