Can connect in REPL but not with main.py

[SciWax]

@robert-hh Thank you for the advise and fast answer. I really appreciate it. What I really liked about Pycom and their boards was the SSL/TLS support, so I could use it to talk with TLS secured websites out of the box.

So if I would get one ESP32-S3 board and use micropython, I could immediately send a post request to a https website using TLS for web security reasons? I do not need to add a ssl certificate to an ESP32-S3 board myself, right? It will just work out of the box like for the pycom boards?

Kind regards

[robert-hh]

@SciWax There was some discussion in the MicroPython site that for TLS you might have to add your own certificates. Should be in the documentation. Different to Pycom, MicroPython.org does not run any web services.

[SciWax]

@robert-hh Yeah, I've looked in the forums and tried many examples from here. Also this one. I have to check, if "sleeps" also help here in your example code. I'm using the pycom expansion board and connect it to my notebook. I also tried two different WiPys and behaviour was the same.

[robert-hh]

@SciWax About TLS: See https://docs.micropython.org/en/latest/library/ssl.html

[SciWax]

@robert-hh Thank you. Good to know. I can work around the issue I have with the WiPys, because I just use them as a board to easily send data to my server. I just connect them to my other microcontroller board.

[robert-hh]

@SciWax That is still strange. What is the level of P12, the antenna selection pin? Did you change something with it? The default is MAN_ANT, which is the level you force P12 to be. See https://docs.pycom.io/firmwareapi/pycom/network/wlan/

[SciWax]

@robert-hh No, I didn't touch the Pin. I was thinking about it too, but all the tutorials talk about how you only need to touch this Pin, if you want to use an external antenna. Should I pull P12 low just in case? I'm using the internal Antenna.

[robert-hh]

@SciWax You can either put it to a definitive state or use the antanna=WLAN.INT_ANT option in the WLAN constructor. You can as well call wlan.antenna() to see the actual value or call wlan.antenna(WLAN.INT_ANT) to set it to internal antenna.

[robert-hh]

@SciWax If I have WiFi problems it usually also helps to reboot the Access Point.

[SciWax]

@robert-hh I've checked the value of the output of

wlan.antenna()

It was 2 without touching it

with

wlan.antenna(wlan.INT_ANT)

it becomes 0

>>> wlan.antenna()
0

If I upload the code with setting the wlan.antenna to internal nothing changes really:

while not wlan.isconnected()

The code only works every second time, when I reset the board. During the first time attempt, where I just power it (Connecting the expansion board with the usb port), it gets stuck in the while loop, second time when using the reset button the WiPy gets the Wifi connection immediately. When I continue using the reset button again, it is getting stuck again, using it again, it connects immediately. Hence every second time it works. It is a really weird behaviour.

I don't know, if not being aware of the board starting with wlan.antenna() being 2 did something funny with the hardware. Does 2 stand for selecting the external antenna? Maybe that broke the WiPy a little, because this behaviour is so strange. It can't be my code I think.

When I have access to my other expansion boards, I will try another one and a fresh WiPy with setting the wlan.antenna to internal. Then Ive checked everything on a hardware level.

[SciWax]

@robert-hh Unfortunately during my project, I have no access to the access point and can't reboot it.

[robert-hh]

@SciWax said in Can connect in REPL but not with main.py:

Does 2 stand for selecting the external antenna?

2 stands for MAN_ANT: taking the value from P12 to select the antenna mode.

[SciWax]

@robert-hh okay, makes sense regarding the documentation. thanks for the information