I AM GENERATING A PWM EXTERNALLY (OUTPUT FROM A WATER SENSOR) AND FEED IT TO A NRF51422 BOARD. I WANT TO COUNT THE PULSE COUNT(LOW TO HIGH TRANSITIONS ONLY). CAN I DO IT WITH APP_TIMER OR JUST TIMER. I THINK THERE IS ONLY 3 TIMERS PRESENT SO AT MOST I CAN INTERFACE ONLY 3 WATER SENSORS AND COUNT THREE INDIVIDUAL PULSES. SO IF I USE APP_TIMER IS IT POSSIBLE FOR ME TO INTERFACE MORE WATER SENSORS AND COUNT THE PULSES INDEPENDENTLY SIMULTANEOUSLY. PLEASE TELL WHICH IS BETTER
