On Thu, 20 Oct 2022 11:11:17 +0200, Bo Berglund via fpc-pascal <fpc-pascal@lists.freepascal.org> wrote:
>On Tue, 11 Oct 2022 19:42:26 +0200 (CEST), Karoly Balogh via fpc-pascal ><fpc-pascal@lists.freepascal.org> wrote: > >>Hi, >> >>On Tue, 11 Oct 2022, Bo Berglund via fpc-pascal wrote: >> >>> I am looking for a pascal implementation of the MQTT protocol. >>> I could not find anything inside Lazarus' OnLinePackageManager. >>> >>> Is there something like that available? >> >>I made a front-end Pascal library, and and Object Pascal wrapper for >>libmosquitto a couple of years ago. It's available here. It's know to work >>on Linux, Windows and macOS at least. It's against libmosquitto 1.x. Not >>sure if 2.x got released meanwhile. I can update things if needed. (Pull >>requests are welcomed.) >> >>It's available here: >>https://github.com/chainq/mosquitto-p > >Well, the version of the mosquitto broker server that gets installed on my >RaspberryPi4 is: > >$ mosquitto --version >Error: Unknown option '--version'. >mosquitto version 2.0.11 >mosquitto is an MQTT v5.0/v3.1.1/v3.1 broker. > >So this is what I have to communicate with as a client. > >I need to be able to publish as well as subscribe to topics. > >In the Lazarus forum I have seen people having problems with this when they use >various FPC packages while the native command line works OK (on Linux), >probably >because they are using old packages not updated for the changes made in MQTT in >recent years. > >So this is why I am asking if there is some MQTT client package available for >FPC/Lazarus that complies to the updated protocols? I found this on the Lazarus forum: https://forum.lazarus.freepascal.org/index.php/topic,54397.msg435050.html#msg435050 Not a poackage, but rather advice on how to utilize binary "drivers" installed on the system via translated header files. Not optimal, but might be doable anyway. I will try that path going forward, just now dealing with the MQTT source devices. -- Bo Berglund Developer in Sweden _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
