Unfortunately, unless we hear something from the engineers at Espressif, we won’t know if the ESP8266 was designed to be 5V tolerant, if it can handle 5V signals reliably, or if 5V signals are a ...

For the end user, it doesn’t matter all that much, but if saving money on IP licensing fees is what allows Espressif to include a more modern peripheral set for the ESP8266 price, then we’re ...