HW is used for testing ESP8266, and MS5803 ( 14 bar ). Nucleo reading sensors every 30/60 second and updating ThingSpeak Chanel.
Just to be sure I added bluetooth module so on each web update data is sent to nearby devices that are connected through bluetooth com port.
HW have Nokia 3310 LCD display to help user to check average values that are sent to web.
LDR is used as detection of ambient light it isn't calibrated in any way :)