ESP8266 Community Forum

- Mon Apr 27, 2015 4:58 am #15778 Yes, i've done different things to feedback and verify correct operation on a different platform, for example on arduino i've done digitalread to check the current state of the pin in question and published to a topic if it's state has changed from previous state, so everytime i send a command to the remote device over mqtt i expect a echo back on a different topic from the remote target, and if i dont receive it then i resend and timeout. I will try to test if it will work on esp and leave it as an example if it does. i guess it's just a complicated way of emulating qos by means of a feedback loop.

I really feel that this combination of esp and arduino ide will be the best option for accelerating and developing this community, and the more useable examples we can provide, the more examples and useable code will in turn be made available.

Gambit

- Mon Apr 27, 2015 6:44 am #15790

Thanks, Gambit! That example's pretty useful. (I guess the publish part was written by the library's author, Nick O’Leary: http://knolleary.net/arduino-client-for-mqtt/.)

how do we make sure that a message published was actually received?

That would require a QoS of 1 or 2, but only 0 is supported by the PubSubClient library, AFAIK So I guess some kind of automatic publishing would be needed from the broker or another client.
Tuan's MQTT library does support all three levels of QoS, as well as other features that PubSubClient lacks.
https://github.com/tuanpmt/esp_mqtt
I wish someone could make it available in the Arduino environment.

Yes I agree and wish a library that had QoS > 0 was available for the arduino platform.

- Mon Apr 27, 2015 7:20 am #15794 Bump

Last edited by Toshi Bass on Mon Apr 27, 2015 1:25 pm, edited 1 time in total.

- Mon Apr 27, 2015 11:28 am #15810 Toshi, thanks for posting, i'm sure the coding is very good, but this subforum (ESP8266 / Arduino) is specifically for using the arduino ide for creating and uploading to the esp8266 , there is another section for Lua/nodemcu code, so personally i cannot test as i prefer this method of control.

Regards

Gambit