no-appmessage-timeout: libpebble2 code

listen-app-message.py

from threading import Event

from libpebble2.communication import PebbleConnection
from libpebble2.communication.transports.serial import SerialTransport
from libpebble2.protocol.appmessage import AppMessage
from libpebble2.protocol.appmessage import AppMessageACK
from libpebble2.protocol.appmessage import AppMessagePush

pebble = PebbleConnection(SerialTransport("/dev/rfcomm0"))
pebble.connect()
pebble.run_async()
print "connected"

sent_ack_once = False
e = Event()

def handle_message(packet):
    global e, sent_ack_once
    print "message received: {}".format(packet)
    if isinstance(packet.data, AppMessagePush):
        if sent_ack_once:
            print "doing nothing"
        else:
            print "ACKing"
            pebble.send_packet(AppMessage(transaction_id=packet.transaction_id, data=AppMessageACK()))
            sent_ack_once = True
    e.set()

pebble.register_endpoint(AppMessage, handle_message)

print "waiting..."
e.wait()

e = Event()
print "waiting again..."
e.wait()

e = Event()
print "waiting a third time..."
e.wait()