Add command ``Subscribe2 ...``

Add command ``Subscribe2 ...`` to subscribe to a MQTT topic without appended "/#" (#12858)

CHANGELOG.md

@@ -8,6 +8,7 @@ All notable changes to this project will be documented in this file.
 - Turn HTTP API (command ``SetOption128 1``) default on for backward compatibility
 - Support for IEM3155 Wattmeter (#12940)
 - Berry support for vararg
+- Command ``Subscribe2 ...`` to subscribe to a MQTT topic without appended "/#" (#12858)
 
 ### Changed
 - Shelly EM template needs to use GPIO ADE7953_IRQ_2

RELEASENOTES.md

@@ -120,6 +120,7 @@ The latter links can be used for OTA upgrades too like ``OtaUrl http://ota.tasmo
 - Support for CAN bus and Freedom Won Battery Management System by Marius Bezuidenhout [#12651](https://github.com/arendst/Tasmota/issues/12651)
 - Optional IP filter to command ``TCPStart`` [#12806](https://github.com/arendst/Tasmota/issues/12806)
 - Inital support for Wi-Fi extender [#12784](https://github.com/arendst/Tasmota/issues/12784)
+- Command ``Subscribe2 ...`` to subscribe to a MQTT topic without appended "/#" [#12858](https://github.com/arendst/Tasmota/issues/12858)
 - Support for IEM3155 Wattmeter [#12940](https://github.com/arendst/Tasmota/issues/12940)
 
 ### Changed

tasmota/xdrv_10_rules.ino

@@ -1171,7 +1171,11 @@ void CmndSubscribe(void)
       subscription_item.Key = key;
       subscriptions.add(subscription_item);
 
+      if (2 == XdrvMailbox.index) {
+        topic = subscription_item.Topic;  // Do not append "/#""
+      }
       MqttSubscribe(topic.c_str());
+
       events.concat(event_name + "," + topic
         + (key.length()>0 ? "," : "")
         + key);