State persistence of DigitalOutputs through Network Server
Posted: Wed Aug 19, 2020 9:59 am
Hello
I am trying to create a switching system with 4 solid state Phidget relays(link : https://www.phidgets.com/?prodid=1120 ) and Phidget VINT Hub( https://www.phidgets.com/?tier=3&catid= ... prodid=643) by controlling them using the Python API and I am running into a state persistency problem.
I need the relays to keep their state once I close the channels and quit the script.
I saw on this topic : viewtopic.php?t=8471 that using a Phidget may help with this problem but still can't make it work
I am now troubleshooting the problem using one of the Phidget code sample which I modified slightly to control the Phidget remotely.
The way I'm using them is the following :
1: creating 4 DigitalOutput objects and initializing them.
2: Setting the state of the desired relay to True.
3: waiting for a keyboard interruption
4: closing the DigitalOutputs and exiting the script.
I am trying to create a switching system with 4 solid state Phidget relays(link : https://www.phidgets.com/?prodid=1120 ) and Phidget VINT Hub( https://www.phidgets.com/?tier=3&catid= ... prodid=643) by controlling them using the Python API and I am running into a state persistency problem.
I need the relays to keep their state once I close the channels and quit the script.
I saw on this topic : viewtopic.php?t=8471 that using a Phidget may help with this problem but still can't make it work
I am now troubleshooting the problem using one of the Phidget code sample which I modified slightly to control the Phidget remotely.
The way I'm using them is the following :
1: creating 4 DigitalOutput objects and initializing them.
2: Setting the state of the desired relay to True.
3: waiting for a keyboard interruption
4: closing the DigitalOutputs and exiting the script.
Code: Select all
def main():
#instanciantes 4 DigitalOutput Objects
digitalOutput0 = DigitalOutput()
digitalOutput1 = DigitalOutput()
digitalOutput2 = DigitalOutput()
digitalOutput3 = DigitalOutput()
#ininitialize the outputs and enabling remote option
digitalOutput0.setIsHubPortDevice(True)
digitalOutput0.setHubPort(0)
digitalOutput0.setIsRemote(1)
digitalOutput1.setIsHubPortDevice(True)
digitalOutput1.setHubPort(1)
digitalOutput1.setIsRemote(1)
digitalOutput2.setIsHubPortDevice(True)
digitalOutput2.setHubPort(2)
digitalOutput2.setIsRemote(1)
digitalOutput3.setIsHubPortDevice(True)
digitalOutput3.setHubPort(3)
digitalOutput3.setIsRemote(1)
#Search and connect to the server
Net.enableServerDiscovery
(PhidgetServerType.PHIDGETSERVER_DEVICEREMOTE)
digitalOutput0.openWaitForAttachment(5000)
digitalOutput1.openWaitForAttachment(5000)
digitalOutput2.openWaitForAttachment(5000)
digitalOutput3.openWaitForAttachment(5000)
#switching ON digitalOutput2
digitalOutput2.setState(True)
time.sleep(1)
#waiting for a user action to stop the script
try:
input("Press Enter to Stop\n")
except (Exception, KeyboardInterrupt):
pass
#closing the channels
digitalOutput0.close()
digitalOutput1.close()
digitalOutput2.close()
digitalOutput3.close()
main()