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I want to be able to send a small amount of data quickly directly from a windows machine to a Raspberry Pi 3 B+.

My restrictions include:

  • Preferably not having any sort of wired connection between the two devices.
  • The nature of the problem involves having both devices being on the move and connected to a guest network that I have no control over.
  • If necessary, I am fine with using some third party API or service such that will help me solve this problem.

What's the best and simplest way to do this?

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    check out MQTT ..... shiftr.io/shiftr-io/demo
    – jsotola
    Commented Jan 6, 2019 at 21:11
  • @jsotola You should post that as an answer and I'll mark it correct. I didn't even know that existed, thanks for the help!
    – Bernie G.
    Commented Jan 6, 2019 at 21:25
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    MQTT is not P2P, so your question seems to disqualify the answer you have accepted. More importantly, your question is problematic because whatever data transfer protocol is best is a matter of opinion. Any suggestion to check out XMPP, HTTP and other XXXP and XXP abbreviation is a valid answer.
    – Dmitry Grigoryev
    Commented Jan 7, 2019 at 9:33

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You could use a MQTT broker to relay the messages.

There are a number of brokers available on the web.

This one is very good for developing your code because of the visual feedback.

https://shiftr.io/try

https://shiftr.io/shiftr-io/demo

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