https://github.com/esp8266/Arduino/releases/download/2.1.0/package_esp8266com_index.json
Bluetooth is connected to D7 (Rx) and D8 (Tx) of Node MCU
BT's Rx -> D7 of Node mCU
BT's TX is connected to D8 of Node MCU
In Arduino IDE they have to install, SoftwareSerial Library , make use of SoftwareSerial for Bluetooth Connection
Android Google App Store HC-05 BT terminal
pair BT in NodeMCU with Mobile Phone (in which App is installed)
1) Follow the steps as in the video tutorial
https://www.youtube.com/watch?v=6iE_2sXUUew
2) Code is given in the folder-(just add your Adafruit user name and API Key) - Code can be downloaded here
3) Don’t foregt to add MD_MAX72XX-master library given in the folder
1) Follow the steps as in the video tutorial
https://www.youtube.com/watch?v=1goTMGq26wE
2) Code is given in the folder-(just add your Adafruit user name and API Key) Code can be downloaded here