I need to read my water counters regularly each month and it drives me crazy. I simply just hate doing that. I was thinking about the possibility of automating this somehow. What I need is a way to read counters and send it wirelessly to a web server. My first idea was to buy some very old smart phones with Android, create a small app to take pictures on a specific date, and send the picture over the wifi to a server for OCR. An old working Android smartphone is like 30$ though I think. Is it possible to build something cheaper than that?