WFS Class
- ID: wfs
- Name: Water Flow Sensor
- Other Names: Grove Water Flow Sensor
- Category: liquid
- Manufacturer: seeed
- Link: http://wiki.seeedstudio.com/wiki/G1/2_Water_Flow_sensor
- Connection: gpio
- Kit: eak
This sensor is used to measure water flow in liters per minute (LPM). It incorporates a Hall Effect sensor. The UPM module defines an interrupt routine to be triggered on each low pulse, keeping count. This device requires a 10K pull-up resistor for the signal line (yellow wire). There is a schematic diagram on the SeeedStudio site (3/2015): http://www.seeedstudio.com/wiki/index.php?title=G1/2_Water_Flow_sensor
However, be careful when wiring this up - the schematic appears to have a bug in it: the lower left connection of the signal line (yellow) to Vcc (red) should not be there. The sensor can work with this connection, but probably not for very long.
Item Index
Methods
WFS
-
pin
Water Flow Sensor constructor
Parameters:
-
pinNumberDigital pin to use
Returns:
getMillis
()
Number
Returns the number of milliseconds elapsed since initClock() was last called.
Returns:
Elapsed milliseconds
initClock
()
Resets the clock
clearFlowCounter
()
Resets the flow counter to 0. The flow counter should be stopped via stopFlowCounter() prior to calling this function.
startFlowCounter
()
Starts the flow counter
stopFlowCounter
()
Stops the flow counter
flowCounter
()
Number
Gets the flow counter
Returns:
Flow counter
flowRate
()
Number
Computes the flow rate in liters per minute (LPM). Note, this is for the Grove WFS . If you are using some other WFS , you should compute the flow rate on your own based on the data for your sensor.
Returns:
Computed flow rate