Storing the long number(16bits / 32bits) in external flash of arduino or STM32 .

 AUTOMATIC CONTROL THE GARDEN WATERING SYSTEM

I MADE A SIMPLE COMPUTER USING 8051 MICROCONTROLLER . THERE ARE TWO MODES OF THAT DEVICE AUTO AND MANUAL . 

THIS IS WATER TEST SECTION . IT TELL WHICH SIDE OF GARDEN IS DRY OR WET .

PUMP AND LIGHT CAN BE CONTROL AUTOMATICALLY OR OWN SELF TWO OPTIONS FOR LIGHT AND PUMP CONTROL  

THIS IS SIDE VIEW WHERE POWER PIN AND SENSOR IS CONNECTED