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FONA 808 MQTT message length
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FONA 808 MQTT message length

by DYNAMASOL on Sat Nov 19, 2016 8:38 am

Hi, I am connecting to a server with the MQTT library but the message length is limited. Even when I increase the MAXBUFFERSIZE, the message is not sent once it reaches 109 characters.

Is this a limitation of the SIM808 itself? or what else should I modify in the library in order to send a longer message?

Thank you in advance.

DYNAMASOL
 
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Re: FONA 808 MQTT message length

by adafruit2 on Sun Nov 20, 2016 1:25 pm

its probably a limit of the SIM808 AT message buffer - it has to double buffer the message in an AT command so maybe that's where its limited. if you open an issue on github we'll try to look at why but no ETA at this time (since we aren't even positive what it is! :)

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Re: FONA 808 MQTT message length

by DYNAMASOL on Sun Apr 15, 2018 8:38 am

Hello,

Is there any update on this topic regarding the length of a message using the SIM808?

DYNAMASOL
 
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Re: FONA 808 MQTT message length

by adafruit_support_mike on Mon Apr 16, 2018 2:32 am

I'm afraid we never found any more information about the size of the FONA's internal buffer, or anything else that could relate to the issue.

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