There is only scant mention of UDP::receivePacket() in the docs. It should have its own sub-section such as parsePacket() does. I noticed this because of @rickkas7 's very useful code snippet that allows UDP reception to continue when Particle Cloud connection is lost or non-existent. // receivePa…

@timx , Error -26, INVALID_SOCKET, looks to have been caused by configuring the Photon for an external antenna, but not attaching one, giving possibly flakey comms. Case closed!

It seems to be used internally in the UDP class since it’s implementation 2 years ago. I don’t see the equivalent in ArduinoLand though… Definitely useful to have it documented! [image] Issue: Document UDP `receivePacket()` opened by kennethlimcp on 2017-06-21 https://comm…

@rickkas7 , do you know what a return code of -26 means with udp.receivePacket()? // Thanks to rickkas7 // receivePacket() is preferable to parsePacket()/read() because it saves a buffering step but more importantly // it returns an error code if an error occurs! // This is important to reinitia…

[image] Udp error codes listed anywhere? Troubleshooting Hi, OK so I have a Photon app (its no longer a simple one), which used to be able to send UDP packets, but now returns -26 to sendPacket. Are these codes actually defined somewhere please ???. Due to ‘other issues…

@timx , excellent response. Now understand that -26 is INVALID_SOCKET. Your ticket has opened up some clues. Am NOT connecting to the cloud, so perhaps something here… it was working a few hours ago, a bit of code change since then… I will respond back, if and when fixed, for the curious.

UDP::receivePacket() not documented well

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timx August 13, 2017, 10:50am 4

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UDP::receivePacket() not documented well

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