WeMos D1 Pro Mini is an ESP8266 board with 16MB Flash ROM memory, useful for taking unaltered images or data stored in Flash ROM for later usage. However, when flashing MicroPython firmware onto this board, there are steps that need to be done in addition to writing with the 4MB version of the board. (The method for the WeMos D1 R1 mini or ESP8266 board can be seen from this video) In this article, we will try to flash ROM and write a program to display board information.