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thingspeak - Any way to disable "Transfer-Encoding: chunked"?

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When updating a channel with an execute Talkback(https://www.mathworks.com/help/thingspeak/writedataandexecutetalkbackcommand.html), the thingspeak server uses a chunked style body. With weak and intermittent cellular connections, this can cause difficulties. Is there any way to disable this behavior? I believe updating a channel without Talkback does not use chunked encoding.

Accepted Answer

Christopher Stapels
Christopher Stapels on 12 Jan 2021
Edited: Christopher Stapels on 12 Jan 2021
Are you sending a very large command to your device? The talkback response should be quite small. We cannot change the encoding on the response that is sent from a TalkBack, but you can use a ThingSpeak channel as a proxy for TalkBack. Write the command to a channel and have the device read the channel at regular intervals or use MQTT to subscribe to the channel. The subscription will provide the channel contents when they are updated.
  3 Comments
Zachariah Belding
Zachariah Belding on 12 Jan 2021
"Try adding "&headers=false" to your request. That should shorten it up and cause the response to be less likely to be chunked."
Thank you! This will shorten the response quite a bit and reduce data usage!
HTTP/1.1 200 OK
Date: Tue, 12 Jan 2021 11:35:37 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Status: 200 OK
ETag: W/"050a4384880d48b11dc203846aea209c"
Cache-Control: max-age=0, private, must-revalidate
X-Request-Id: 79cb41b5-e471-4a0e-9201-f0f45b21581b
X-Runtime: 0.074885
X-Powered-By: Phusion Passenger 4.0.57
Server: nginx/1.9.3 + Phusion Passenger 4.0.57
86
{"executed_at":"2021-01-12T11:35:37Z","position":null,"id":21390658,"command_string":"146wateron","created_at":"2021-01-12T11:33:06Z"}
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After looking at my issue more, I have determined that I was wrong about the chunked encoding. I am working with raw tcp sockets and I was not giving the response enough time to be fully buffered in the cellular modem I am using. Adding a 250ms delay after the modem first tells me data is available seems to have fixed the issue.

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