Comments on: Getting Started with WiFi on Raspberry PI Pico W and MicroPython

By: peppe8o

peppe8o — Wed, 24 Jan 2024 16:00:16 +0000

In reply to Jim. Hi Jim, -70 is measured in dBm, a common measurement unit for radio waves in terms of power loss from the radio source. The best is 0 dBm, even quite never rechable as radio transmission involves a not null power reduction

By: Jim

Jim — Wed, 24 Jan 2024 15:48:59 +0000

You state “signals from “-70” are usable with common WiFi)”, “from” is ambigous, what does “from -70” actually mean, is it “-70 to 0” or “-70 to -9999”?

By: peppe8o

peppe8o — Fri, 14 Oct 2022 13:59:46 +0000

In reply to Mike Thierry. Hi Mike, the code exception is the one you correctly identified. I would double check SSID and password: for example, characters link the "-" (minus) or brakets can bring errors if copied from some advanced text editors like MS Word or similar. If these parameters are ok, you should add a print(str(wlan.status())) line in the code just before the identified code lines and see the resulting error code. Then, you can check what the error code means at the Raspberry PI Pico W datasheet https://datasheets.raspberrypi.com/picow/connecting-to-the-internet-with-pico-w.pdf in the "3.6.1. Connection status codes" section

By: Mike Thierry

Mike Thierry — Fri, 14 Oct 2022 09:02:36 +0000

Hi peppe8o,
Great tutorial, very analytical thank you.
I have a problem though, I can’t connect to my wifi ap.I get an error :
“RuntimeError: network connection failed”.
So I see that wlan.status() != 3 to bring this problem. How do I go about troubleshooting this issue? Thank you!
Mike

By: peppe8o

peppe8o — Thu, 18 Aug 2022 17:35:07 +0000

In reply to Peter. It should be a default request from the browser, it doesn't start from the Pico. I don't think that we can do more... Nevertheless, as said it shouldn't affect your code.

By: Peter

Peter — Thu, 18 Aug 2022 17:15:15 +0000

In reply to peppe8o. Thanks! That makes sense. Also noticed, that while I'm on my iPhone, I only get one request (iPhone13 PRO/Safari). Is there a way we can get rid of this favicon connection? Or filter this connection in any way?

By: peppe8o

peppe8o — Thu, 18 Aug 2022 09:14:59 +0000

In reply to Peter. Hi Peter. Just tested. On each conection, the second request is for the favicon: the icon that the browser shows in your tabs near the page title. That's just the browser requesting for the favicon, but it shouldn't affect the result.

By: Peter

Peter — Tue, 16 Aug 2022 02:00:35 +0000

Great tutorial! I have one issue. When I visit http://10.0.0.8/light/on it works fine, but I’ve noticed, that this code executes twice. Maybe this is the chrome issue (something like background preloading)? To summarize – every time I click on a link the code runs twice, not once, like it is supposed to. I get two lines:

“client connected from (‘10.0.0.8’, XXXXX)”
“client connected from (‘10.0.0.8’, XXXXX+1)”

Any idea how to fix this?

By: peppe8o

peppe8o — Sat, 13 Aug 2022 07:50:42 +0000

In reply to AR.

Hi Alasdair,
your one is a good suggestion for a new post… I hope to be able to arrange it in next days. Anyway, the simpler way you should be able, on client request, to open the file, read and print it on HTML. From the client side, using a wget and redirecting the output to a text file should give a first, basic solution

By: AR

AR — Wed, 10 Aug 2022 21:56:55 +0000

Thanks peppe8o – very useful indeed.
One thing I hope you can help me with – is it possible to have the published webpage to include a download link to download a log file from the Pico W?
I am using mine to sample a bunch of temperature probe data, activate relays as a result and log a bunch of data, and woudl love to be able to have it publish a very simple web page where i could access that data as a .log file dowload or the equivalent.
Any thoughts appreciated.