MKS WiFi has two types: mks robin WiFi and mks TFT WiFi. It means that if you disable the module soldered onto the NodeMCU board, you can attach an external ESP module instead of it.
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Module pinout The ESP12 is more compact and more affordable It has a lower power consumption (even in normal operation), due to the missing extra components, which are often not needed in daily operation – such as the USB to serial converter or the 5V to 3.
The AI-Thinker website has a module list table that includes this. NodeMCU is an ESP-12E or ESP-12F based board with added power and serial circuitry. With the pre-flashed AT firmware, you can control the module through UART AT commands easily. This is a complete 32-bit SoC (System on Chip) with built-in flash memory, frame and EEPROM which can even be programmed directly from the Arduino interface, without the need for additional micro-controller. Connect RX or TX on 5V Arduino will destroy this module. It offers an excellent range of functions in the smallest design.