Issue while interfacing NRF24L01 and RFID on same arduino
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I had the same problem when I tried it: if you connect the rfid reader you loose the nrf24 communication. It is like they don't like sharing the SPI :D
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thanks to all of you for the reply.
I found the solution.
after looking at the code and some debugging.
my code is working fine now.
This is the code/** * -------------------------------------------------------------------------------------------------------------------- * Example sketch/program showing how to read data from more than one PICC to serial. * -------------------------------------------------------------------------------------------------------------------- * This is a MFRC522 library example; for further details and other examples see: https://github.com/miguelbalboa/rfid * * Example sketch/program showing how to read data from more than one PICC (that is: a RFID Tag or Card) using a * MFRC522 based RFID Reader on the Arduino SPI interface. * * Warning: This may not work! Multiple devices at one SPI are difficult and cause many trouble!! Engineering skill * and knowledge are required! * * @license Released into the public domain. * * Typical pin layout used: * ----------------------------------------------------------------------------------------- * 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 1 SDA(SS) ** custom, take a unused pin, only HIGH/LOW required ** * SPI SS 2 SDA(SS) ** custom, take a unused pin, only HIGH/LOW required ** * 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 * */ #include <SPI.h> #include <MFRC522.h> #include <nRF24L01.h> #include <RF24.h> RF24 radio(7, 8); // CE, CSN const byte add[6] = "00001"; #define RST_PIN 9 // Configurable, see typical pin layout above #define SS_PIN 10 // Configurable, take a unused pin, only HIGH/LOW required, must be diffrent to SS 2 //#define SS_2_PIN 8 // Configurable, take a unused pin, only HIGH/LOW required, must be diffrent to SS 1 #define NR_OF_READERS 1 byte ssPins[] = {SS_PIN}; MFRC522 mfrc522[NR_OF_READERS]; // Create MFRC522 instance. /** * Initialize. */ void setup() { Serial.begin(9600); // Initialize serial communications with the PC while (!Serial); // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4) SPI.begin(); // Init SPI bus for (uint8_t reader = 0; reader < NR_OF_READERS; reader++) { mfrc522[reader].PCD_Init(ssPins[reader], RST_PIN); // Init each MFRC522 card Serial.print(F("Reader ")); Serial.print(reader); Serial.print(F(": ")); mfrc522[reader].PCD_DumpVersionToSerial(); } radio.begin(); radio.openWritingPipe(add); radio.setPALevel(RF24_PA_MAX); radio.stopListening(); } /** * Main loop. */ void loop() { for (uint8_t reader = 0; reader < NR_OF_READERS; reader++) { // Look for new cards if (mfrc522[reader].PICC_IsNewCardPresent() && mfrc522[reader].PICC_ReadCardSerial()) { Serial.print(F("Reader ")); Serial.print(reader); // Show some details of the PICC (that is: the tag/card) Serial.print(F(": Card UID:")); dump_byte_array(mfrc522[reader].uid.uidByte, mfrc522[reader].uid.size); Serial.println(); mfrc522[reader].PCD_StopCrypto1(); } } } /** * Helper routine to dump a byte array as hex values to Serial. */ void dump_byte_array(byte *buffer, byte bufferSize) { int c[]={176,240,158,94}; int count=0; delay(10); for (byte i = 0; i < bufferSize; i++) { delay(10); Serial.print(buffer[i] < 0x10 ? " 0" : " "); Serial.print(buffer[i], HEX); } Serial.println(); for (byte i = 0; i < bufferSize; i++) { if(buffer[i]==c[i]){ count++; } } int flag=0; if(count==4){ const char text[] = "17624015894"; radio.write(&text, sizeof(text)); }else{ const char text[] = "No"; radio.write(&text, sizeof(text)); } } void before() { // Make sure MFRC is disabled from the SPI bus pinMode(RST_PIN, INPUT); digitalWrite(RST_PIN, HIGH); pinMode(SS_PIN, OUTPUT); digitalWrite(SS_PIN, LOW); } -
@yveaux the problem was in the code and in the circuit, actually both the modules were not working together.
Previously I had to disconnect either one of the module. -
@123cheatn if you make it to work with mysensors, pls report back
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@123cheatn I'm trying very similar project but could not achieve it :(
On master Arduino, RFID UID ID will be read and send to 4 other Arduinos; they will react regarding to UID ID (activate a relay, led etc.). Also those 4 Arduinos have MFRC522 but won't be sending RF UID ID's, just reacting depending on which UID ID read by their reader.
I think I could not solve multiple SPI module code :/ Here is my code;#include <SPI.h> #include <MFRC522.h> #include <RF24.h> #include <NRF24.h> #include <nRF24L01.h> NRF24 radio; unsigned long time_now = 0; int blinkled = 300; int value; int displace = 1000; unsigned long CountDownStarted = 0; int CountdownState = 0; int Set60State = 0; int Set90State = 0; int EngineState = 0; #define EnginePin 6 #define StartPin 7 #define Set90Pin 8 #define Set60Pin 9 #define TestLed 13 String cardUID ; #define SS_RF 10 #define RST 5 #define SS_NRF 53 MFRC522 mfrc522(SS_RF, RST); // Create MFRC522 instance. void setup() { pinMode(EnginePin, OUTPUT); pinMode(StartPin, OUTPUT); pinMode(Set90Pin, OUTPUT); pinMode(Set60Pin, OUTPUT); Serial.begin(115200); // Initiate a serial communication SPI.begin(); // Initiate SPI bus radio.setAddress(0xD2); radio.begin(40, 53); radio.setChannel(124); radio.setRetries(0, 15); radio.setActive(true); pinMode(SS_RF, OUTPUT); pinMode(SS_NRF, OUTPUT); pinMode(TestLed, OUTPUT); digitalWrite(EnginePin, LOW); digitalWrite(StartPin, LOW); digitalWrite(Set90Pin, LOW); digitalWrite(Set60Pin, LOW); digitalWrite(TestLed, LOW); } void loop() { radio.startListening(); if (CountdownState == 1) { CountDown(); } // Look for new cards if ( ! mfrc522.PICC_IsNewCardPresent()) { return; } // Select one of the cards if ( ! mfrc522.PICC_ReadCardSerial()) { return; } //Show UID on serial monitor Serial.print("UID tag :"); String content = ""; byte letter; for (byte i = 0; i < mfrc522.uid.size; i++) { Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "); Serial.print(mfrc522.uid.uidByte[i], HEX); content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ")); content.concat(String(mfrc522.uid.uidByte[i], HEX)); } Serial.println(); Serial.print("Message : "); content.toUpperCase(); if (content.substring(1) == "E0 0A DD A4" || content.substring(1) == "C0 57 FE A7" || content.substring(1) == "B0 AB 9F A5" || content.substring(1) == "50 51 1B A4" ) { if (EngineState == 0) { digitalWrite(EnginePin, HIGH); Serial.print(F("Sending Engine Code... ")); bool sent = radio.send(0xD3, "E0 0A DD A4"); bool sent2 = radio.send(0xD4, "E0 0A DD A4"); bool sent3 = radio.send(0xD5, "E0 0A DD A4"); bool sent4 = radio.send(0xD6, "E0 0A DD A4"); Serial.println(sent ? "OK" : "failed"); Serial.println(sent2 ? "OK" : "failed"); Serial.println(sent3 ? "OK" : "failed"); Serial.println(sent4 ? "OK" : "failed"); EngineState = 1; delay(50); } if (EngineState == 1) { bool sent = radio.send(0xD3, "E0 0A DD A4"); bool sent2 = radio.send(0xD4, "E0 0A DD A4"); bool sent3 = radio.send(0xD5, "E0 0A DD A4"); bool sent4 = radio.send(0xD6, "E0 0A DD A4"); Serial.println(sent ? "OK" : "failed"); Serial.println(sent2 ? "OK" : "failed"); Serial.println(sent3 ? "OK" : "failed"); Serial.println(sent4 ? "OK" : "failed"); delay(100); } } if ((EngineState != 0) && (content.substring(1) == "CD 9E 08 75" || content.substring(1) == "7D A6 4F 75" || content.substring(1) == "8D 2B 55 75" || content.substring(1) == "DD D1 6C 3E" )) { if (CountdownState == 0) { Serial.println("Countdown Started"); digitalWrite(StartPin, HIGH); delay(50); digitalWrite(StartPin, LOW); Serial.print(F("Sending Start Code... ")); bool sent = radio.send(0xD3, "CD 9E 08 75"); bool sent2 = radio.send(0xD4, "CD 9E 08 75"); bool sent3 = radio.send(0xD5, "CD 9E 08 75"); bool sent4 = radio.send(0xD6, "CD 9E 08 75"); Serial.println(sent ? "OK" : "failed"); Serial.println(sent2 ? "OK" : "failed"); Serial.println(sent3 ? "OK" : "failed"); Serial.println(sent4 ? "OK" : "failed"); CountdownState = 1; } if (CountdownState == 1) { Serial.print(F("Sending Start Code... ")); bool sent = radio.send(0xD3, "CD 9E 08 75"); bool sent2 = radio.send(0xD4, "CD 9E 08 75"); bool sent3 = radio.send(0xD5, "CD 9E 08 75"); bool sent4 = radio.send(0xD6, "CD 9E 08 75"); Serial.println(sent ? "OK" : "failed"); Serial.println(sent2 ? "OK" : "failed"); Serial.println(sent3 ? "OK" : "failed"); Serial.println(sent4 ? "OK" : "failed"); delay(100); } } if ((EngineState != 0) && (content.substring(1) == "7D 1C 65 5C" || content.substring(1) == "AD C2 5C 74")) { if (Set90State == 0) { digitalWrite(Set90Pin, HIGH); delay(50); digitalWrite(Set90Pin, LOW); Serial.print(F("Sending 90' Code... ")); bool sent = radio.send(0xD3, "7D 1C 65 5C"); bool sent2 = radio.send(0xD4, "7D 1C 65 5C"); bool sent3 = radio.send(0xD5, "7D 1C 65 5C"); bool sent4 = radio.send(0xD6, "7D 1C 65 5C"); Serial.println(sent ? "OK" : "failed"); Serial.println(sent2 ? "OK" : "failed"); Serial.println(sent3 ? "OK" : "failed"); Serial.println(sent4 ? "OK" : "failed"); Set90State = 1; delay(50); } else { bool sent = radio.send(0xD3, "7D 1C 65 5C"); bool sent2 = radio.send(0xD4, "7D 1C 65 5C"); bool sent3 = radio.send(0xD5, "7D 1C 65 5C"); bool sent4 = radio.send(0xD6, "7D 1C 65 5C"); Serial.println(sent ? "OK" : "failed"); Serial.println(sent2 ? "OK" : "failed"); Serial.println(sent3 ? "OK" : "failed"); Serial.println(sent4 ? "OK" : "failed"); delay(100); } } if ((EngineState != 0) && (content.substring(1) == "20 C4 18 A4" || content.substring(1) == "1D AE 2C 75")) { if (Set60State == 0) { digitalWrite(Set60Pin, HIGH); delay(50); digitalWrite(Set60Pin, LOW); bool sent = radio.send(0xD3, "20 C4 18 A4"); bool sent2 = radio.send(0xD4, "20 C4 18 A4"); bool sent3 = radio.send(0xD5, "20 C4 18 A4"); bool sent4 = radio.send(0xD6, "20 C4 18 A4"); Serial.println(sent ? "OK" : "failed"); Serial.println(sent2 ? "OK" : "failed"); Serial.println(sent3 ? "OK" : "failed"); Serial.println(sent4 ? "OK" : "failed"); Set60State = 1; delay(50); } else { bool sent = radio.send(0xD3, "20 C4 18 A4"); bool sent2 = radio.send(0xD4, "20 C4 18 A4"); bool sent3 = radio.send(0xD5, "20 C4 18 A4"); bool sent4 = radio.send(0xD6, "20 C4 18 A4"); Serial.println(sent ? "OK" : "failed"); Serial.println(sent2 ? "OK" : "failed"); Serial.println(sent3 ? "OK" : "failed"); Serial.println(sent4 ? "OK" : "failed"); delay(100); } } if (radio.available()) { char buf[32]; uint8_t numBytes = radio.read(buf, sizeof(buf)); Serial.print(F("Received: ")); Serial.println(buf); } } void CountDown() { time_now = millis(); value = 128 + 127 * cos(2 * PI / blinkled * time_now); analogWrite(TestLed, value); //Serial.println(value); }Do you have any idea to solve this?
