SD card doesn't work on pysense

[Henning]

I have the same or a similar issue. Upon sd = machine.SD() I get "OSError: the requested operation failed
MicroPython v1.8.6-849-83e2f7f on 2018-03-19; FiPy with ESP32"

import os
import machine
[...]
### SD Card
sd = machine.SD()
os.mount(sd, '/sd')
# check the content
os.listdir('/sd')
# try some standard file operations
f = open('/sd/test.txt', 'w')
f.write('Testing SD card write operations')
f.close()

[jmarcelino]

@freddy
That seems to mean the SD module hasn't been imported, did you do from machine import SD first?

[freddy]

@jmarcelino made a little bit of progress, was abble to read out the content of the card, however suddenly out of nowhere a new issue popped up, i get the following error:

Traceback (most recent call last):
File "<stdin>", line 13, in <module>
NameError: name 'SD' is not defined

Do you maybe know a fix to that?

[jmarcelino]

@freddy
Can you try another card please?

[freddy]

@jmarcelino tried it, i get exactly the same error

[jmarcelino]

@freddy
Can you try to format the SD card on the Pysense?

import os
from machine import SD
sd=SD()
os.mount(sd,'/sd')
os.mkfs(‘/sd')