Make sure that all parts came in good shape and no apparent damage is done on the way. Flash Terminal software to Wemos D1 board just to make sure it works.

Solder headers to the Wemos D1 module. Long part of the header should be directed to the motherboard. Make sure to align them right, use motherboard as an aligning tool. When soldered it will be tightly pressed against battery socket.

Start with just one pin each side and double check your work. Then you can proceed to other pins.

Solder headers to the motherboard from the back side.

Assemble 4 brass rings on the screen. Use 4  M2 screws.

Use remaining 4 M2 screws to connect screen to the motherboard firmly. Make sure the screen is well aligned.

Double check screen alignment and solder screen in place.

Open firmware in the Platofrmio IDE. Run [Upload Filesystem Image] firstThen [Upload] task

When ESP restarts it will configure AP point named ESPXXXXXX. Connect to it using your phone and you will be redirected to WiFi captive portal, where you can provide WiFi network credentials. After that Terminal will connect to known WiFi automatically

• Go to http://ESP-XXXXXX page to configure UART settings and enter terminal. Alternatively you can check what IP address on the screen or router logs or using debug output on UART1
• (Alternatively) Please use TCP terminal via telnet on 23 default port: telnet 192.168.4.1

• Connect target device using provided header and you should be able to sent and receive using both described methods