ESP8266 Developer Zone The Official ESP8266 Forum 2018-11-08T18:26:14+08:00 https://bbs.espressif.com:443/feed.php?f=16&t=23451 2018-11-08T18:26:14+08:00 2018-11-08T18:26:14+08:00 https://bbs.espressif.com:443/viewtopic.php?t=23451&p=35326#p35326 <![CDATA[Re: IPD Passive - Byte Length Wrong]]> Statistics: Posted by Her Mary — Thu Nov 08, 2018 6:26 pm

]]> 2018-10-17T22:33:32+08:00 2018-10-17T22:33:32+08:00 https://bbs.espressif.com:443/viewtopic.php?t=23451&p=34248#p34248 <![CDATA[IPD Passive - Byte Length Wrong]]>
Firstly, thanks soooooo much for the IPD Passive mode, I wrote some code back in June using the standard IPD mode and spent ages trying to get it to reliably work, but gave up in the end, but the new Passive mode is a HUGE improvement.

I have this working but think I have found a bug, I am testing a mqtt connection and the initial MQTT client connection returns 4 Bytes which I need to inspect and validate:

Code:

b' \x02\x00\x00'


Note the first character which is s space.

When I request 4 characters from IPD it actually returns 6 instead (which includes \r\n):

Code:

AT+CIPRECVDATA=4
b'+CIPRECVDATA,4: \x02\x00\x00\r\n'


I have worked around this problem, but suspect that the space at the beginning is somehow breaking the size calculation ?

Statistics: Posted by Guest — Wed Oct 17, 2018 10:33 pm

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