Thingspeak - no reading data error code 0

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Armand
Armand il 10 Set 2024
Hi,
I've just tried to upload the example sketch ReadField with an Arduino R4, updating the library with WifiS3.h rather than Wifi.h. The network connection is OK.
Unfortunately, I get an error code 0 in the Serial Monitor :
"Problem reading channel. HTTP error code 0"
I d'ont konw what is wrong here and how to fix it. I've read it could be result to the update rate, but the delay of the example seemes to be sufficient (15s).
  5 Commenti
Christopher Stapels
Christopher Stapels il 11 Set 2024
Im sorry, I misread your post, I thought you were writing, not reading. In that case it definitely has nothing to do with the update rate. I would consider trying a different network. Also try using the read command in your browser (also on the api keys tab of your channel;)
Armand
Armand il 24 Set 2024
Sorry for the delay @Christopher Stapels. It works well in the browser so it seems not to be a problem of network.
Moreover, by adapting the WiFiWebClient sketch from Arduino with a GET method on the chanel URL, I've succeed to get the related JSON. But I don't understant why the Thingspeak library doesn't work in my case and how to fix it.

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Risposte (1)

Vinod
Vinod il 24 Set 2024
I believe the key is here "...updating the library with WifiS3.h rather than Wifi.h." My guess is the WiFiS3 library is not exactly functionally equivalent to Wifi library in Arduino. I'd recommend comparing the source of WifiS3 to Wifi to find the difference.
  3 Commenti
Vinod
Vinod il 23 Dic 2024
Modificato: Vinod il 24 Dic 2024
The issue lies deep in the implementation of the Arduino R4's WiFiS3 library, which is used to create the client that is passed into the ThingSpeak library. See the issue I have reported to the maintainers of the repo.
Christopher Stapels
Christopher Stapels il 30 Dic 2024
Hope they get to that soon. Thanks for digging into the issue @Vinod

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