How do I calculate the total number of bytes in my upload write to a Thingspeak channel

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my code
int x = ThingSpeak.writeFields(myChannelNumber[ChID], myWriteAPIKey[ChID]);
  1 Comment
Vinod on 16 Jun 2021
ThingSpeak library handles calculation of payload size and formatting it as needed. Could you help me understand the use case for knowing the number of bytes of the upload -- if available, how would you use this information?

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Accepted Answer

Barnard Richards
Barnard Richards on 17 Jun 2021
I am going to be evaluating a Arduino MKR NB1500 to upload to a Thingspeak channel.
The Cell phone companies charge for the number of bytes transmitted. I want to know how many bytes i might be able to economically upload with particular SIM card account.
I know a Thingspeak message is limited to 3000 bytes.
Barnard Richards
Barnard Richards on 18 Jun 2021
Thanks Vinod,
My suggestion is that it would also be useful for Thingspeak to consider adding a get_data_length function to the Thingspeak library which can be called from the Arduino sketch.
but thanks again.

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