And my 31th Instructable is here
Detailed step by step instructions on how to create remote LCD Display Wi-Fi for Temperature and Humidity with two ESP8266, connect sensor, the display, and program it all with Visuino arduinoesp8266#Visuino
@Gordon_McLellan What do you mean? Visuino supports generic ESP modules. I have experimented with ESP-12, and actually the first version of this project was done with one NodeMCU and one ESP-01.
@Gordon_McLellan Ohh… boy, sure, you can do it, but connecting the parallel ones is such pain in the but… I did one instructable on those, and I still remember the pain
@Thomas_Machard It is perfectly fine. The 5V comes from the USB power. In general the 3.3V signals from the ESP are compatible with 5V inputs, but in this case it is even better as the connection is I2C with pull-up resistor on the 3.3V side