When you’re using an ESP8266 ... the nodes in the bus network, providing connectivity for up to 1000 feet. Either 12V or 24V DC power runs through the network, stepping down to 5V or 3.3V ...

Over on the Hackaday.io stack, [Radomir] is questioning this basic assumption. He’s wondering if the ESP8266 is 5V tolerant after all. If it is, great. We don’t need level converters ...