Read a value stored in Blynk APP

drg_iulian · October 7, 2021, 2:39pm

I want to store a value on the ESP-32 Board on the local Blynk server and the ESP-32 Board when it restarts I want to get this value stored automatically in the Blynk application on ESP-32. How can I do that?

PeteKnight · October 7, 2021, 5:25pm

Blynk.syncVirtual(vPin) will cause the server to push the latest value.

Pete.

drg_iulian · October 8, 2021, 7:13am

i have a error

PeteKnight · October 8, 2021, 8:09am

That’s because you’re using the wrong syntax for Blynk.syncVirtual(vPin) command.

You should read the documentation here:

You will also need a BLYNK_WRITE(vPin) handler for V2.

It’s probably best to put your Blynk.syncVirtual command in the special BLYNK_CONNECTED() function so that it is called automatically whenever your device connects or re-connects to your server.

Pete.