esp1_rfid_motion.ino File Reference

RFID + PIN based access controller with LCD, motion sensing, and MQTT. More...

#include <Arduino.h>
#include <string.h>
#include <ArduinoJson.h>
#include <SPI.h>
#include <MFRC522.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <WiFiMqttClient.h>

Include dependency graph for esp1_rfid_motion.ino:

Go to the source code of this file.

Enumerations
enum class	AccessResult : uint8_t { AccessResult::Denied , AccessResult::Granted , AccessResult::Denied , AccessResult::Granted }
	Access result enumeration. More...

Functions
MFRC522	mfrc522 (RFID_SS_PIN, RFID_RST_PIN)
	MFRC522 RFID reader instance.
LiquidCrystal_I2C	lcd (LCD_ADDRESS, LCD_COLUMNS, LCD_ROWS)
	I2C LCD instance.
void	lcdPrintLine (const __FlashStringHelper *msg, uint8_t line)
	Clears an LCD line and prints a flash-resident string.
void	lcdPrintLine (const char *msg, uint8_t line)
	Clears an LCD line and prints a RAM-resident string.
static void	forceLock ()
	Forces the system back into locked idle state.
void	makeEnteredPins (uint8_t pinLength)
	Builds a masked PIN string for LCD display.
void	callback (char *topic, byte *payload, unsigned int length)
	MQTT message callback handler.
bool	isDisplayActive (uint32_t now)
	Checks whether the LCD backlight should remain active.
void	onMotionDetected (uint32_t now)
	Handles motion-detected events.
void	onMotionIdle (uint32_t now)
	Handles motion-idle state.
void	updateMotionState (uint32_t now)
	Updates motion state based on PIR sensor input.
void	uidToHexString (const MFRC522::Uid &uid, char *output, size_t outputSize)
	Converts an RFID UID to a hexadecimal string.
void	handleRFID ()
	Handles RFID card detection and request publishing.
void	setup ()
	Arduino setup function.
void	loop ()
	Arduino main loop.

Variables
WifiMqttClient	net
	WiFi + MQTT client wrapper.
constexpr char	WIFI_SSID [] = "Mathias2.4"
	WiFi SSID.
constexpr char	WIFI_PASS [] = "mrbombasticcallmefantastic"
	WiFi password.
constexpr char	MQTT_HOST [] = "maqiatto.com"
	MQTT broker hostname.
constexpr uint16_t	MQTT_PORT = 1883
	MQTT broker port.
constexpr char	MQTT_USER [] = "hectorfoss@gmail.com"
	MQTT username.
constexpr char	MQTT_PASS [] = "potter"
	MQTT password.
constexpr char	DEVICE_ID [] = "door1"
	Unique device identifier used in MQTT topics.
constexpr uint8_t	RFID_SS_PIN = 15
	RC522 SPI Slave Select pin (D8 / GPIO15).
constexpr uint8_t	RFID_RST_PIN = 16
	RC522 Reset pin (D0 / GPIO16).
constexpr uint8_t	MOTION_PIN = 0
	Motion sensor pin (D3 / GPIO0).
constexpr uint8_t	I2C_SDA_PIN = 4
	I2C SDA pin for LCD (D2 / GPIO4).
constexpr uint8_t	I2C_SCL_PIN = 5
	I2C SCL pin for LCD (D1 / GPIO5).
constexpr uint8_t	LCD_COLUMNS = 16
	Number of LCD columns.
constexpr uint8_t	LCD_ROWS = 2
	Number of LCD rows.
constexpr uint8_t	LCD_ADDRESS = 0x27
	I2C address of the LCD module.
constexpr uint32_t	DISPLAY_MS = 3000
	Duration (ms) to display text before resetting.
constexpr uint32_t	DISPLAY_BACKLIGHT_MS = 5000
	Duration (ms) to keep LCD backlight on after motion.
constexpr uint32_t	PIN_TIME_MS = 15000
	Time window (ms) for entering PIN after RFID success.
constexpr uint32_t	UNLOCK_TIME_MS = 5000
	Door unlock display duration (ms).
constexpr uint32_t	POLL_MS = 30
	Main loop polling delay (ms).
AccessResult	rfidAccess
	Result of RFID authentication.
AccessResult	accessGranted
	Result of PIN verification.
bool	textshown = false
	Indicates whether a status message is currently displayed.
uint32_t	showTextUntil = 0
	Timestamp (ms) when the displayed text should expire.
uint32_t	showDisplayUntil = 0
	Timestamp (ms) when LCD backlight should turn off.
bool	motionActive = false
	Indicates whether motion is currently considered active.
static char	enteredPins [5] = " "
	Masked PIN buffer shown on LCD (max 4 digits + null terminator).

Detailed Description

RFID + PIN based access controller with LCD, motion sensing, and MQTT.

Definition in file esp1_rfid_motion.ino.