Interesting project completed that uses a ESP-01 to detect sensor outputs and sends the results to the cloud server. The sensor output may have to be conditioned somewhat if the least expensive ESP device has to be used. In any case, code was written using javascript to talk to the server. So the system is simple at this point. The ESP – 01 sends the results of the measurement to the cloud server and the javascript along with HTML can be accessed via a PC or a IPhone to read the data and generally communicate with the cloud server. The system is working well and further refinements are planned and will be reported. Please visit the Signal Processing Group Inc., website for more info.