Asking for Assistance :Using SD Wireless and Temperature

This video shows Arcade Meowbit sensing temperature and transmitting a signal to Micro:bit for double digit display; if the temperature is above 15 degrees C. I would like help assigning letters of the alphabet to each degree temp from , I guess 15 to 41 C , so that for each degree sensed Meowbit will send an assigned specific letter and Microbit will display that corresponding temp. degree; also, Meowbit will display the same temp number in double-double size as per the video and code below. Thanks to anyone who would like to help out with the program. Extensions needed are installed.
video: https://youtu.be/B3C99wOzEmE
Code: Microbit: https://makecode.microbit.org/_8j5Ya3LLKbzx

Meowbit Arcade : https://makecode.com/_ewr1hYK1sLbV

Sorry, I made this all more complicated than necessary: Video : https://www.youtube.com/watch?v=Hsqcsz6ZRxo
I thought Kittenbot SD Wireless could only transmit one digit at a time, wrong, it can transmit a sensed temperature in 2 numerals and Whaley SansFont can display 0-99 on the Micro:bit screen when received via “radio” from the Arcade Meowbit which also displays the room temperature as a bar graph using ‘status bar’ extension. I display temp as score in Arcade; now to somehow display it as a numeric sprite on the Arcade screen…hum ? Code is in the description of the video.