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feat: implement robust page reading with error recovery for NFC tags

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This commit is contained in:
Manuel Weiser
2025-08-30 10:17:30 +02:00
parent b9e488d675
commit 7bf9868d79
1 changed files with 31 additions and 31 deletions
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62
src/nfc.cpp
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@@ -108,6 +108,37 @@ bool formatNdefTag() {
return buffer[2]*8;
}
// Robust page reading with error recovery
bool robustPageRead(uint8_t page, uint8_t* buffer) {
const int MAX_READ_ATTEMPTS = 3;
for (int attempt = 0; attempt < MAX_READ_ATTEMPTS; attempt++) {
esp_task_wdt_reset();
yield();
if (nfc.ntag2xx_ReadPage(page, buffer)) {
return true;
}
Serial.printf("Page %d read failed, attempt %d/%d\n", page, attempt + 1, MAX_READ_ATTEMPTS);
// Try to stabilize connection between attempts
if (attempt < MAX_READ_ATTEMPTS - 1) {
vTaskDelay(pdMS_TO_TICKS(25));
// Re-verify tag presence with quick check
uint8_t uid[7];
uint8_t uidLength;
if (!nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength, 100)) {
Serial.println("Tag lost during read operation");
return false;
}
}
}
return false;
}
String detectNtagType()
{
// Read capability container from page 3 to determine exact NTAG type
@@ -1730,37 +1761,6 @@ void startWriteJsonToTag(const bool isSpoolTag, const char* payload) {
}
}
// Robust page reading with error recovery
bool robustPageRead(uint8_t page, uint8_t* buffer) {
const int MAX_READ_ATTEMPTS = 3;
for (int attempt = 0; attempt < MAX_READ_ATTEMPTS; attempt++) {
esp_task_wdt_reset();
yield();
if (nfc.ntag2xx_ReadPage(page, buffer)) {
return true;
}
Serial.printf("Page %d read failed, attempt %d/%d\n", page, attempt + 1, MAX_READ_ATTEMPTS);
// Try to stabilize connection between attempts
if (attempt < MAX_READ_ATTEMPTS - 1) {
vTaskDelay(pdMS_TO_TICKS(25));
// Re-verify tag presence with quick check
uint8_t uid[7];
uint8_t uidLength;
if (!nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength, 100)) {
Serial.println("Tag lost during read operation");
return false;
}
}
}
return false;
}
// Safe tag detection with manual retry logic and short timeouts
bool safeTagDetection(uint8_t* uid, uint8_t* uidLength) {
const int MAX_ATTEMPTS = 3;