annlee wrote: ↑
Sun Sep 23, 2018 6:58 am
well this is for a prototype, in case we go finally for a project we will go for the expensive Libelium solutions
I will use a 3G dongle then, or maybe several rpi's connected via wifi to another rpi with a 3G hat
If you go for the latter have a look at MQTT for passing the data. You may have to encode it if binary or use the file option) but a lot of the transfer code and reliability is ready built for you. It supports a quality of service mode (QoS 3) that delivers the data once and only once
if you have not seen this have a look at https://thenewstack.io/mqtt-protocol-iot/
Good luck with the prototype.
Need Pi spray - these things are breeding in my house...