Divide by zero when HS300 powerstrip is discovered #292
Description
kasa discover throws an error when discovering an HS300 smart strip however if kasa --host <ip address of HS300 smart strip> is run, no error is throw.
For debug, added print(self) to line 223 of smartstrip.py and found that self.children is empty when the device is discovered:
<DeviceType.Strip model HS300(US) at 192.168.1.118 (TP-LINK_Power Strip_DD06), is_on: False - dev specific: {'LED state': True, 'Childs count': 0, 'On since': None}>
but it is populated when an IP is specified:
<DeviceType.Strip model HS300(US) at 192.168.1.118 (TP-LINK_Power Strip_DD06), is_on: True - dev specific: {'LED state': True, 'Childs count': 6, 'On since': datetime.datetime(2022, 1, 10, 18, 40, 32, 272588)}>
<EmeterStatus power=26.093 voltage=123.367 current=0.287 total=32.858>
Here is the start and end of the traceback:
Traceback (most recent call last):
File "/home/depot/.local/bin/kasa", line 8, in <module>
sys.exit(cli())
File "/home/depot/.local/lib/python3.10/site-packages/asyncclick/core.py", line 1150, in __call__
return anyio.run(self._main, main, args, kwargs, **({"backend":_anyio_backend} if _anyio_backend is not None else {}))
...
...
File "/home/depot/.local/lib/python3.10/site-packages/kasa/smartstrip.py", line 229, in emeter_realtime
emeter["voltage_mv"] = int(emeter["voltage_mv"] / len(self.children))
ZeroDivisionError: float division by zero