Getting -401 error code when using WritingMulitpleFields
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I modified the WriteMultipleFields example to include a MAX31855 which measures the board temp and a K-type thermocouple. I seem to be getting the "Problem updating channel. HTTP error code -401" in my seriel monitor however it seems to updating my channel properly. I copied and pasted my API so I dont think there is a typo, especially since it updates the channel. Any ideas on how to fix this? or can it be left alone since it still works?
Also, can you change the timezone in the visualization from GMT to a different zone? I updated my profile but that didn't do it
I am using an Arduino Nano 33 IoT
Christopher Stapels on 17 May 2021
There are two calls to writefields in your code, I don't see a delay between them. I see a delay at the end of 20 seconds. I would expect you to get a 429 error, but can you try removing one of the calls to writefields, and see if the error stops? The channel would update correctly as you said, and then also return the error on the second call.
When you chnge your prodile time zone your charts should update to the profile timezone unless they are custom visualizations witha set timezone. Can you sign out and in and then let us know if you still see this problem?
More Answers (1)
Vinod on 15 May 2021
What is most likely happening is you are making requests to the server far exceeding your allowed data rate. One out of every 15 or more requests is being accepted and updates your channel. The other requests get a 401 and are rejected. These numbers assume you have a free license.
You must immediately reduce your rate of updating ThingSpeak to less than one update every 15s. Otherwise, it will be treated as a deliberate abuse of service and appropriate actions taken.