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

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Barnard Richards
Barnard Richards 2021-6-16
评论： Barnard Richards 2021-6-18
my code
int x = ThingSpeak.writeFields(myChannelNumber[ChID], myWriteAPIKey[ChID]);
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Vinod
Vinod 2021-6-16
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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Barnard Richards
Barnard Richards 2021-6-17
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.
  2 个评论
Vinod
Vinod 2021-6-17
编辑：Vinod 2021-6-17
Uncomment the following #define in the ThingSpeak library, and it will print out the exact details of what is sent to ThingSpeak servers. You can then calculate the bytes sent.
#define PRINT_DEBUG_MESSAGES
Barnard Richards
Barnard Richards 2021-6-18
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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