LILiK
/
PyCoffee_ESP8266

// LAST UPDATE: NOVEMBER 2024

#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESPAsyncTCP.h>
#include <ESPAsyncWebServer.h>
#include <AsyncElegantOTA.h>
#include <Wire.h>
#include <LiquidCrystal.h>
#include <EEPROM.h> // to store number of coffees made and pumped water

AsyncWebServer server(80);
// coffee times (in seconds) and temperature (in C) settings:
// Warning! these are currently hard-coded in the arduino nano
//int rist = 10;
//int espr = 15;
//int lung = 20;
//int amer = 60;
//int desiredTemp = 70;

// support variables used by checktraywater() to interact with EEPROM
int mem0 = 0;int mem1 = 0;
// This next variable is used to get current "time" in ms and break out of while cycles that need a time limit safeguard
unsigned long startTime;
// WiFi settings
const char* ssid = "LILiK_WiFi";   //replace with your SSID
const char* password = "pippopippo"; //password
String hostname = "PyCoffee";int wifiStatus = 0; // variable to store status (connected/disconnected, used by LCDprint)

// string to store coffee style from HTML
String input_field = ""; // string for coffee type
String input_field2 = ""; // string for serial commands

// HTML WEB interface
const char index_html[] PROGMEM = R"rawliteral(<!DOCTYPE HTML><html><head>  <title>PyCoffee HTML interface</title>  <meta name="viewport" content="width=device-width, initial-scale=1">
  <style>    html {display: inline-block; text-align: center;}  </style>  </head><body>  <a>Ciao! Sono la macchina del caffe' della 117bis!</a><br>  <a>Seleziona il tipo di caffe' e conferma</a><br><br>    <form action="/get">    <select name="coffee_input">      <option value="Ristretto">Ristretto</option>      <option value="Espresso">Espresso</option>      <option value="Lungo">Lungo</option>      <option value="Americano">Americano</option>    </select><br><br>    <input type="submit" value="Conferma">  </form>  <br><br>
  <a>Puoi mandare comandi a Arduino via seriale</a><br>  <a>usa 'exit' per uscire dall'ultimo comando seriale</a><br><br>
  <form action="/serial">    <select name="serial_input">      <option value="exit">Exit Command</option>      <option value="dryr">PerformDryRun</option>      <option value="noco">NoCoffeeRun</option>      <option value="clea">Self-Clean</option>      <option value="make">Make Coffee</option>      <option value="pump">pumpWater</option>      <option value="pres">Press</option>      <option value="unpr">un-Press</option>      <option value="f-pr">Force-Press</option>      <option value="f-un">Force-unpress</option>      <option value="heat">Heat Boiler</option>      <option value="grin">GrindPowder</option>      <option value="drop">Drop Powder</option>      <option value="rist">setRistretto-15s</option>      <option value="espr">setEspresso-20s</option>      <option value="long">setLungo-25s</option>      <option value="amer">setAmericano-60s</option>    </select><br><br>    <input type="submit" value="Invia Comando">    </form>  <br><br>    <a>Consulta la pagina Gitea per maggiori informazioni</a><br><br>
  <a>Aggiornamento firmware:</a> <br>  <a href='/update'>&#11014;&#65039; OTA Firmware_Update &#11014;&#65039;</a><br><br>  <a>Codice sorgente (su LILiK projects):</a> <br>  <a href='https://projects.lilik.it/LILiK/PyCoffee_ESP8266'>&#9749;Gitea&#9749;</a><br><br>

</body></html>)rawliteral";
// input parameter for html server
const char* input_paramter1 = "coffee_input";const char* input_paramter2 = "serial_input";
// enable http coffee making on server request
int httpCoffee = 0;int serialCommand = 0;
// button pins
const int sel = 0, enter = 2;
// Global string, allows serial in
String readString;
// coffee type variable
String type = "Espresso";
// number of coffees made and seconds of pumped water since last tray empty/water refill
// used by checkTrayWater() function
int coffeesDone = 0;int pumpedS = 0;const int MaxCoffees = 10;const int MaxPumped = 500;
// Support string to store stuff to be sent over serial
String serialOUTbuffer = "none";
// Variables to store lines to be printed on LCD:
String line1 = "";String line2 = "";// only refresh LCD when needed
int printed = 0;
// LCD pins <--> ESP8266 LOLIN D1 pins
const int e_RS = 4, e_EN = 5, e_D6 = 12, e_D7 = 13, e_D5 = 14, e_D8 = 15;LiquidCrystal lcd(e_RS, e_EN, e_D6, e_D7, e_D5, e_D8);
// Custom character matrix (coffee cup left side)
byte cupL[8] = {0b00001,0b00010,0b00010,0b00001,0b00001,0b00000,0b00111,0b00100};// Custom character matrix (coffee cup center)
byte cupC[8] = {0b00100,0b00101,0b01001,0b01000,0b00100,0b00000,0b11111,0b00000};// Custom character matrix (coffee cup right side)
byte cupR[8] = {0b10000,0b00000,0b00000,0b10000,0b10000,0b00000,0b11000,0b01110};// Custom character matrix (coffee cup left side line 2)
byte cupL1[8] = {0b00100,0b00100,0b00100,0b00010,0b01111,0b01000,0b00111,0b00000};// Custom character matrix (coffee cup center line 2)
byte cupC1[8] = {0b00000,0b00000,0b00000,0b00000,0b11111,0b00000,0b11111,0b00000};// Custom character matrix (coffee cup right side line 2)
byte cupR1[8] = {0b01010,0b01010,0b01110,0b10000,0b11100,0b00100,0b11000,0b00000};// Custom character matrix (WiFi connected/disconnected)
byte wifiok[8] = {0b00000,0b01110,0b10001,0b00100,0b01010,0b00000,0b00000,0b00100};byte wifino[8] = {0b00000,0b10001,0b01010,0b00100,0b01010,0b10001,0b00000,0b00100};
void notFound(AsyncWebServerRequest *request) {  request->send(404, "text/plain", "Not found");}
//_____________________________________________________________________________

// the setup function runs once when you press reset or power the board
void setup(void) {
  // check how many coffees were done and seconds of pumped water from EEPROM
  mem0 = (EEPROM.read(0));  mem1 = (EEPROM.read(1));
  // protect against under/over-flow due to errors or memory location never having been used
  if (mem0 < 0 or mem0 > MaxCoffees + 1) {    EEPROM.write(0, 0);    mem0 = 0;  }  if (mem1 < 0 or mem1 > MaxPumped + 50) {    EEPROM.write(1, 0);    mem1 = 0;  }  coffeesDone = mem0;  pumpedS = mem1;
  // Set buttons as inputs with internal pull-ups
  pinMode(enter, INPUT_PULLUP);  pinMode(sel, INPUT_PULLUP);    // initialize serial:
  Serial.begin(9600);
  // Make custom characters available to LCD to paint a cute coffee cup
  lcd.createChar(0, cupL);  lcd.createChar(1, cupC);  lcd.createChar(2, cupR);  lcd.createChar(3, cupL1);  lcd.createChar(4, cupC1);  lcd.createChar(5, cupR1);  lcd.createChar(6, wifiok);  lcd.createChar(7, wifino);  lcd.begin(16, 2); // set up number of columns and rows
  lcd.clear();      // Clear LCD

  // Show boot animation on LCD
  bootAnimation();    WiFi.mode(WIFI_STA);  //  WiFi.config(INADDR_NONE, INADDR_NONE, INADDR_NONE, INADDR_NONE);
  WiFi.setHostname(hostname.c_str()); //define hostname
  WiFi.begin(ssid, password);
  connectedTo();
  // Send web page with input fields to client
  server.on("/", HTTP_GET, [](AsyncWebServerRequest * request) {    request->send(200, "text/html", index_html);  });
  // Get data from menu
  // coffee
  server.on("/get", HTTP_GET, [] (AsyncWebServerRequest *request) {    if (request->hasParam(input_paramter1)) {      type = request->getParam(input_paramter1)->value();      httpCoffee = 1;    }  request->send_P(200, "text/html", index_html); // Re-send main page, with data!
  });  // serial commands
  server.on("/serial", HTTP_GET, [] (AsyncWebServerRequest *request) {    if (request->hasParam(input_paramter2)) {      if (serialOUTbuffer != "") {        serialOUTbuffer = request->getParam(input_paramter2)->value();        serialCommand = 1;        httpCoffee = 0;      }    }  request->send_P(200, "text/html", index_html); // Re-send main page, with data!
  });    // in case of error:
  server.onNotFound(notFound);  AsyncElegantOTA.begin(&server);    // Start ElegantOTA
  server.begin();  Serial.println("HTTP server started");
  // Print selection screen
  printed = 1;    // tell the Arduino we're ready
  serialOUTbuffer = "read";  delay(100);  writeSerial();    type = "Espresso";  line1 = "Selection";  line2 = type;  LCDprint();  delay(500);}
//_____________________________________________________________________________

void loop() {// the loop function runs over and over again forever
delay(10);serialFromHTTP();
    // select type of brew by pressing the sel button
    if (digitalRead(sel) == LOW && type == "Espresso") {      type = "Lungo";      line1 = "Selection";      line2 = type;      LCDprint();      delay(500);    }    else if (digitalRead(sel) == LOW && type == "Lungo") {      type = "Americano";      line1 = "Selection";      line2 = type;      LCDprint();      delay(500);    }    else if (digitalRead(sel) == LOW && type == "Americano") {      type = "Ristretto";      line1 = "Selection";      line2 = type;      LCDprint();      delay(500);    }    else if (digitalRead(sel) == LOW && type == "Ristretto") {      type = "Espresso";      line1 = "Selection";      line2 = type;      LCDprint();      delay(500);    }    else if (Serial.available() > 0) {      // read the incoming data: (we only care about the first few characters, I've chosen 4)
      readString = "";      serialRead();      String incomingData = readString.substring(0,4);      // are we heating the boiler to vapor temperature?
      if (incomingData == "Vapo") {        line1 = "Heating";        line2 = "Vapor";        LCDprint();        delay(1000);      }      if (incomingData == "reac") {        line1 = "Vapor";        line2 = "ok";        LCDprint();        delay(1000);        printed = 1;        delay(10000);        serialOUTbuffer = "unpr";        writeSerial();        delay(100);      }    }  refreshMenu();  delay(100);
  // check if data has been sent on serial from Arduino,
  // send commands to arduino and display corresponding messages on LCD
  // this is the main function dedicated to making coffee and reporting errors.
  serialCoffeeCommandLCDInterface();}

//_____________________________________________________________________________

// this is how we read the input
void serialRead() {   while (Serial.available()) {  delay(1);    if (Serial.available() > 0) {    char c = Serial.read();    readString += c;}  }}
//_____________________________________________________________________________

void bootAnimation() {    delay(1000);  line1 = "ESP_Coffee";  line2 = "Release 1.1e";  LCDprint();  delay(1000);  line1 = "JIMBO";  line2 = "";  LCDprint();  delay(1000);  lcd.setCursor(11,0);  //print coffee cup top using uint8 method
  lcd.write((uint8_t)0);  delay(10);  lcd.write((uint8_t)1);  delay(10);  lcd.write((uint8_t)2);  delay(10);  lcd.setCursor(11,1);  //print coffee cup bottom using uint8 method
  lcd.write((uint8_t)3);  delay(10);  lcd.write((uint8_t)4);  delay(10);  lcd.write((uint8_t)5);  delay(2000);}
//_____________________________________________________________________________

void connectedTo() {    startTime = millis();  while (WiFi.status() != WL_CONNECTED) {    delay(500);    Serial.print(".");    if (millis() - startTime > 60000) {      Serial.println("WiFi connection timeout");      line1 = "Timeout at SSID";      line2 = ssid;      LCDprint();      delay(10000);      break;    }    else {      wifiStatus = 1;    }  }    Serial.println("");  Serial.println("WiFi connected");  Serial.println("IP address: ");  Serial.println(WiFi.localIP());   //You can get IP address assigned to ESP

  line1 = "SSID";  line2 = ssid;  LCDprint();  delay(2000);
  line1 = "Connected to IP:";  line2 = "";  LCDprint();  delay(10);  lcd.setCursor(0, 1);          // move cursor to   (0, 1)
  lcd.print(WiFi.localIP());    // re-print line2 or IP won't print
  delay(2000);}
//_____________________________________________________________________________

void refreshMenu() {  if (line1 == "Selection" && printed == 1) {    lcd.clear();    lcd.setCursor(0, 0);          // move cursor to   (0, 0)
    lcd.print(line1);             // print line1
    delay(10);    lcd.setCursor(15, 0);         // move cursor to   (14, 0)
    // print wifi logo depending on connection starus
    if (wifiStatus == 1) {      lcd.write((uint8_t)6);      delay(10);    }    else if (wifiStatus == 0) {      lcd.write((uint8_t)7);      delay(10);    }        lcd.setCursor(0, 1);          // move cursor to   (0, 1)
    lcd.print(line2);             // print line2
    delay(10);    printed = 0;  }}
//_____________________________________________________________________________

void LCDprint() {  lcd.clear();  lcd.setCursor(0, 0);          // move cursor to   (0, 0)
  lcd.print(line1);             // print line1
  delay(10);  lcd.setCursor(15, 0);         // move cursor to   (14, 0)
  // print wifi logo depending on connection starus
  if (wifiStatus == 1) {    lcd.write((uint8_t)6);    delay(10);  }  else if (wifiStatus == 0) {    lcd.write((uint8_t)7);    delay(10);  }    lcd.setCursor(0, 1);          // move cursor to   (0, 1)
  lcd.print(line2);             // print line2
  delay(10);}
//_____________________________________________________________________________

void writeSerial() {  Serial.println(serialOUTbuffer);}
//_____________________________________________________________________________

void serialFromHTTP() {    if (serialCommand == 1){    serialCommand = 0;    line1 = "serialCom";    line2 = serialOUTbuffer;    LCDprint();    delay(1000);    writeSerial();    while (serialOUTbuffer != "exit" && digitalRead(sel) == HIGH ) {            if (Serial.available() > 0) {      // read the incoming data: (we only care about the first few characters, I've chosen 4)
      readString = "";      serialRead();      String incomingData = readString.substring(0,16);      Serial.print("serial put from Arduino:\n");      Serial.print(incomingData);      Serial.print("\n");      if (serialOUTbuffer != "none") {        line1 = serialOUTbuffer;      }      line2 = incomingData;      LCDprint();      delay(100);      serialOUTbuffer = "none";      writeSerial();      }    }    line1 = "Selection";    line2 = type;    LCDprint();    delay(500);  }}
//_____________________________________________________________________________

void checkTrayWater() {  // section dedicated to empty tray and refill water messages
  if (coffeesDone == MaxCoffees) {    lcd.clear();    while (digitalRead(enter) == HIGH) {      line1 = "Empty Tray";      line2 = "Then hold Make";      delay(500);      LCDprint();    }    coffeesDone = 0;    EEPROM.write(0, 0);    line1 = "Tray emptied";    line2 = "continuing...";    delay(1000);    LCDprint();  }    if (pumpedS > MaxPumped) {    lcd.clear();    while (digitalRead(enter) == HIGH) {      line1 = "Refill Water";      line1 = "Then hold Make";      delay(500);      LCDprint();    }    pumpedS = 0;    EEPROM.write(1, 0);    line1 = "Water Refilled";    line2 = "continuing...";    delay(1000);    LCDprint();  }  delay(500);  printed = 1;  EEPROM.commit();  line1 = "Selection";  line2 = type;}
//_____________________________________________________________________________

void serialCoffeeCommandLCDInterface() {  if (digitalRead(enter) == LOW or httpCoffee == 1) {    httpCoffee = 0;    if (type == "Espresso") {      serialOUTbuffer = "espr";      pumpedS = pumpedS + 20;     }     else if (type == "Lungo") {      serialOUTbuffer = "long";      pumpedS = pumpedS + 25;     }     else if (type == "Ristretto") {      serialOUTbuffer = "rist";      pumpedS = pumpedS + 15;     }     else if (type == "Americano") {     serialOUTbuffer = "amer";     pumpedS = pumpedS + 60;     }     writeSerial();     delay(500);     serialOUTbuffer = "make";     writeSerial();    }    if (Serial.available() > 0) {  // read the incoming data: (we only care about the first few characters, I've chosen 4)
      readString = "";      serialRead();      String incomingData = readString.substring(0,4);      Serial.print(incomingData);      Serial.print("\n");
    if (incomingData == "Maki") {      // Display making coffee message
      line1 = "Making";      line2 = type;      LCDprint();
      delay(10);            lcd.setCursor(11,0);  //print coffee cup top using uint8 method
      lcd.write((uint8_t)0);      delay(10);      lcd.write((uint8_t)1);      delay(10);      lcd.write((uint8_t)2);      delay(10);      lcd.setCursor(11,1);  //print coffee cup bottom using uint8 method
      lcd.write((uint8_t)3);      delay(10);      lcd.write((uint8_t)4);      delay(10);      lcd.write((uint8_t)5);      delay(10);
    }
    if (incomingData == "u-Th") {      Serial.print("Thermocouple: unplugged or failed\n");      while (true) {        // Unrecoverable error has occurred during heating, lock the machine
        line1 = "ThermoCouple err";        line2 = "Unplugged/failed";        LCDprint();        delay(10000);      }    }    if (incomingData == "p-Th") {      Serial.print("Thermocouple: positioning or relay fault\n");      while (true) {        // Unrecoverable error has occurred during heating, lock the machine
        line1 = "ThermoCouple err";        line2 = "Fallen/relayFail";        LCDprint();        delay(10000);      }    }    if (incomingData == "Erro") {      Serial.print("Unrecoverable error in Arduino subsystem. Please restart\n");      while (true) {        // Unrecoverable error has occurred during heating, lock the machine
        line1 = "Enrecoverable";        line2 = "Error. Restart.";        LCDprint();        delay(10000);      }    }    if (incomingData == "h-ta") {      Serial.print("took too long to warm boiler, this is just a warning. Everything should be fine\n");      line1 = "Heating too long";      line2 = "Continuing...";      LCDprint();    }    if (incomingData == "p-en") {      Serial.print("Unable to Press. Please restart\n");      while (true) {        // Unrecoverable error has occurred while pressing, lock the machine
        line1 = "Press failed";        line2 = "Error. Restart.";        LCDprint();        delay(10000);      }    }    if (incomingData == "u-en") {      Serial.print("Unable to unPress. Please restart\n");      while (true) {        // Unrecoverable error has occurred while unpressing, lock the machine
        line1 = "unPress failed";        line2 = "Error. Restart.";        LCDprint();        delay(10000);      }    }    if (incomingData == "refi") {      Serial.print("refill coffee and send cont command\n");      line1 = "Refill Coffee";      line2 = "then tap make";      LCDprint();      while (true) {        delay(10);        if (digitalRead(enter) == LOW) {          line1 = "Refilled";          line2 = "continuing";          LCDprint();          serialOUTbuffer = "cont";          writeSerial();          break;        }      }    }    if (incomingData == "g-fa") {      Serial.print("g-failure: second grinding failure, check grinder!\n");      while (true) {        // Unrecoverable error has occurred during grinding, lock the machine
        line1 = "Grinding failed";        line2 = "Check Machine";        LCDprint();        delay(10000);      }    }    if (incomingData == "Comp") {      coffeesDone++;      Serial.print("Made coffee\n");      line1 = "Coffee Done :)";      line2 = "Enjoy!";      LCDprint();      delay(5000);      line1 = "Selection";      delay(500);    }  }}