Failures when fetching

[Tigwin]

My display pulls and displays flights successfully, but there are some that fail.

Any idea about this error, I've seen it happen 3 times so far.

Reply is OK!
New flight 2eeb8478 found, clear display
Details lookup saved 5866 bytes.
JSON error
'NoneType' object isn't subscriptable
error parsing JSON, skip displaying this flight

I pulled up the flighttracker url, and next time it happens I'll update this post with what it is returning when this happens.

[smartbutnot]

The error handling is fairly basic and if something expected is missing from the json, it skips it. If it’s happening often you could add in a statement to print the whole json object and see what’s wrong with it…

[Tigwin]

New flight 2eed0f43 found, clear display Details lookup saved 1989 bytes. JSON error 'NoneType' object isn't subscriptable error parsing JSON, skip displaying this flight

{"full_count":14347,"version":4,"2eed0f43":["A0B45C",25.2000,-70.4167,89,3700,85,"","T-F5M","C150","N1443Q",1674314719,"ZPH","","",0,0,"N1443Q",0,""] }

[smartbutnot]

When you do a details lookup on 2eed0f43 it looks like it's missing things like a flight number, which is why the function errors out. Is it happening for many flights? So far I've just had it skip flights with missing data, if people see flights like that some significant % of the time then I'll improve the handling.

[Tigwin]

I'm not sure if they are airforce or what, but I've seen a number of airforce planes on the flight24 website, and private planes. There's some that say "Private" in the json, so not sure what this specific plane is doing. I have seen at least a half dozen when I was watching. No idea how common it is.

[Tigwin]

Hello, here's the latest error:

Get flights... Retrieving data...Reply is OK! No flights found, clear display memory free: 49184 Get flights... Retrieving data...Reply is OK! New flight 2f056964 found, clear display JSON error 'NoneType' object isn't subscriptable error parsing JSON, skip displaying this flight memory free: 49168 Get flights... Retrieving data...Traceback (most recent call last): File "code.py", line 385, in File "code.py", line 361, in get_flights File "adafruit_portalbase/init.py", line 450, in fetch File "adafruit_portalbase/network.py", line 586, in fetch_data File "adafruit_portalbase/network.py", line 505, in fetch File "adafruit_requests.py", line 820, in get File "adafruit_requests.py", line 658, in request File "adafruit_requests.py", line 340, in close ValueError: invalid syntax for integer with base 16

Code done running.

Press any key to enter the REPL. Use CTRL-D to reload.

Adafruit CircuitPython 7.3.3 on 2022-08-29; Adafruit Matrix Portal M4 with samd5 1j19

Attached is the code that was running too.

code.py.txt

[dranovsky]

My flightportal seems to die regularly, the last flight to kill it was 2f062a05 which seems military. After this, it fell off wifi and wouldn't reconnect at all until a manual reset.

Retrieving data...Reply is OK! New flight 2f062a05 found, clear display Details lookup saved 5574 bytes. JSON error 'NoneType' object isn't subscriptable error parsing JSON, skip displaying this flight Connecting to AP xxxxxx Could not connect to internet ('Failed to connect to ssid', b'xxxxxx') Retrying in 3 seconds... Connecting to AP xxxxxx Could not connect to internet ('Failed to connect to ssid', b'xxxxxx')

(repeat, ad infinitum)

[smartbutnot]

This one:

ValueError: invalid syntax for integer with base 16

Seems like it's requests somehow getting into a strange socket state and the connection throwing errors. The good news is that just adding "ValueError" to the exceptions caught should handle it gracefully, will do that now. Remains to be seen if everthing works OK on the next loop, of course.

The connection loop I'm not sure what the situation is, the matrixportal is detecting that it's not got a network connection and trying to reconnect - that's all core adafruit code, so it's not something I can mess with. There's some code here that prints out signal strength, could be worth checking your portal has a solid connection: https://learn.adafruit.com/adafruit-matrixportal-m4/internet-connect

[Tigwin]

JFYI - been running this and there are no more errors, it works great. Thank you