WiFi connect problem with esp32?

[Aduka_27]

Hi guys,
I have a problem with the connection to my WiFi network. Before I used FiPy Pycom board and this works:

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#wifi = WLAN(mode=WLAN.STA_IF)
#wifi.connect(ssid="my_network", auth=(WLAN.WPA2, 'my_pass'))
#while not wifi.isconnected():
    #print("I am in idle state!")
    #machine.idle()
#print("WiFi is up!")
#print(wifi.ifconfig())

First I tried the same code and it did not work. Then I found on MicroPyhon website that the definition is a bit different. Then I tried with this code but again every time it suggest me that the problem is with this part where I define essid and password:

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wlan = network.WLAN(network.STA_IF)
wlan.connect(essid='my_network', password='my_password')

while not wlan.isconnected():
    print("I am in idle state!")
    machine.idle()
print("WiFi is up!")
print(wlan.ifconfig())
time.sleep(1)

What is the issue here?

[Aduka_27]

I solved this issue by implementing this part:

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ssid="my_network"
password = "my_pass"


wlan = network.WLAN(network.STA_IF)
wlan.active(False)
time.sleep(1)

wlan.active(True)
wlan.connect(ssid, password)

while not wlan.isconnected():
    print("I am in idle state!")
    machine.idle()
print("WiFi is up!")
print(wlan.ifconfig())
time.sleep(1)

But now I have a problem to open image (jpg format). I am using standard filesystem functions that should enable me this functionality:

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FNAME = 'image2.jpg'
 f = open(FNAME, 'rb')
m = f.read()
 f.close()

Does anybody know where is the issue here? I am getting this error:

Code: Select all

Unhandled exception in thread started by <function client_thread at 0x3ffcf140>
Traceback (most recent call last):
  File "main.py", line 31, in client_thread
OSError: [Errno 2] ENOENT

Thanks in advance!

[marcidy]

File "main.py", line 31, in client_thread
OSError: [Errno 2] ENOENT

Are you sure the file is being saved in the location you are attempting to access? ENOENT means no such file or directory. you can use the os module to examine the file system.

[Aduka_27]

Same concept with '.txt' files works without problems. Maybe f.open('.jpg') is not supported by pure MicroPython?

[Roberthh]

open() does not care about the file name. The file has to exist at the given path with exactly that name. But maybe it's the size of the file which causes f.read() to fail.

[Aduka_27]

That can be as well. This code was tested on FiPy and it worked, I was able to see the captured image in my browser. I am trying the same with esp32-wroom 32 but seems this one cannot support that, which can also be related to the file size...don't know