The Wifi range achievable with the Pi Zero W is not enough for my application. For that reason, I would like to use a standard Pi Zero and connect it to an external Wifi Module with external Antenna. The antenna properly placed will give me a better range. A USB dongle could work but they are normally too big and heavy for my application.
What I have bought is the D1 MINI PRO, which is based on the ESP-8266EX chip.
The main problem is: D1 MINI PRO requires a UART and in my understanding, the pi Zero has only one (pin 14 and 15). Unfortunately this is already BUSY with another device that is fundamental for the project.
My question is: considering that the UART of the Pi ZERO is already busy, is it possible to connect the D1 MINI PRO to the PI using the Micro USB?
Both D1 MINI PRO and Pi Zero have a micro USB, so I was thinking to wire myself a USB-to-USB cable to link the two. Basically I would like the Pi to see the D1 MINI PRO as the Wifi hardware of the board.
Do you think that is feasible and could you eventually suggest from where I could start?