How to get patterns on POV poi – so many ways!

Over the years I have experimented with so many different ways of getting pixels to update on the poi I make. Basically it boils down to 2 different ways. We send files to the poi from somewhere The poi fetch files from somewhere Looks almost the same, right? Let’s look at a picture: On the left we have Magic Poi. The poi have a list of files and ask “please can I have this file named “pic.bin”. The server responds with the data. On the right we have the Android app SmartPoi_Controls sending images over to the Poi, without asking first. We could use http requests, udp – or even webhooks (I found those to be un-reliable however). That is the current system on SmartPoi. WiFi reliability But what happens if the network is un-reliable? Your neighbour could start streaming Netflix on the same WiFi channel and the transfer could be interrupted! If we are using UDP streaming, the display just stops. Very bad. Http upload is a lot better – we only save the file if it is fully uploaded. If we…