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MQTT/en: различия между версиями
Новая страница: «For example, if we now click on the relay button in the web interface (switch its state), we will receive new messages: <pre> /devices/wb-mrm2_130/controls/Relay…»
(Новая страница: «The relay module is controlled by the wb-mqtt-serial driver driver, which has a corresponding topic-"channel"("control") Relay 1. It has a value - 0 (relay off),…») |
(Новая страница: «For example, if we now click on the relay button in the web interface (switch its state), we will receive new messages: <pre> /devices/wb-mrm2_130/controls/Relay…») |
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| Строка 87: | Строка 87: | ||
The relay module is controlled by the wb-mqtt-serial driver driver, which has a corresponding topic-"channel"("control") Relay 1. It has a value - 0 (relay off), and there are two subtopics. One of them is service: the type of "control" is written in the folder /meta/type. Here it is a switch - circuit-breaker. The second subtopic ''/on'' is more interesting: here clients write the state in which they want to set the relay. Note that it may not coincide for some time (spent on the switching process) with the state in which the relay is located. The driver behaves as follows: when receiving a message in the topic ''/devices/wb-mrm2_130/controls/Relay 1/on'', it physically turns on the relay module, and only then writes the new state of the relay to the topic ''/devices/wb-mrm2_130/controls/Relay.'' | The relay module is controlled by the wb-mqtt-serial driver driver, which has a corresponding topic-"channel"("control") Relay 1. It has a value - 0 (relay off), and there are two subtopics. One of them is service: the type of "control" is written in the folder /meta/type. Here it is a switch - circuit-breaker. The second subtopic ''/on'' is more interesting: here clients write the state in which they want to set the relay. Note that it may not coincide for some time (spent on the switching process) with the state in which the relay is located. The driver behaves as follows: when receiving a message in the topic ''/devices/wb-mrm2_130/controls/Relay 1/on'', it physically turns on the relay module, and only then writes the new state of the relay to the topic ''/devices/wb-mrm2_130/controls/Relay.'' | ||
For example, if we now click on the relay button in the web interface (switch its state), we will receive new messages: | |||
<pre> | <pre> | ||
/devices/wb-mrm2_130/controls/Relay 1/on 1 | /devices/wb-mrm2_130/controls/Relay 1/on 1 | ||
/devices/wb-mrm2_130/controls/Relay 1 1 | /devices/wb-mrm2_130/controls/Relay 1 1 | ||
</pre> | </pre> | ||
- | - the web interface first "instructs" to turn on the relay, then the driver turns it on and records the current state in the "channel"("control"). | ||
==Работа с очередью сообщений== | ==Работа с очередью сообщений== | ||