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micropython / micropython-lib

Core Python libraries ported to MicroPython
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umqtt subscribe to topic with 23 bytes fails #284

Open DDDanny opened 6 years ago

DDDanny commented 6 years ago

Hi, I can't subscribe to topic longer than 122 bytes. Publishing works fine! I kindly ask you to verify and hopefully fix it Thanks a lot Danny

OK - working:

#122 bytes
mqtt.subscribe(b"/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/2")

but one more character:

#123 bytes
mqtt.subscribe(b"/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/234567890/23") 

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "test.py", line 169, in <module>
  File "umqtt_simple.py", line 154, in subscribe
  File "umqtt_simple.py", line 173, in wait_msg
OSError: -1

this might be related to #163 which also deals with 127 bytes

it might be related to https://github.com/micropython/micropython-lib/blob/f20d89c6aad9443a696561ca2a01f7ef0c8fb302/umqtt.simple/umqtt/simple.py#L148 as this is hitting the 128...

dpgeorge commented 6 years ago

It looks like the subscribe method needs to handle variable length encoding of the payload size, in the same way that connect and publish do.

jonnor commented 2 months ago

This appears ot have been fixed in the linked MRs/commits. Proposing to close this issue.

projectgus commented 2 months ago

Looks like the author's PR was closed last year without merging, so I think this may still be an issue.