Blynk.syncAll()
command restores all the Widget's values based on the last saved values on the server. All analog and digital pin states will be restored. Every Virtual Pin will perform BLYNK_WRITE
event.Blynk.syncVirtual(V0)
or you can update several pins with Blynk.syncVirtual(V0, V1, V2, ...)
.Blynk.virtualWrite(V0, value)
.Blynk.virtualWrite
.Blynk.virtualWrite(V1, 255)
when a physical button gets pressed.