I'm coding a small class that should be able to turn lights on when I receive an "ON" message from the mqtt broker. The issue I'm having is that the conn()
function connects, and retrieves the message while the on_message()
function awaits this. I haven't been able to use the message as I'm awaiting it and I cant find a solution to do this within the await (usually you just do message = conn()
, when conn()
returns the message). The code below was one of the attempts:
class SpaceCode:
def __init__(self, subscription, broker):
self.subscription = subscription
self.broker = broker
def turn_off(self, message):
pass
async def conn(self):
async with Client(self.broker) as client:
async with client.filtered_messages(self.subscription) as messages:
await client.subscribe(self.subscription)
async for message in messages:
return message
async def main(self):
try:
await asyncio.wait_for(self.movement_detected(), timeout=900)
except asyncio.TimeoutError:
turn_off(topic)
async def movement_detected(self):
await self.on_message()
async def on_message(self):
await self.conn()
message = self.conn()
if "ON" in str(message.payload.decode("utf-8")):
return str(message.payload.decode("utf-8"))
The error it returns then is "AttributeError:'coroutine' object has no attribute payload" which makes sense, I used a coroutine I did not await but even when just doing await message = self.conn()
it will result in an error.
Thanks to @NobbyNobbs, the solution was to to await the coroutine and assign it to the variable at the same time. My version:
await self.conn()
message = self.conn()
The correct version:
await message = self.conn()
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.