Raspberry pico-w TCP query

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Hello,
I'm using an rpi pico-w as a tcp client in a logging project (written in 'C'). By copying the examples, the code is running. After successfully communicating a number of times the "tcp_client_open" function fails when "tcp_new_ip_open" returns with zero. I'm not sure what the function does, and can find no documentation describing reasons for failure. Please could somebody point me to documentation?

What I have tried:

Repeating the "open" fails consistently unless a delay of 2 seconds or more is introduced, when it sometimes recovers; it does not appear to be running out of memory.

Posted 18-Jan-23 1:20am

Les Wilkinson

Updated 18-Jan-23 5:10am

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Richard MacCutchan · Accepted Answer · 2023-01-18T05:10:00

Solution 1

Quote:
Please could somebody point me to documentation

The documentation, if it exists, is likely to come from the same place that the code came from. But we don't know where that is, since you have not said where you got it.

Posted 18-Jan-23 5:10am

Richard MacCutchan

Comments

Les Wilkinson 19-Jan-23 5:07am

Funnily enough I checked there. The example came from "https://github.com/raspberrypi/pico-examples/blob/master/pico_w/tcp_client/picow_tcp_client.c" although it appears in the RPi site as well. The function in question is at line 172.

Richard MacCutchan 19-Jan-23 5:48am

Line 172 really does not tell us anything, so you have two choices:
1. Try to debug the code yourself.
2. Contact the person who wrote it to find out why that call fails.

Les Wilkinson 19-Jan-23 9:23am

Thanks anyway
Le. W.