Re: [paho-dev] Embedded MQTT C Client

[Guy Dillen <guy.dillen@xxxxxxxxx>]

Ian,

MQTTClient and MQTTClient-C are built on top of, and use MQTTPacket.

That still means, even using options the 2 or 3, the sources under the
MQTTPacket branch still need to be imported?


Thanks.
Guy


On 23/09/14 14:27, "Ian Craggs" <icraggs@xxxxxxxxxxxxxxxxxxxxxxx> wrote:

>
>One last thing to mention is that MQTTClient and MQTTClient-C are built
>on top of, and use MQTTPacket.
>
>Ian
>
>On 09/23/2014 11:43 AM, Guy Dillen wrote:
>> Thanks Ian to clarify things.
>>
>> On 23/09/14 11:59, "Ian Craggs" <icraggs@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
>>
>>> To be clear, there are a number of options for embedded clients now.
>>>
>>> 1) use the lowest-level MQTTPacket library, which is used by Benjamin
>>>in
>>> his tutorial videos.  Thanks Benjamin!
>>>
>>> 2) use the higher level C++ embedded MQTTClient library.  This was
>>> written first of all for mbed, where C++,  rather than C, is the
>>>defacto
>>> programming language.    This is C++ without STL (char* not String) and
>>> still without dynamic memory allocation.
>>>
>>> This is also working for the Arduino, and is an API that looks fairly
>>> Arduino-like.  I've created an Arduino library out of this code.
>>>
>>> 3) Use the C version of 2), in the MQTTClient-C directory.  This was
>>> written by Al as a C "copy" of the C++ library, for those environments
>>> which struggle with C++ or for which C is the preferred language.
>>>
>>> Options 2) and 3) are more helpful than 1), but use more resources.
>>>
>>> The CC3200 environment is not conducive to C++ development, from Al's
>>> experience, so 1) or 3) are the options to consider.
>>>
>>> Ian
>>>
>>>
>>> On 09/22/2014 05:05 PM, Al Stockdill-Mander wrote:
>>>> The CC3200 code relies on the SimpleLink libraries provided by TI. I'm
>>>> not familiar with the Spark Core but it looks like it's designed to be
>>>> similar to the arduino in terms of IDE and libraries. It will almost
>>>> certainly be easier to port the arduino embedded C++ library. If you
>>>> look in the repo at the moment under arduino there is EthernetStack.h
>>>> and WifiIPStack.h, these provide the implementation specifics for the
>>>> Ethernet or WifiShield on an arduino.
>>>> Looking at the Spark site there seem to be most of the equivalent
>>>> functions (.connect() .available() .write()) under TCPClient, although
>>>> it doesn't seem to have a readBytes() so you'd have to use a loop to
>>>> read() a byte at a time into the buffer.
>>>> The current Countdown.h in the arduino directory should work as is as
>>>> it only uses millis() which also seems to be on the spark core.
>>>>
>>>> Al
>>>>
>>>> On 22/09/14 16:44, Guy Dillen wrote:
>>>>> Hi Al,
>>>>>
>>>>> Thanks.
>>>>> Besides the TI CC3200 I also would like porting/using the library
>>>>> with my Spark Core's (www.spark.io) based on that are based on the
>>>>> ARM cortex M3 microprocessor. I suppose, since I'm no expert C
>>>>> developer, can I use the same source code as for the CC3200? Any
>>>>> help/suggestions welcome.
>>>>>
>>>>> Thanks.
>>>>> Guy
>>>>>
>>>>> Sent from my iPad
>>>>>
>>>>>> On 22 Sep 2014, at 17:13, Al Stockdill-Mander <asm@xxxxxxxx> wrote:
>>>>>>
>>>>>> Guy,
>>>>>>
>>>>>> Copy the MQTTClient.c/h and MQTTCC3200.c/h files to wherever is
>>>>>> suitable for the app you're working on. You only need to import the
>>>>>> MQTTClient.h, but you have to edit MQTTClient.h to #include the
>>>>>> platform specific implementation it is to use. Currently there is
>>>>>> only the CC3200 code, so add a #import "MQTTCC3200.h" to the end of
>>>>>> the #includes in MQTTClient.h
>>>>>> I realise that there is a distinct lack of documentation/samples for
>>>>>> the C specific embedded client, I'll try and get something up asap.
>>>>>> In the mean time please ask any other questions here and I'll do
>>>>>> what I can to help.
>>>>>>
>>>>>> Al
>>>>>>
>>>>>>> On 22/09/14 14:56, Guy Dillen wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> I mentioned the embedded C implementation has a specific C (and
>>>>>>>even
>>>>>>> more specific) CC3200 implementation.
>>>>>>> I¹m confused as what sources to use; in the example form Benjamin
>>>>>>> Cabé
>>>>>>> all source code under MQTTPacket was imported in the CC3200
>>>>>>> microcontroller project. Should I still import these sources or
>>>>>>> only the
>>>>>>> sources under
>>>>>>> org.eclipse.paho.mqtt.embedded-c-master -> MQTTClient-C -> cc3200
>>>>>>>->
>>>>>>> MQTTCC3200.c and MQTTCC3200.h?
>>>>>>>
>>>>>>> Thanks.
>>>>>>> Guy
>>>>>>>
>>>>>>>
>>>>>>>
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>>> -- 
>>> Ian Craggs
>>> icraggs@xxxxxxxxxx                 IBM United Kingdom
>>> Committer on Paho, Mosquitto
>>>
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>
>-- 
>Ian Craggs
>icraggs@xxxxxxxxxx                 IBM United Kingdom
>Committer on Paho, Mosquitto
>
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