Amin

@mochi-co @wind-c Very Sorry for late reply. [Mosquitto Broker](https://github.com/eclipse/mosquitto) is very popular MQTT Broker and [Mosquitto Go Auth](https://github.com/iegomez/mosquitto-go-auth) is a 3rd party authentication and authorization plugin. Using this plugins i...

Thanks for your reply. My case without input subscribe permission ` "acc": 4 ` users can also subscribe any topic. I just give permission ` "acc": 3 ` everything working...

Can you give me arduino c language example. I have purchase a board when backside printed was only Board model, version and your web address and no any others information...