Using Arduino UNO, ESP01 module, Thingspeak.com.
1. Temperature and Humidity sensor
https://youtu.be/_aryvTK_vAc
2. SD card module
https://youtu.be/CUhBWAUGLWE
3. Using WiFi module. Basic AT commands
https://youtu.be/dugPCx3iOQ0
4. Using WiFi module. Uploading sensor data to the cloud
https://youtu.be/uzO7PucJ7_w
