uasyncio.udp lockup
Posted: Thu Jun 07, 2018 12:23 am
I'm trying to get udp packets asynchronously, but usayncio locks up and a TimeoutError is not thrown when timeout expires.
Here is the example code with a 1 second timeout that just sits locked up:
Here is the example code with a 1 second timeout that just sits locked up:
Code: Select all
#uasyncio.udp lockup example
import uasyncio as asyncio
import network
import socket
import uasyncio
import uasyncio.udp
import usocket as socket
print('Started')
MCAST_GRP = '224.1.1.1'
MCAST_PORT = 30718
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(('', MCAST_PORT)) # use MCAST_GRP instead of '' to listen only
# to MCAST_GRP, not all groups on MCAST_PORT
loop = asyncio.get_event_loop()
async def lockupdemo():
while True:
resp,addr = yield from uasyncio.wait_for(uasyncio.udp.recvfrom(sock, 4), 1)
print('done')
loop.create_task(lockupdemo()) # Schedule ASAP
loop.run_forever()