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1.0.2 update example and handle serial disconnection gracefully

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geeksville
2020-09-11 11:08:16 -07:00
parent a4d40a209e
commit 6942677b85
3 changed files with 145 additions and 130 deletions
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91
meshtastic/__init__.py
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@@ -31,10 +31,10 @@ type of packet, you should subscribe to the full topic name. If you want to see
import meshtastic
from pubsub import pub
def onReceive(packet): # called when a packet arrives
def onReceive(packet, interface): # called when a packet arrives
print(f"Received: {packet}")
def onConnection(): # called when we (re)connect to the radio
def onConnection(interface, topic): # called when we (re)connect to the radio
# defaults to broadcast, specify a destination ID if you wish
interface.sendText("hello mesh")
@@ -466,47 +466,52 @@ class StreamInterface(MeshInterface):
"""The reader thread that reads bytes from our stream"""
empty = bytes()
while not self._wantExit:
b = self.stream.read(1)
if len(b) > 0:
# logging.debug(f"read returned {b}")
c = b[0]
ptr = len(self._rxBuf)
try:
while not self._wantExit:
b = self.stream.read(1)
if len(b) > 0:
# logging.debug(f"read returned {b}")
c = b[0]
ptr = len(self._rxBuf)
# Assume we want to append this byte, fixme use bytearray instead
self._rxBuf = self._rxBuf + b
# Assume we want to append this byte, fixme use bytearray instead
self._rxBuf = self._rxBuf + b
if ptr == 0: # looking for START1
if c != START1:
self._rxBuf = empty # failed to find start
if self.debugOut != None:
if ptr == 0: # looking for START1
if c != START1:
self._rxBuf = empty # failed to find start
if self.debugOut != None:
try:
self.debugOut.write(b.decode("utf-8"))
except:
self.debugOut.write('?')
elif ptr == 1: # looking for START2
if c != START2:
self.rfBuf = empty # failed to find start2
elif ptr >= HEADER_LEN: # we've at least got a header
# big endian length follos header
packetlen = (self._rxBuf[2] << 8) + self._rxBuf[3]
if ptr == HEADER_LEN: # we _just_ finished reading the header, validate length
if packetlen > MAX_TO_FROM_RADIO_SIZE:
self.rfBuf = empty # length ws out out bounds, restart
if len(self._rxBuf) != 0 and ptr + 1 == packetlen + HEADER_LEN:
try:
self.debugOut.write(b.decode("utf-8"))
except:
self.debugOut.write('?')
elif ptr == 1: # looking for START2
if c != START2:
self.rfBuf = empty # failed to find start2
elif ptr >= HEADER_LEN: # we've at least got a header
# big endian length follos header
packetlen = (self._rxBuf[2] << 8) + self._rxBuf[3]
if ptr == HEADER_LEN: # we _just_ finished reading the header, validate length
if packetlen > MAX_TO_FROM_RADIO_SIZE:
self.rfBuf = empty # length ws out out bounds, restart
if len(self._rxBuf) != 0 and ptr + 1 == packetlen + HEADER_LEN:
try:
self._handleFromRadio(self._rxBuf[HEADER_LEN:])
except Exception as ex:
logging.error(
f"Error handling FromRadio, possibly corrupted? {ex}")
traceback.print_exc()
self._rxBuf = empty
else:
# logging.debug(f"timeout on {self.devPath}")
pass
logging.debug("reader is exiting")
self.stream.close()
self._disconnected()
self._handleFromRadio(self._rxBuf[HEADER_LEN:])
except Exception as ex:
logging.error(
f"Error while handling message from radio {ex}")
traceback.print_exc()
self._rxBuf = empty
else:
# logging.debug(f"timeout on {self.devPath}")
pass
except serial.SerialException as ex:
logging.warn(
"Meshtastic erial port disconnected, disconnecting...")
finally:
logging.debug("reader is exiting")
self.stream.close()
self._disconnected()