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[readme] Words about retain

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hsaturn
2023-03-22 20:34:15 +01:00
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README.md
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@@ -65,6 +65,13 @@ TinyMqtt is a small, fast and capable Mqtt Broker and Client for Esp8266 / Esp32
- tinymqtt-test : This is a complex sketch with a terminal console
that allows to add clients publish, connect etc with interpreted commands.
## Retained messages
Qos 1 is not supported, but retained messages are. So a new subscription is able to send old messages.
This feature is disabled by default.
The default retain parameter of MqttBroker::MqttBroker takes an optional (0 by default) number of retained messages.
MqttBroker::retain(n) will also make the broker store n messages at max.
## Standalone mode (zeroconf)
-> The zeroconf mode is not yet implemented
zeroconf clients to connect to broker on local network.