“A simple prototype to query a web API with ESP8266, get the time until the next bus arrives, and display it on a battery powered LED sign.
What it Is: This tutorial is about how to build a battery powered, internet-connected NeoPixel LED sign to display up-to-date information using Arduino and the ESP8266. It is an extension of my tutorial on how to parse XML data on the ESP, but while that tutorial focused mostly on the code, this is covers how to actually fabricate the signage, drive the LEDs, and tidy up the circuitry a bit.”