BLYNK_CONNECTED how works?

[PeteKnight]

BLYNK_CONNECTED() is a special callback function which is called once, each time the device connects or re-connects to the Blynk server.

If you wish to know if your device is currently connected to the Blynk server then you can use the Blynk.connected() command to test if your device is currently connected to the Blynk server, as I explained in your other topic here…

I want Esp8266 Module will not give any output if it is disconnected from wifi network

You would use a timer to run a function which checks if Blynk.connected() = false. If it is false then you know that your device is no longer connected to the Blynk server and you can take the appropriate action. It actually takes around 18 seconds from the Blynk connection being dropped to Blynk.connected() to change from true to false. If you want a speedier response when the disconnection is caused by WiFi or internet failure then you could check if you are connected to WiFi using the WiFi…

BLYNK_CONNECTED() and Blynk.connected() are different commands with different purposes.

As this is a 6 year old topic, and as you appear to want to have a discussion about the same subject in two different topics, I’m going to close this topic.

Pete.