I seem to have trouble combining these two sketches and can't get the speed detection to work when i finally combine them. Also I seem to be getting an error trying to source the name of the rfid tag. Here's the speed detection code:
#include <Wire.h> //include necessary libraries
#include <LiquidCrystal_I2C.h> //include I2C communication protocol
LiquidCrystal_I2C lcd(0x27, 16, 2); //define address and size of lcd
int sen1=5; //input 1
int sen2=6; //input 2
unsigned long t1=0; //time variable
unsigned long t2=0; //time variable
float velocity; //variable value 'velocity'
void setup()
{
lcd.init();
lcd.backlight(); //initiate lcd
pinMode(sen1,INPUT);
pinMode(sen2,INPUT); //define pins 11 and 12 as inputs
Serial.begin(9600); //initiate serial communication
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" Speed Detector "); //write the msg at start
}
void loop()
{
while(digitalRead(sen1));
while(digitalRead(sen1)==0);
t1=millis();
while(digitalRead(sen2));
t2=millis();
velocity=t2-t1;
velocity=velocity/1000;//convert millisecond to second
velocity=(0.05/velocity);//v=d/t
velocity=velocity*3600;//multiply by seconds per hr
velocity=velocity/1000;//division by meters per Km
int sped = velocity;
if (sped < 150)
{
lcd.setCursor(3,1);
lcd.print(velocity);
lcd.print(" Km/hr ");
delay(500);
lcd.setCursor(3,1);
}
else if (sped > 150)
{
lcd.setCursor(0, 0);
lcd.clear();
lcd.print(" OVERSPEED");
lcd.setCursor(3, 1);
lcd.print(velocity);
lcd.print(" Km/hr ");
delay(500);
lcd.setCursor(3,1);
lcd.print(" ");
delay(500);
lcd.setCursor(3, 1);
lcd.print(velocity);
lcd.print(" Km/hr ");
delay(500);
lcd.setCursor(3,1);
lcd.print(" ");
delay(500);
lcd.setCursor(3, 1);
lcd.print(velocity);
lcd.print(" Km/hr ");
delay(500);
lcd.setCursor(3,1);
lcd.print(" ");
delay(500);
lcd.setCursor(3, 1);
lcd.print(velocity);
lcd.print(" Km/hr ");
delay(500);
lcd.setCursor(3,1);
lcd.print(" ");
delay(500);
lcd.setCursor(3, 1);
lcd.print(velocity);
lcd.print(" Km/hr ");
delay(500);
lcd.setCursor(3,1);
lcd.print(" ");
delay(500);
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" Speed Detector");
delay(500);
}
}
And the RFID part in the reply (just reading part, that's all i want to work right now)
I need it to be so that both work simultaneously. It doesn't have to be much complicated, the Serial monitor can show the rfid details while the screen shows the speed
/*
* Initial Author: ryand1011 (https://github.com/ryand1011)
*
* Reads data written by a program such as "rfid_write_personal_data.ino"
*
* See: https://github.com/miguelbalboa/rfid/tree/master/examples/rfid_write_personal_data
*
* Uses MIFARE RFID card using RFID-RC522 reader
* Uses MFRC522 - Library
* -----------------------------------------------------------------------------------------
* MFRC522 Arduino Arduino Arduino Arduino Arduino
* Reader/PCD Uno/101 Mega Nano v3 Leonardo/Micro Pro Micro
* Signal Pin Pin Pin Pin Pin Pin
* -----------------------------------------------------------------------------------------
* RST/Reset RST 9 5 D9 RESET/ICSP-5 RST
* SPI SS SDA(SS) 10 53 D10 10 10
* SPI MOSI MOSI 11 / ICSP-4 51 D11 ICSP-4 16
* SPI MISO MISO 12 / ICSP-1 50 D12 ICSP-1 14
* SPI SCK SCK 13 / ICSP-3 52 D13 ICSP-3 15
*
* More pin layouts for other boards can be found here: https://github.com/miguelbalboa/rfid#pin-layout
*/
#include <SPI.h>
#include <MFRC522.h>
#define RST_PIN 9 // Configurable, see typical pin layout above
#define SS_PIN 10 // Configurable, see typical pin layout above
MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance
//*****************************************************************************************//
void setup() {
Serial.begin(9600); // Initialize serial communications with the PC
SPI.begin(); // Init SPI bus
mfrc522.PCD_Init(); // Init MFRC522 card
Serial.println(F("Read personal data on a MIFARE PICC:")); //shows in serial that it is ready to read
}
//*****************************************************************************************//
void loop() {
// Prepare key - all keys are set to FFFFFFFFFFFFh at chip delivery from the factory.
MFRC522::MIFARE_Key key;
for (byte i = 0; i < 6; i++) key.keyByte[i] = 0xFF;
//some variables we need
byte block;
byte len;
MFRC522::StatusCode status;
//-------------------------------------------
// Reset the loop if no new card present on the sensor/reader. This saves the entire process when idle.
if ( ! mfrc522.PICC_IsNewCardPresent()) {
return;
}
// Select one of the cards
if ( ! mfrc522.PICC_ReadCardSerial()) {
return;
}
Serial.println(F("**Card Detected:**"));
//-------------------------------------------
mfrc522.PICC_DumpDetailsToSerial(&(mfrc522.uid)); //dump some details about the card
//mfrc522.PICC_DumpToSerial(&(mfrc522.uid)); //uncomment this to see all blocks in hex
//-------------------------------------------
Serial.print(F("Name: "));
byte buffer1[18];
block = 4;
len = 18;
//------------------------------------------- GET FIRST NAME
status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, 4, &key, &(mfrc522.uid)); //line 834 of MFRC522.cpp file
if (status != MFRC522::STATUS_OK) {
Serial.print(F("Authentication failed: "));
Serial.println(mfrc522.GetStatusCodeName(status));
return;
}
status = mfrc522.MIFARE_Read(block, buffer1, &len);
if (status != MFRC522::STATUS_OK) {
Serial.print(F("Reading failed: "));
Serial.println(mfrc522.GetStatusCodeName(status));
return;
}
//PRINT FIRST NAME
for (uint8_t i = 0; i < 16; i++)
{
if (buffer1[i] != 32)
{
Serial.write(buffer1[i]);
}
}
Serial.print(" ");
//---------------------------------------- GET LAST NAME
byte buffer2[18];
block = 1;
status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, 1, &key, &(mfrc522.uid)); //line 834
if (status != MFRC522::STATUS_OK) {
Serial.print(F("Authentication failed: "));
Serial.println(mfrc522.GetStatusCodeName(status));
return;
}
status = mfrc522.MIFARE_Read(block, buffer2, &len);
if (status != MFRC522::STATUS_OK) {
Serial.print(F("Reading failed: "));
Serial.println(mfrc522.GetStatusCodeName(status));
return;
}
//PRINT LAST NAME
for (uint8_t i = 0; i < 16; i++) {
Serial.write(buffer2[i] );
}
//----------------------------------------
Serial.println(F("\n**End Reading**\n"));
delay(1000); //change value if you want to read cards faster
mfrc522.PICC_HaltA();
mfrc522.PCD_StopCrypto1();
}
//*****************************************************************************************//
Maybe your card reader is working, but when you display the data on the LCD, it is erased after every character:
for (uint8_t i = 0; i < 16; i++) {
lcd.clear(); // <--- THIS IS ERASING THE LCD AFTER EVERY CHARACTER
lcd.setCursor(0, 0);
Serial.write(buffer2[i]);
lcd.print(buffer2[i]);
}