ESP32 example with SD card using VSPI MFRC522 RFID reader using HSPI
// ESP32 - SD card using VSPI MFRC522 RFID reader using HSPI
// see https://forum.arduino.cc/t/esp32-initialize-hspi-as-default-spi/1155093/12
/* original SD code from
Rui Santos
Complete project details at https://RandomNerdTutorials.com/esp32-microsd-card-arduino/
*/
#include "FS.h"
#include "SD.h"
#include "SPI.h"
// MFRC522 RFID reader
#include <MFRC522v2.h>
#include <MFRC522DriverSPI.h>
#include <MFRC522DriverPinSimple.h>
#include <MFRC522Debug.h>
// default HSPI pins used by MFRC522 RFID reader
#define HSPI_SCK 14
#define HSPI_MISO 12
#define HSPI_MOSI 13
#define HSPI_CS 15
SPIClass *hspi = new SPIClass(HSPI); // HSPI object used by MFRC522
MFRC522DriverPinSimple ss_1_pin(HSPI_CS); // Configurable, take an unused pin, only HIGH/LOW required, must be different to SS 2.
MFRC522DriverSPI driver_1{ ss_1_pin, *hspi };
MFRC522 reader = driver_1; // Create MFRC522 instance.
// ESP32 RTC
#include <ESP32Time.h>
ESP32Time rtc(3600); // offset in seconds GMT+1
void setup() {
Serial.begin(115200);
delay(2000);
Serial.println("Read MRFC522 RFID card save time and data to SD card");
rtc.setTime(1609459200); // initialise RTC 1st Jan 2021 00:00:00
// setup SD card reader using VSPI
if (!SD.begin()) { // mount card
Serial.println("Card Mount Failed");
return;
}
uint8_t cardType = SD.cardType();
if (cardType == CARD_NONE) {
Serial.println("No SD card attached");
return;
}
Serial.print("SD Card Type: ");
if (cardType == CARD_MMC) {
Serial.println("MMC");
} else if (cardType == CARD_SD) {
Serial.println("SDSC");
} else if (cardType == CARD_SDHC) {
Serial.println("SDHC");
} else {
Serial.println("UNKNOWN");
}
uint64_t cardSize = SD.cardSize() / (1024 * 1024);
Serial.printf("SD Card Size: %lluMB\n", cardSize);
listDir(SD, "/", 0);
Serial.printf("Total space: %lluMB\n", SD.totalBytes() / (1024 * 1024));
Serial.printf("Used space: %lluMB\n", SD.usedBytes() / (1024 * 1024));
// setup MRFC522 RFID reader using HSPI
Serial.print("open MRFC522 RFID reader");
reader.PCD_Init(); // Init MFRC522 card.
MFRC522Debug::PCD_DumpVersionToSerial(reader, Serial);
}
void loop() {
// check Serial input read or delete data file
if (Serial.available()) {
char ch = Serial.read();
if (ch == 'p')
readFile(SD, "/data.txt");
if (ch == 'd')
deleteFile(SD, "/data.txt");
}
// check MFRC522 RFID reader
if (reader.PICC_IsNewCardPresent() && reader.PICC_ReadCardSerial()) {
Serial.print("\n");
Serial.println(rtc.getTime("%A, %B %d %Y %H:%M:%S")); // (String) returns time with specified format
// Show some details of the PICC (that is: the tag/card).
Serial.print(F(" Card UID:"));
MFRC522Debug::PrintUID(Serial, reader.uid);
Serial.print(" PICC type: ");
MFRC522::PICC_Type piccType = reader.PICC_GetType(reader.uid.sak);
Serial.println(MFRC522Debug::PICC_GetTypeName(piccType));
// save card details to SD
String s = rtc.getTime("%A, %d/%m/%Y %H:%M:%S") + " Card UID:";
for (byte i = 0; i < reader.uid.size; i++) {
char text[10] = { 0 };
snprintf(text, 100, " 0x%2X", reader.uid.uidByte[i]);
s += String(text);
}
s += " PICC type: " + String((const char *)MFRC522Debug::PICC_GetTypeName(piccType)) + "\n";
appendFile(SD, "/data.txt", s.c_str());
// Halt PICC.
reader.PICC_HaltA();
// Stop encryption on PCD.
reader.PCD_StopCrypto1();
delay(1000);
}
}
// ************** SD functions **************************
void listDir(fs::FS &fs, const char *dirname, uint8_t levels) {
Serial.printf("Listing directory: %s\n", dirname);
File root = fs.open(dirname);
if (!root) {
Serial.println("Failed to open directory");
return;
}
if (!root.isDirectory()) {
Serial.println("Not a directory");
return;
}
File file = root.openNextFile();
while (file) {
if (file.isDirectory()) {
Serial.print(" DIR : ");
Serial.println(file.name());
if (levels) {
listDir(fs, file.name(), levels - 1);
}
} else {
Serial.print(" FILE: ");
Serial.print(file.name());
Serial.print(" SIZE: ");
Serial.println(file.size());
}
file = root.openNextFile();
}
}
void createDir(fs::FS &fs, const char *path) {
Serial.printf("Creating Dir: %s\n", path);
if (fs.mkdir(path)) {
Serial.println("Dir created");
} else {
Serial.println("mkdir failed");
}
}
void removeDir(fs::FS &fs, const char *path) {
Serial.printf("Removing Dir: %s\n", path);
if (fs.rmdir(path)) {
Serial.println("Dir removed");
} else {
Serial.println("rmdir failed");
}
}
void readFile(fs::FS &fs, const char *path) {
Serial.printf("\nReading file: %s\n", path);
File file = fs.open(path);
if (!file) {
Serial.println("Failed to open file for reading");
return;
}
//Serial.print("Read from file: ");
while (file.available()) {
Serial.write(file.read());
}
file.close();
}
void writeFile(fs::FS &fs, const char *path, const char *message) {
Serial.printf("Writing file: %s\n", path);
File file = fs.open(path, FILE_WRITE);
if (!file) {
Serial.println("Failed to open file for writing");
return;
}
if (file.print(message)) {
Serial.println("File written");
} else {
Serial.println("Write failed");
}
file.close();
}
void appendFile(fs::FS &fs, const char *path, const char *message) {
//Serial.printf("Appending to file: %s\n", path);
File file = fs.open(path, FILE_APPEND);
if (!file) {
Serial.println("Failed to open file for appending");
return;
}
if (file.print(message)) {
//Serial.println("Message appended");
} else {
Serial.println("Append failed");
}
file.close();
}
void renameFile(fs::FS &fs, const char *path1, const char *path2) {
Serial.printf("Renaming file %s to %s\n", path1, path2);
if (fs.rename(path1, path2)) {
Serial.println("File renamed");
} else {
Serial.println("Rename failed");
}
}
void deleteFile(fs::FS &fs, const char *path) {
Serial.printf("Deleting file: %s\n", path);
if (fs.remove(path)) {
Serial.println("File deleted");
} else {
Serial.println("Delete failed");
}
}
void testFileIO(fs::FS &fs, const char *path) {
File file = fs.open(path);
static uint8_t buf[512];
size_t len = 0;
uint32_t start = millis();
uint32_t end = start;
if (file) {
len = file.size();
size_t flen = len;
start = millis();
while (len) {
size_t toRead = len;
if (toRead > 512) {
toRead = 512;
}
file.read(buf, toRead);
len -= toRead;
}
end = millis() - start;
Serial.printf("%u bytes read for %u ms\n", flen, end);
file.close();
} else {
Serial.println("Failed to open file for reading");
}
file = fs.open(path, FILE_WRITE);
if (!file) {
Serial.println("Failed to open file for writing");
return;
}
size_t i;
start = millis();
for (i = 0; i < 2048; i++) {
file.write(buf, 512);
}
end = millis() - start;
Serial.printf("%u bytes written for %u ms\n", 2048 * 512, end);
file.close();
}
test run results
ESP32 SD card test - note VCC to 5V
Read MRFC522 RFID card save time and data to SD card
SD Card Type: SDHC
SD Card Size: 14992MB
Listing directory: /
DIR : System Volume Information
FILE: test.txt SIZE: 1048576
FILE: data.txt SIZE: 891
Total space: 14984MB
Used space: 2MB
open MRFC522 RFID readerFirmware Version: 0x92 = v2.0
dDeleting file: /data.txt
File deleted
Friday, January 01 2021 01:00:14
Card UID: ZZ XX FD C2 PICC type: MIFARE 1KB
Friday, January 01 2021 01:00:18
Card UID: Z0 XF 62 1A PICC type: MIFARE 1KB
Friday, January 01 2021 01:00:19
Card UID: Z0 XF 62 1A PICC type: MIFARE 1KB
Friday, January 01 2021 01:00:22
Card UID: ZZ XX FD C2 PICC type: MIFARE 1KB
Friday, January 01 2021 01:00:23
Card UID: ZZ XX FD C2 PICC type: MIFARE 1KB
Friday, January 01 2021 01:02:30
Card UID: Z0 XF 62 1A PICC type: MIFARE 1KB
p
Reading file: /data.txt
Friday, 01/01/2021 01:00:14 Card UID: 0xZZ 0xXX 0xFD 0xC2 PICC type: MIFARE 1KB
Friday, 01/01/2021 01:00:18 Card UID: 0xZ0 0xXF 0x62 0x1A PICC type: MIFARE 1KB
Friday, 01/01/2021 01:00:19 Card UID: 0xZ0 0xXF 0x62 0x1A PICC type: MIFARE 1KB
Friday, 01/01/2021 01:00:22 Card UID: 0xZZ 0xXX 0xFD 0xC2 PICC type: MIFARE 1KB
Friday, 01/01/2021 01:00:23 Card UID: 0xZZ 0xXX 0xFD 0xC2 PICC type: MIFARE 1KB
Friday, 01/01/2021 01:02:30 Card UID: 0xZ0 0xXF 0x62 0x1A PICC type: MIFARE 1KB
Friday, January 01 2021 01:03:28
Card UID: ZZ XX FD C2 PICC type: MIFARE 1KB
p
Reading file: /data.txt
Friday, 01/01/2021 01:00:14 Card UID: 0xZZ 0xXX 0xFD 0xC2 PICC type: MIFARE 1KB
Friday, 01/01/2021 01:00:18 Card UID: 0xZ0 0xXF 0x62 0x1A PICC type: MIFARE 1KB
Friday, 01/01/2021 01:00:19 Card UID: 0xZ0 0xXF 0x62 0x1A PICC type: MIFARE 1KB
Friday, 01/01/2021 01:00:22 Card UID: 0xZZ 0xXX 0xFD 0xC2 PICC type: MIFARE 1KB
Friday, 01/01/2021 01:00:23 Card UID: 0xZZ 0xXX 0xFD 0xC2 PICC type: MIFARE 1KB
Friday, 01/01/2021 01:02:30 Card UID: 0xZ0 0xXF 0x62 0x1A PICC type: MIFARE 1KB
Friday, 01/01/2021 01:03:28 Card UID: 0xZZ 0xXX 0xFD 0xC2 PICC type: MIFARE 1KB
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