Initial commit
This commit is contained in:
416
borrow-system-locker-esp32.ino
Normal file
416
borrow-system-locker-esp32.ino
Normal file
@@ -0,0 +1,416 @@
|
||||
#include <WiFi.h>
|
||||
#include <HTTPClient.h>
|
||||
#include <ArduinoJson.h>
|
||||
#include <Wire.h>
|
||||
#include <LiquidCrystal_I2C.h>
|
||||
#include <SparkFun_Qwiic_Keypad_Arduino_Library.h>
|
||||
#include "config.h" // Include private configuration
|
||||
|
||||
// Hardware configuration
|
||||
const int RELAY_PINS[6] = {13, 12, 14, 27, 26, 25}; // Relay pins for doors 1-6
|
||||
const int DOOR_OPEN_TIME = 5000; // 5 seconds in milliseconds
|
||||
|
||||
// I2C devices
|
||||
LiquidCrystal_I2C lcd(0x27, 16, 2); // LCD with I2C address 0x27
|
||||
KEYPAD keypad; // Qwiic Keypad
|
||||
|
||||
// State variables
|
||||
String currentCode = "";
|
||||
bool processingLoan = false;
|
||||
int failedAttempts = 0;
|
||||
unsigned long lockoutEndTime = 0;
|
||||
const int MAX_FAILED_ATTEMPTS = 3;
|
||||
const unsigned long LOCKOUT_DURATION = 30000; // 30 seconds in milliseconds
|
||||
|
||||
void setup() {
|
||||
Serial.begin(115200);
|
||||
|
||||
// Initialize I2C
|
||||
Wire.begin();
|
||||
|
||||
// Initialize LCD
|
||||
lcd.init();
|
||||
lcd.backlight();
|
||||
lcd.clear();
|
||||
lcd.setCursor(0, 0);
|
||||
lcd.print("Starte...");
|
||||
|
||||
// Initialize keypad
|
||||
if (!keypad.begin()) {
|
||||
Serial.println("Keypad not connected!");
|
||||
lcd.clear();
|
||||
lcd.print("Keypad Fehler!");
|
||||
while (1);
|
||||
}
|
||||
|
||||
// Initialize relay pins (active LOW for most relay modules)
|
||||
for (int i = 0; i < 6; i++) {
|
||||
pinMode(RELAY_PINS[i], OUTPUT);
|
||||
digitalWrite(RELAY_PINS[i], HIGH); // Keep doors locked initially
|
||||
}
|
||||
|
||||
// Connect to WiFi
|
||||
connectToWiFi();
|
||||
|
||||
// Ready message
|
||||
lcd.clear();
|
||||
lcd.setCursor(0, 0);
|
||||
lcd.print("Code eingeben:");
|
||||
lcd.setCursor(0, 1);
|
||||
lcd.print(""); // Code will appear here
|
||||
|
||||
Serial.println("System ready!");
|
||||
}
|
||||
|
||||
void loop() {
|
||||
// Check for lockout timeout
|
||||
if (lockoutEndTime > 0) {
|
||||
if (millis() < lockoutEndTime) {
|
||||
// Still in lockout period
|
||||
unsigned long remainingSeconds = (lockoutEndTime - millis()) / 1000;
|
||||
lcd.setCursor(0, 1);
|
||||
lcd.print("Warte ");
|
||||
lcd.print(remainingSeconds);
|
||||
lcd.print("s ");
|
||||
delay(1000);
|
||||
return;
|
||||
} else {
|
||||
// Lockout period ended
|
||||
lockoutEndTime = 0;
|
||||
failedAttempts = 0;
|
||||
resetState();
|
||||
}
|
||||
}
|
||||
|
||||
// Check if keypad button was pressed
|
||||
keypad.updateFIFO();
|
||||
char button = keypad.getButton();
|
||||
|
||||
if (button != 0 && !processingLoan) {
|
||||
handleKeypadInput(button);
|
||||
}
|
||||
|
||||
// Check WiFi connection
|
||||
if (WiFi.status() != WL_CONNECTED) {
|
||||
connectToWiFi();
|
||||
}
|
||||
}
|
||||
|
||||
void handleKeypadInput(char button) {
|
||||
if (button == '#') {
|
||||
// Submit code
|
||||
if (currentCode.length() == 6) {
|
||||
processLoanCode(currentCode);
|
||||
} else {
|
||||
showError("Code muss 6-stellig sein!");
|
||||
currentCode = "";
|
||||
updateCodeDisplay();
|
||||
}
|
||||
} else if (button == '*') {
|
||||
// Clear current input
|
||||
currentCode = "";
|
||||
updateCodeDisplay();
|
||||
lcd.setCursor(0, 0);
|
||||
lcd.print("Code eingeben: ");
|
||||
} else {
|
||||
// Add digit to code
|
||||
if (currentCode.length() < 6) {
|
||||
currentCode += button;
|
||||
updateCodeDisplay();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void updateCodeDisplay() {
|
||||
lcd.setCursor(0, 1);
|
||||
// Display asterisks for entered digits
|
||||
String display = "";
|
||||
for (int i = 0; i < currentCode.length(); i++) {
|
||||
display += "*";
|
||||
}
|
||||
// Pad with spaces
|
||||
while (display.length() < 16) {
|
||||
display += " ";
|
||||
}
|
||||
lcd.print(display);
|
||||
}
|
||||
|
||||
void processLoanCode(String code) {
|
||||
processingLoan = true;
|
||||
|
||||
lcd.clear();
|
||||
lcd.setCursor(0, 0);
|
||||
lcd.print("Verarbeite...");
|
||||
|
||||
Serial.println("Processing loan code: " + code);
|
||||
|
||||
// Get loan information from backend
|
||||
String lockers = "";
|
||||
bool isReturn = false;
|
||||
|
||||
if (!getLoanInfo(code, lockers, isReturn)) {
|
||||
failedAttempts++;
|
||||
|
||||
if (failedAttempts >= MAX_FAILED_ATTEMPTS) {
|
||||
// Start lockout period
|
||||
lockoutEndTime = millis() + LOCKOUT_DURATION;
|
||||
lcd.clear();
|
||||
lcd.setCursor(0, 0);
|
||||
lcd.print("Zu viele Fehler!");
|
||||
lcd.setCursor(0, 1);
|
||||
lcd.print("Gesperrt 30s");
|
||||
delay(2000);
|
||||
return;
|
||||
} else {
|
||||
showError("Ungültiger Code!");
|
||||
lcd.setCursor(0, 1);
|
||||
lcd.print("Versuch ");
|
||||
lcd.print(failedAttempts);
|
||||
lcd.print("/");
|
||||
lcd.print(MAX_FAILED_ATTEMPTS);
|
||||
delay(2000);
|
||||
}
|
||||
|
||||
resetState();
|
||||
return;
|
||||
}
|
||||
|
||||
// Code was correct - reset failed attempts
|
||||
failedAttempts = 0;
|
||||
|
||||
// Parse locker numbers
|
||||
DynamicJsonDocument doc(512);
|
||||
DeserializationError error = deserializeJson(doc, lockers);
|
||||
|
||||
if (error) {
|
||||
Serial.println("JSON parsing failed!");
|
||||
showError("System Fehler!");
|
||||
resetState();
|
||||
return;
|
||||
}
|
||||
|
||||
// Display action type
|
||||
lcd.clear();
|
||||
lcd.setCursor(0, 0);
|
||||
if (isReturn) {
|
||||
lcd.print("Rückgabe");
|
||||
} else {
|
||||
lcd.print("Ausleihe");
|
||||
}
|
||||
|
||||
// Open doors one by one
|
||||
JsonArray lockerArray = doc.as<JsonArray>();
|
||||
int doorCount = 0;
|
||||
|
||||
for (JsonVariant locker : lockerArray) {
|
||||
int doorNumber = locker.as<int>();
|
||||
if (doorNumber >= 1 && doorNumber <= 6) {
|
||||
doorCount++;
|
||||
openDoor(doorNumber);
|
||||
}
|
||||
}
|
||||
|
||||
if (doorCount == 0) {
|
||||
showError("Keine Fächer!");
|
||||
resetState();
|
||||
return;
|
||||
}
|
||||
|
||||
// Update loan status in backend
|
||||
if (isReturn) {
|
||||
setReturnDate(code);
|
||||
lcd.clear();
|
||||
lcd.setCursor(0, 0);
|
||||
lcd.print("Rückgabe OK!");
|
||||
} else {
|
||||
setTakeDate(code);
|
||||
lcd.clear();
|
||||
lcd.setCursor(0, 0);
|
||||
lcd.print("Ausleihe OK!");
|
||||
}
|
||||
|
||||
lcd.setCursor(0, 1);
|
||||
lcd.print("Vielen Dank!");
|
||||
|
||||
delay(3000);
|
||||
resetState();
|
||||
}
|
||||
|
||||
bool getLoanInfo(String loanCode, String &lockers, bool &isReturn) {
|
||||
if (WiFi.status() != WL_CONNECTED) {
|
||||
Serial.println("WiFi not connected!");
|
||||
return false;
|
||||
}
|
||||
|
||||
HTTPClient http;
|
||||
String url = String(BACKEND_URL) + "/get-loan-by-code/" + API_KEY + "/" + loanCode;
|
||||
|
||||
http.begin(url);
|
||||
int httpCode = http.GET();
|
||||
|
||||
if (httpCode != 200) {
|
||||
Serial.println("HTTP error: " + String(httpCode));
|
||||
http.end();
|
||||
return false;
|
||||
}
|
||||
|
||||
String payload = http.getString();
|
||||
http.end();
|
||||
|
||||
// Parse response
|
||||
DynamicJsonDocument doc(1024);
|
||||
DeserializationError error = deserializeJson(doc, payload);
|
||||
|
||||
if (error) {
|
||||
Serial.println("JSON parsing failed!");
|
||||
return false;
|
||||
}
|
||||
|
||||
// Check if loan was found
|
||||
if (!doc.containsKey("data")) {
|
||||
Serial.println("No data in response");
|
||||
return false;
|
||||
}
|
||||
|
||||
JsonObject data = doc["data"];
|
||||
|
||||
// Get lockers array as string
|
||||
lockers = data["lockers"].as<String>();
|
||||
|
||||
// Check if this is a return (returned_date is null) or pickup (returned_date is set)
|
||||
// If returned_date is null, this is a return action
|
||||
// If take_date is null, this is a pickup action
|
||||
isReturn = !data["returned_date"].isNull();
|
||||
|
||||
// Actually, based on API: if returned_date is null, user is returning items
|
||||
// If take_date is null, user is taking items
|
||||
if (data["take_date"].isNull()) {
|
||||
isReturn = false; // User is taking items
|
||||
} else if (data["returned_date"].isNull()) {
|
||||
isReturn = true; // User is returning items
|
||||
} else {
|
||||
// Both dates set - loan already completed
|
||||
Serial.println("Loan already completed");
|
||||
return false;
|
||||
}
|
||||
|
||||
Serial.println("Loan info retrieved. Lockers: " + lockers + ", isReturn: " + String(isReturn));
|
||||
return true;
|
||||
}
|
||||
|
||||
void openDoor(int doorNumber) {
|
||||
if (doorNumber < 1 || doorNumber > 6) {
|
||||
return;
|
||||
}
|
||||
|
||||
int pinIndex = doorNumber - 1;
|
||||
|
||||
lcd.setCursor(0, 1);
|
||||
lcd.print("Öffne Fach ");
|
||||
lcd.print(doorNumber);
|
||||
lcd.print(" ");
|
||||
|
||||
Serial.println("Opening door " + String(doorNumber));
|
||||
|
||||
// Activate relay (LOW = on for most relay modules)
|
||||
digitalWrite(RELAY_PINS[pinIndex], LOW);
|
||||
|
||||
// Keep door open for specified time
|
||||
delay(DOOR_OPEN_TIME);
|
||||
|
||||
// Deactivate relay (close door)
|
||||
digitalWrite(RELAY_PINS[pinIndex], HIGH);
|
||||
|
||||
Serial.println("Door " + String(doorNumber) + " closed");
|
||||
}
|
||||
|
||||
bool setReturnDate(String loanCode) {
|
||||
if (WiFi.status() != WL_CONNECTED) {
|
||||
return false;
|
||||
}
|
||||
|
||||
HTTPClient http;
|
||||
String url = String(BACKEND_URL) + "/set-return-date/" + API_KEY + "/" + loanCode;
|
||||
|
||||
http.begin(url);
|
||||
int httpCode = http.POST("");
|
||||
|
||||
bool success = (httpCode == 200);
|
||||
http.end();
|
||||
|
||||
Serial.println("Set return date: " + String(success ? "success" : "failed"));
|
||||
return success;
|
||||
}
|
||||
|
||||
bool setTakeDate(String loanCode) {
|
||||
if (WiFi.status() != WL_CONNECTED) {
|
||||
return false;
|
||||
}
|
||||
|
||||
HTTPClient http;
|
||||
String url = String(BACKEND_URL) + "/set-take-date/" + API_KEY + "/" + loanCode;
|
||||
|
||||
http.begin(url);
|
||||
int httpCode = http.POST("");
|
||||
|
||||
bool success = (httpCode == 200);
|
||||
http.end();
|
||||
|
||||
Serial.println("Set take date: " + String(success ? "success" : "failed"));
|
||||
return success;
|
||||
}
|
||||
|
||||
void showError(String message) {
|
||||
lcd.clear();
|
||||
lcd.setCursor(0, 0);
|
||||
lcd.print("FEHLER:");
|
||||
lcd.setCursor(0, 1);
|
||||
lcd.print(message);
|
||||
Serial.println("Error: " + message);
|
||||
delay(2000);
|
||||
}
|
||||
|
||||
void resetState() {
|
||||
currentCode = "";
|
||||
processingLoan = false;
|
||||
lcd.clear();
|
||||
lcd.setCursor(0, 0);
|
||||
lcd.print("Code eingeben:");
|
||||
lcd.setCursor(0, 1);
|
||||
lcd.print("");
|
||||
}
|
||||
|
||||
void connectToWiFi() {
|
||||
lcd.clear();
|
||||
lcd.setCursor(0, 0);
|
||||
lcd.print("Verbinde WiFi...");
|
||||
|
||||
Serial.print("Connecting to WiFi");
|
||||
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
|
||||
|
||||
int attempts = 0;
|
||||
while (WiFi.status() != WL_CONNECTED && attempts < 20) {
|
||||
delay(500);
|
||||
Serial.print(".");
|
||||
lcd.setCursor(0, 1);
|
||||
for (int i = 0; i < (attempts % 16); i++) {
|
||||
lcd.print(".");
|
||||
}
|
||||
attempts++;
|
||||
}
|
||||
|
||||
if (WiFi.status() == WL_CONNECTED) {
|
||||
Serial.println("\nConnected to WiFi!");
|
||||
Serial.println("IP: " + WiFi.localIP().toString());
|
||||
lcd.clear();
|
||||
lcd.setCursor(0, 0);
|
||||
lcd.print("WiFi verbunden!");
|
||||
delay(1500);
|
||||
} else {
|
||||
Serial.println("\nFailed to connect to WiFi!");
|
||||
lcd.clear();
|
||||
lcd.setCursor(0, 0);
|
||||
lcd.print("WiFi Fehler!");
|
||||
delay(2000);
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user