ESP32 SD writes but doesn't append

[skendhajd]

I've got a microSD module adapter from the far east, and so far so good, and although it can create files using writeFile, it does not append messages. It returns true, i.e: message appended successfully but when you read the file on the computer or when ESP32 reads on reboot, it's blank.

This is how I call the function:

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1. char* sdFileName = "/v.ea";
2. if (appendFile(SD, sdFileName, "Heyy")) {
3. //success
4. } else {
5. //failed
6. }

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I've even tried the writeFile function with

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file.seek(EOF)

but no luck. When calling appendFile for the first time, this appears:

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1. [W][sd_diskio.cpp:149] sdCommand(): token error [17] 0x17
2. Appending succesfully.

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When the appendFile is called for the second time, this appears in serial monitor:

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1. [W][sd_diskio.cpp:149] sdCommand(): token error [17] 0x17
2. [W][sd_diskio.cpp:149] sdCommand(): token error [17] 0x5
3. [W][sd_diskio.cpp:149] sdCommand(): token error [17] 0x5
4. [E][vfs_api.cpp:265] VFSFileImpl(): fopen(/sd/v.ea) failed
5. Appending failed.

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I am using two SPI devices: MFRC522, and before calling SD's functions, I do a

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digitalWrite(SD_SS, LOW)

to "enable" the SD functions till it completes its operations and returns back to

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HIGH 

to disable it.

I've also tried both FAT32 and FAT, no success.
The example in SD(esp32) works fine - writing, appending, deleting, renaming, etc. all work well.

Thanks in advance.

UPDATE: seems like

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rfid.init();

is causing the problem. When I remove it, the appending works fine. As I said, I'm using two SPI with a 330Ohm resistor between MISO and microSD adapter module. Though, before SD functions, I use this function:

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1. void activate_SD() {
2.   rfid.PCD_SoftPowerDown();
3.   digitalWrite(MFRC522_SSPin, HIGH);
4.   digitalWrite(SDMOD_SS, LOW);
5.   if (DEBUG == 1) {
6.     Serial.println("SD is active.");
7.   }
8. }

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Then after SD operations are completed, I use this:

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1. void activate_RFID() {
2.   rfid.PCD_SoftPowerUp();
3.   rfid.PCD_Init();
4.   digitalWrite(SDMOD_SS, HIGH);
5.   digitalWrite(MFRC522_SSPin, LOW);
6.   if (DEBUG == 1) {
7.     Serial.println("RFID is active.");
8.   }
9. }

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But it doesn't help.