graph TD;
A((Sleep))-->|timer up|B((Wakeup without WiFi));
B-->|4 hours not up|A;
B-->|4 hours up|C((Check for WiFi credentials));
C-->|Has WiFi credentials|D((Connect to WiFi));
C-->|Has no WiFi credentials|E((Setup AP mode));
D-->|Failed to connect to WiFi|E;
D-->|Success in connecting to WiFi|F((Read sensors and send to cloud));
E-->|User puts in the WiFi credentials|D;
F-->|Success or failure in sending to cloud|A;
A-->|User presses the button|G((Read sensors and display));
G-->|Sensor reading complete|H((Check for WiFi Credentials));
H-->|Has WiFi credentials|I((Connected to WiFi));
H-->|Has no WiFi credentials|J((Setup AP mode));
I-->|Fail to connect to WiFi|J;
J-->|User added WiFI credentials|I;
I-->|Success in connecting to WiFi|K((Send to cloud));
K-->L((Display for 10 seconds));
L-->A;