Hawk Technical Specifications can be found here - https://www.digitalmatter.com/devices/hawk/hawk-tech-specs/
There is 1 x Digital Input on the Hawk baseboard, with the below spec
- Configurable pull up/pull down
- 0-40V DC input range
- On/Off thresholds
- On >2V
- Off <1 V
- Can be used for pulse counting (max 40Hz)
The Digital Input can be used to monitor a switching input (i.e. door open/closed, pump on/off), or configured for pulse counting.
When used as a switching input, in order to avoid higher sleep current draw, the input should not be left in the range 0.3V → 3.V.
When used for pulse counting - there will be additional battery drain caused by the count, dependant on the speed of pulses - when compared to a device which is sleeping.