Hi guys, I'm working on an RFID tags project using esp32, I have two RFID tags and I wrote two functions: the first to read data from the first RFID tag (Task tag) and the second to read data from the second RFID tag (User tag), I called both functions in the loop function and after booting I realized that the functions I called don't come in order that I wrote: readTask() then readUser() but rather it calls randomly, sometimes it calls readTask first sometimes readUser first sometimes it calls readTask twice in a row, WHAT should I do to fix this!
#include <SPI.h>
#include <MFRC522.h>
#include <ThreeWire.h>
#include <RtcDS1302.h>
#define RST_PIN 22 // Configurable, see typical pin layout above
#define SS_PIN 5 // Configurable, see typical pin layout above
MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance
MFRC522::StatusCode status;
MFRC522::MIFARE_Key key;
byte buffer[34];
byte buffer1[18];
byte buffer2[18];
byte buffer3[18];
byte buffer4[18];
String getTaskTypeID;
//byte len = sizeof(buffer);
byte len = 34;
String getCurrentTask;
ThreeWire myWire(27,26,25); // IO, SCLK, CE
RtcDS1302<ThreeWire> Rtc(myWire);
String currentTime;
//*****************************************************************************************//
void setup() {
Serial.begin(9600); // Initialize serial communications with the PC
SPI.begin(); // Init SPI bus
mfrc522.PCD_Init();
// Init MFRC522 card
Rtc.Begin();
}
void loop() {
readTask();
readUser();
}
void blabla(){
RtcDateTime now = Rtc.GetDateTime();
currentTime=printDateTime(now);
//Serial.println(currentTime);
delay(2000); // ten seconds
if(getTaskTypeID != getCurrentTask){
// Prepare key - all keys are set to FFFFFFFFFFFFh at chip delivery from the factory.
for (byte i = 0; i < 6; i++) key.keyByte[i] = 0xFF;
//-------------------------------------------
// 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;
}
currentTime.getBytes(buffer,34);
writeBlock(4);
mfrc522.PICC_HaltA();
mfrc522.PCD_StopCrypto1();
}
//else
}
void readUser(){
//*****************************************************************************************//
// Prepare key - all keys are set to FFFFFFFFFFFFh at chip delivery from the factory.
for (byte i = 0; i < 6; i++) key.keyByte[i] = 0xFF;
//-------------------------------------------
// 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:**"));
//------------------------------------------- GET TASK ID
Serial.print(F("User ID: "));
readBlock(buffer1,1);
//---------------------------------------- GET TASK TYPE ID
Serial.print(F("\nUser Role ID: "));
readBlock(buffer2,2);
//----------------------------------------
//---------------------------------------- GET TASK DATA: NB TOURS
Serial.print(F("\nUser Current Task: "));
readBlock(buffer3,4);
getCurrentTask = String((char*)buffer3);
//----------------------------------------
//---------------------------------------- GET TASK DATA: NB TOURS
Serial.print(F("\nUser Last Time: "));
readBlock(buffer4,5);
//----------------------------------------
Serial.println(" ");
Serial.println("getCurrentTask:");
Serial.println(getCurrentTask);
Serial.println(F("\n**End Reading**\n"));
delay(1000); //change value if you want to read cards faster
mfrc522.PICC_HaltA();
mfrc522.PCD_StopCrypto1();
}
void readBlock(byte *buffer,byte block){
status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, block, &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, buffer, &len);
if (status != MFRC522::STATUS_OK) {
Serial.print(F("Reading failed: "));
Serial.println(mfrc522.GetStatusCodeName(status));
return;
}
//PRINT ...
for (uint8_t i = 0; i < 16; i++){
Serial.write(buffer[i]);
}
}
void readTask(){
//*****************************************************************************************//
// Prepare key - all keys are set to FFFFFFFFFFFFh at chip delivery from the factory.
for (byte i = 0; i < 6; i++) key.keyByte[i] = 0xFF;
//-------------------------------------------
// 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:**"));
//------------------------------------------- GET TASK ID
Serial.print(F("Task ID: "));
readBlock(buffer1,4);
//getTaskId = String((char*)buffer1);
//Serial.println(getTaskId);
//---------------------------------------- GET TASK TYPE ID
Serial.print(F("\nTask Type ID: "));
readBlock(buffer2,5);
getTaskTypeID = String((char*)buffer2);
//Serial.println(getTaskName);
//----------------------------------------
//---------------------------------------- GET TASK DATA: NB TOURS
Serial.print(F("\nnb de tours: "));
readBlock(buffer3,6);
//getTaskDelai = String((char*)buffer3);
//Serial.println(getTaskDelai);
//----------------------------------------
Serial.println(" ");
Serial.println("getTaskTypeID:");
Serial.println(getTaskTypeID);
Serial.println(F("\n**End Reading**\n"));
delay(1000); //change value if you want to read cards faster
mfrc522.PICC_HaltA();
mfrc522.PCD_StopCrypto1();
}
#define countof(a) (sizeof(a) / sizeof(a[0]))
String printDateTime(const RtcDateTime& dt)
{
char datestring[20];
snprintf_P(datestring,
countof(datestring),
PSTR("%02u:%02u:%02u"),
dt.Hour(),
dt.Minute(),
dt.Second() );
return datestring;
}
void writeBlock(byte block){
/**************************************Block*****************************************************/
//Serial.println(F("Authenticating using key A..."));
status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, block, &key, &(mfrc522.uid));
if (status != MFRC522::STATUS_OK) {
Serial.print(F("PCD_Authenticate() failed: "));
Serial.println(mfrc522.GetStatusCodeName(status));
return;
}
else Serial.println(F("PCD_Authenticate() success: "));
// Write block
status = mfrc522.MIFARE_Write(block, buffer, 16);
if (status != MFRC522::STATUS_OK) {
Serial.print(F("MIFARE_Write() failed: "));
Serial.println(mfrc522.GetStatusCodeName(status));
return;
}
else Serial.println(F("MIFARE_Write() success: "));
}
