Good evening, I am working on a project on a brightness sensor (tsl2561). Not having arrived yet I used a photoresistor and a led and everything works perfectly. Practically, depending on the light seen by the photoresistor, the LED light is more or less strong and I see the data on the serial monitor. Now I would like to see this data online and they recommended Packet sender to send data packets but I can't. Can anyone help me? Thank you
I suggest you make your nodeMCU to work as a web server so that you can send/read data from it over your local network.
Here is a tutorial on web servers with nodeMCU: https://lastminuteengineers.com/creating-esp8266-web-server-arduino-ide/?
If you want your device to be seen over the internet go for DDNS.