A Step-by-Step Guide to Building Your Own Blynk Alternative With Node.js, Socket.io, and ESP8266 Microcontroller
Full tutorial at Instructables or hackster.io
https://www.instructables.com/Build-Your-Own-IoT-Platform-Using-Nodejs-and-ESP82/
Full tutorial at Instructables or hackster.io
https://www.instructables.com/Build-Your-Own-IoT-Platform-Using-Nodejs-and-ESP82/