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My setup is a simple raspberry with a 3g dongle shooting mqtt messages to a remote server.

Each message takes less than 50bytes, messages are sent every 10 min which gives a daily network usage of 7kB. Now my provider charges me around 500kB per day.

Any guess for these 2 orders of magnitude?

  • Its a maths question. Maybe it can be answered on Maths Q&A if somebody is looking for an upvote or two. – Piotr Kula May 8 '14 at 15:45
  • @ppumkin 50kB should read 50bytes, simple math =) – lenik May 8 '14 at 16:33
  • Skim error + I didn't get the question but now I do. Still think its off topic. But like @user12668 answered, it may be a provider policy. They might charge him in blocks of 500kb - Because even if they rounded to the kb it doesn't make sense :( – Piotr Kula May 8 '14 at 18:15
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Your pi will need to connect send your data then disconnect from the network on each cycle or you will be charged. Ask your provider for a network breakdown of connection and you may find some interesting activity Kenny

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