How to automaticly switch off relay when bluetooth module not connected with android?
The simplest way is to send a message at regular intervals (perhaps 5 per second) and when the Arduino fails to get a message in time it will know that there has been a communication failure.
...R
Robin2:
The simplest way is to send a message at regular intervals (perhaps 5 per second) and when the Arduino fails to get a message in time it will know that there has been a communication failure....R
could you give me example code please sir..
I am guessing, from your Original Post, that you already have a program that sends data using Buetooth so please post that program.
You need to add some code on the receiving side something like this
if (newData == true) { // when a new message arrives
lastestMessageMillis = millis();
}
if (millis() - lastestMessageMillis >= maxIntervalMillis) {
// the next message has failed to arrive
}
...R