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Improve discovery by sending multiple UDP datagrams ()

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As UDP datagrams may get lost in transit, e.g.,  due to poor network connectivity,
we can improve the detection rate by sending multiple datagrams and hoping some
will get through to the devices.

Confirmed to improve the detection by @scubanarc: https://github.com/home-assistant/home-assistant/issues/21966

This is a new configurable option, defaulting to three discover packets.
This commit is contained in:
Teemu R 2019-05-20 21:56:01 -04:00 committed by GitHub
parent 29f75d9566
commit 60add6fa66
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1 changed files with 4 additions and 2 deletions

6
pyHS100/discover.py

@ -16,7 +16,8 @@ class Discover:
@staticmethod
def discover(protocol: TPLinkSmartHomeProtocol = None,
port: int = 9999,
timeout: int = 3) -> Dict[str, SmartDevice]:
timeout: int = 3,
discovery_packets = 3) -> Dict[str, SmartDevice]:
"""
Sends discovery message to 255.255.255.255:9999 in order
to detect available supported devices in the local network,
@ -42,7 +43,8 @@ class Discover:
_LOGGER.debug("Sending discovery to %s:%s", target, port)
encrypted_req = protocol.encrypt(req)
sock.sendto(encrypted_req[4:], (target, port))
for i in range(discovery_packets):
sock.sendto(encrypted_req[4:], (target, port))
devices = {}
_LOGGER.debug("Waiting %s seconds for responses...", timeout)