Summary I installed ESP8266 based ESP3D module from FYSETC.com on my Tronxy P802MA 3D printer having Melzi 2.0 board with CH340 USB to serial chip. To get the serial out, I soldered pin some wires on pins 2 & 3 of CH340, as seen in the picture. I used 5v and ground pins from ISP to get necessary 5.0 volts for the ESP8266 board. At last, I designed this beautiful case for the module. I hope, you will like it. Please don't forget to give thumbs-up :-) Thanks... Print Settings Printer: Tronxy P802MA
Notes: Print the case-lid in (vertical on side) position as in stl file. This will prevent the side locking clips to break easily. They will bend, but won't break easily. Post-Printing Some filing might be needed for smooth functioning of locking clips.