ESP32 lost connection but Blynk.connected() indicates connected

[PeteKnight]

@Vicar

just to clarify on the heartbeat / Handshake message is this

(in Python speak)

MSG_INTERNAL = const(17)					# Internal Message Command

blynksend(MSG_INTERNAL, 'ver', __version__, 'h-beat', self.heartbeat//1000, 'buff-in', self.buffin, 'dev', sys.platform + ' uPython')                             # Heartbeat Message (Send after connection is successful

This is sent once, after connection with the server, to pass data regarding the device to the server, which includes the heartbeat interval.

The heartbeat is a BLYNK_CMD_PING which is enumerated as 6
The server responds with a BLYNK_SUCCESS which is 200 (C6 in Hex).

There’s more info on this here…

What do the BLYNK_DEBUG Codes(output) mean?

Most of the stuff you’re seeing here seems to come from the BlynkApiMbed.h library file. I think the “<” and “>” symbols indicate the direction of the data. “<” means this is data being sent to the server, “>” means data received from the server. [1501] <[1D|00|01|00] nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn The auth code is being sent to the server. [1920] >[00|00|01|00|C8] The server responds with an enumerated BlynkStatus code of C8, which is Hex for 200, which means “BLYNK_SUCCESS”. These sta…

@Vicar

Or is it each time a value is updated, Virtual Pin or whatever, on the Blynk server? This updated value is seen as a sort of “heartbeat”?

Each time Blynk.run() is executed the device checks if new data (an updated value) has been received from the server. If it has then it executes the write handler for the virtual pin that the data corresponds to.

Pete.