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Forum Index : Microcontroller and PC projects : tcp/udp string lengths
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| Malibu Senior Member  Joined: 07/07/2018 Location: AustraliaPosts: 260 |
One for @MatherP to answer I would think... I'm playing around with UDP at the moment, connected to some simple code using PureBasic (I've just started trying to learn it) Type a message in the console, hit enter and the message gets sent to the WebMite by UDP to be processed. Everyting works fine, but I wondered why the MM.MESSAGE$ is limited to a 255 byte string? Might it be better to define it as a LongString, similar to TCP data... or is it even possible? And maybe a feature request for a couple of new variables MM.INFO(TCP PORT) MM.INFO(UDP PORT) that can be used to check what the port numbers are allocated for TCP/UDP John |
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Mixtel90 Guru  Joined: 05/10/2019 Location: United KingdomPosts: 7869 |
Geoff's demo program in the Webmite manual does exactly this, using a LongString for the data. Didn't you define the port numbers as OPTIONs so you know them anyway? :) Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3285 |
There is no demo of UDP in the manual, are you thinking of the TCP client? Geoff Geoff Graham - http://geoffg.net |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 10244 |
As soon as you create a UDP server the code must have somewhere to put an incoming message even if your code isn't yet running. The way it does this is to automatically create a MMBasic variable MM.MESSAGE$. It makes no sense to automatically create a longstring - how big should it be? The 255 byte size of MM.MESSAGE$ is a limitation that you have to work with. I can add the extra MM.INFO( functions but this comes into the category of others I have begrudgingly added - "You set it - so you should already know what it is!!!" Geoff: a simple UDP example may be worth adding to the manual. I'll post a simple UDP loopback on the manual thread Edited 2024-12-14 18:38 by matherp |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 7869 |
Sorry Geoff, yes, it's TCP. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| Malibu Senior Member Joined: 07/07/2018 Location: AustraliaPosts: 260 |
I've been fooling around with the UDP in WebMite lately and wrote some code in TwinBasic that might help some others to test UDP functionality. Disclaimers : 1) It's my first time using TwinBasic and according the blurbs, there's no RunTime necessary (like VB6 needs) so it SHOULD run 'as is' as a stand-alone .EXE I don't know if that's true, so if you have any problems running it, please let me know 2) It's a windows app. It's also a 32bit version. Sorry, that's all my TwinBasic version will allow me to do. 3) It's dirty.... very little error traps, it makes a few assumptions and it doesn't ALWAYS work how my mind thinks it should. Anyway, here's a screen shot  ... and the files if there's an interest to try it out UDP Test.zip ... consisting of the App, the WebMite code and a ReadMe file If you would like to install it, you might get windows defender complaining on the first run  Up to you if you want to block it or not  I presume if you block, the App won't function. Give it a crack, see if it's an option for anyone doing WebMite code. It might be helpfull if you're just looking to send simple commands via WiFi As a post note, anyone (like me) that's entrenched in VB6, TwinBasic seems to be a great modern-day alternative  Edited 2024-12-28 17:42 by Malibu John |
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homa Guru Joined: 05/11/2021 Location: GermanyPosts: 467 |
Hi John, Good learning. I didn't even know about twinbasic. It sounds really interesting. I looked at your zip, it also contains the mmbasic part. Would you release the twinbasic part as well? Thank you very much. Matthias |
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