MicroPython
ESP32 SDCard OSError: 16 #10581
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Hi Community, Problem: My Device:
Pre-Analyse import os
import machine
sd = machine.SDCard(slot=2)
os.mount(sd, "/sd") # mount
os.listdir('/sd') # list directory contentsError-Msg (always the same, it doesn't matter if other code is commented out or not): Looking into the world wide web, github issues and other discussions While I was reading I got the feeling that it has not something to do with the board directly. It looks like to me that the error is inside the ESP-IDF or there was a change in Micropython that was making that error existing? After reading some Issues, Documentation, Discussions and Tutorials I marked down the following links: *Note: tutorials excluded, because old solutions with a blob from @dpgeorge was used. But I found something similar of the blob here. **Issue 429 and 8940 maybe not related to this question, but I'm not very fimilar to ESP-IDF, so added them just in case. SD-Card Frequenz One try was to set a frequenz. -> Note: I'm using a 32GB SanDisk Ultra MicroSdCard. Question: Any Idea how this OSError: 16 is coming up? With these Information I wanted to ask here first, before opening a new issue. |
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Replies: 11 comments 18 replies
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try this:- However, I have had problems with slot=2 (and slot=3). If the code is re-run ,without pressing Stop in Thonny, I get This can be repeated with a very very simple program:- So, as long as your code runs immediately after a reboot it should run fine but it's a pig during development with REPL. It looks like a bug in "MicroPython v1.19.1 on 2022-06-18; ESP32 module with ESP32" to me. The SDCard isn't deleted properly when the program ends. I'm switching to a Pico & CircuitPython for my logger code, maybe I'll have more luck there. |
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Hi, thanks for the reply. I tested your suggestion. But I get the error as well. import os
import machine
sd = machine.SDCard(slot=2)
vfs=os.VfsFat(sd)
os.mount(sd, "/sd") # mount
os.listdir('/sd') # list directory contentsthe error-msg: OSError: [Errno 2] ENOENT I want to point out a other try here as well. In the documentation to vfs is written "On ESP8266/ESP32, the primary filesystem is mounted at I tryed some other stuff more, according to the documentation at v1.19 #vfs. But didn't worked out. Solution as workaround with a module "sdcard.py" in 2021 ? Even this is not working. But it was my last idea anyway. I found the following links to that.
Testcode: Trying to unmount and mount the sd card isn't working. I also tested to not unmount the system, same result. import os
import machine
import sdcard #external sdcard.py load from '/'
print(os.listdir('/'))
os.umount('/')
spi = machine.SPI(2,baudrate=100000,sck=machine.Pin(18),mosi=machine.Pin(23),
miso=machine.Pin(19),polarity=0,phase=0)
sd = sdcard.SDCard(spi, machine.Pin(5))
try:
os.mount(sd, '/sd')
print("SD-Card is mounted on /sd")
except OSError as e:
print(e)
print("SD-Card previously mounted")I get the following error-msg: Please note: I don't want to create a "fix" by using an external sdcard.py file. Then it wouldn't make sense to open an issue to this discussion. And also micropython should grow 😄 I will open up a new issue now. Let's see what the community says to this. I think it is a bug in micropython itself on version v1.19.1 on 2022-06-18 for the ESP32 Dev Kit C V2. |
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Issue opened: #10634 |
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Try: The difference is in the mount command, where it uses the vfs as first argument. Besides that, sdcard.py is a little bit picky about SD card brand, layout & sizes. The card has to have a single FAT partition only, and I used it with cards in the size range from 8GB to 64GB, brands Samsung, Sandisk and Transcend. |
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Hi thank you for idea. Error-Msg stays the same: It looks like the problem is connected to Besides that, sdcard.py is a little bit picky about SD card brand, layout & sizes. The card has to have a single FAT partition only, and I used it with cards in the size range from 8GB to 64GB, brands Samsung, Sandisk and Transcend. -> Yes, but lucky I have a 32GB SanDisk Ultra MicroSdCard. I think that should work. |
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The error code is generated by the VfsFat driver if the device is not ready. So It still looks as if there is no access to the card or the card is not detected. |
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Odd because machine.SDCard works on my nodemcu esp32s. I used an 8gb samsung and a 32gb sandisk Both formatted fat32 and mounted on /sd. My sd device is just a cheap thing off ebay. The sd card code worked for me it just failed whenever I tried to rerun it with REPL without pressing Stop in Thonny first. I wonder if the upload of the UF2 was corrupted. Might be worth erasing flash then reflash the UF2? |
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Yes, I checked and format FAT32 as well again. Error still there.
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I haven't done this before. Would be my first time. How I do that with my ESP32 Dev Kit C V2 ? |
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How did you put micropython on your esp32 before?
Basically, use esptool. For doing it on Windows there's this tutorial
https://microcontrollerslab.com/flash-micropython-firmware-esptool-py-esp32-esp8266/#:~:text=The%20esptool.py%20tools%20can%20be%20used%20on%20Windows%2C,with%20ROM%20bootloader%20to%20flash%20and%20erase%20fimware.
One thought crossing my mind is 'have you connected the SD card CS,MOSI,MISO,SCK,GND,VCC" correctly?
On 01/02/2023 14:04:56, EngineerTrooper ***@***.***> wrote:
reflash the UF2
I haven't done this before. Would be my first time. How I do that with my ESP32 Dev Kit C V2 ?
The Internet shows some tutorials but do you have a specific way in mind, @BNNorman [https://github.com/BNNorman] ?
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I used esptool and also the commands in the tutorial. I reflashed fully the board yesterday to make sure it isn't corrupted. Also I tested v1.18, but error still comes up. Also checked the pins twice or more times. If the cables aren't connected right I get error |
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Using esptool.py to flash the firmware is fine. |
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So I took a plain vanilla ESP32 NodeMCU type, similar to what you use. Firmware version: Everything works fine. |
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I will order a new board now... Hope the error is going away then... |
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If you use an external SD, patch cables or bread boards may be a problem as well. |
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Yes, it is external, but I used the hardware also with ArduinoIDE and ESP-IDF for both it works. If the hardware is not connected correctly I get the error I keep you updated |
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Has the SD card hdw worked on another device? OR perhaps use Arduino IDE to flash an SD card test program? If you have another Dev Kit that would be more convenient.
Sorry to ask such basic questions, I'm running out of ideas and clutching at straws.
On 01/02/2023 14:25:37, EngineerTrooper ***@***.***> wrote:
How did you put micropython on your esp32 before? Basically, use esptool. For doing it on Windows there's this tutorial
I used esptool and also the commands in the tutorial. I reflashed fully the board yesterday to make sure it isn't corrupted. Also I tested v1.18, but error still comes up.
Also checked the pins twice or more times. If the cables aren't connected right I get error [0;31mE (120) sdmmc_sd: sdmmc_init_sd_if_cond: send_if_cond (1) returned 0x108[0m (I did that just to make sure everything is fine, and the hardware is connected correct.)
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I will order a new board, maybe a friend will borrow me his board today. Let's see. I keep you updated. |
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My friend was giving me a TTGO-Koala Esp32 Board. tested the following code: import os
import machine
sd = machine.SDCard(slot=2)
vfs=os.VfsFat(sd)
os.mount(vfs, "/sd") # mount
fn = open('/sd/textsd.txt', 'w')
fn.write('some data')
fn.close()
os.listdir('/sd') # list directory contentsworks like a charm! Thank you for your help and ideas. I think my ESP32 Dev Kit C V2 has a broken arm or leg... don't know. Time for a new one. I close this discussion as solved, now. |
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OSError: [Errno 19] ENODEV |
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I'm getting the same error, can't seem to figure it out. |
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I've encountered a similar issue before; eventually, switching the power supply from 3.3V to 5V did the trick even though the SD card module specifications state that it supports 3.3V. |
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Perhaps a large capacitor close to the SDcard VCC and GND might help. I should have tried that before. Right now I can't test that idea. |
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@
Advik
Not yet, I assumed it was a hardware failure in my board.
Lets see if someone solves it
Matheus Cafalchio, PhD
…On Sat, 20 Apr 2024 at 19:28, Brian ***@***.***> wrote:
Perhaps a large capacitor close to the SDcard VCC and GND might help. I
should have tried that before. Right now I can't test that idea.
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Interesting, do you have any idea what might have caused it? |
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So I finally figured it out, MicroPython seems to only support unpartitioned sd cards, that is without any partition table, I also tried creating a partition table with only one primary partition but that didn't work. sudo mkfs.fat -F 32 /dev/sda |
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Hello, can I simply execute sudo mkfs.fat -F 32 /dev/sdb? I've tried to do so, but I'm still encountering an error. |
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@advik Thank you very much for finding it.
I bet more people will come here to find it out.
Matheus Cafalchio, PhD
…On Sat, 20 Apr 2024 at 23:07, Advik ***@***.***> wrote:
So I finally figured it out, MicroPython seems to only support
*unpartitioned* sd cards, that is without any partition table, I also
tried creating a partition table with only one primary partition but that
didn't work.
If you're facing the same issue then you can format your card on linux
like this (change sda with the block device of your card, find it using
lsblk)
sudo mkfs.fat -F 32 /dev/sda
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I am also having this issue. I know it's not hardware related because I was able to get this to work using circuit python. |
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My friend was giving me a TTGO-Koala Esp32 Board.
With
MicroPython v1.18 on 2022-01-17; ESP32 module with ESP32tested the following code:
works like a charm!
Thank you for your help and ideas. I think my ESP32 Dev Kit C V2 has a broken arm or leg... don't know. Time for a new one.
I close this discussion as solved, now.