BT presence triggered Door Lock

Projects Programming
1

Hello, I want to built BT presence triggered door lock. I am stuck on coding section.

I can scan nearby bt devices. If a known mac address device is in the range, I want to trigger a relay.

How can I code this ?

if(BTSerial.available())
Serial.write(BTSerial.read());

With thie code, I can see MAC addresses on serial monitor. But I dont know which code to use after.

2

Start by posting your full sketch using code tags when you do

If you can see MAC addresses in the Serial monitor then you can save them to a variable in order to compare them with know addresses

3

UKHeliBob:
Start by posting your full sketch using code tags when you do

If you can see MAC addresses in the Serial monitor then you can save them to a variable in order to compare them with know addresses

I could put HC-05 to sniffing mode. On serial monitor I can see MAC addresses of nearby devices with this sketch. I know I should use that MAC address on an if statement, but I dont know exact code.

#include <SoftwareSerial.h>
SoftwareSerial BTSerial(10,11); //rx,tx
void setup() {
Serial.begin(9600);

BTSerial.begin(57600);

}

void loop()
{
if(BTSerial.available())
Serial.write(BTSerial.read());

if(Serial.available())
BTSerial.write(Serial.read());

}

4

What does your serial data look like? How are the MAC addresses separated?

5

This is serial data. I know "Y"'s are the signal strenght etc... "X"' s are the MAC address. I verified MAC address is correct.

+INQ:XXXX:XX:XXXXXX,YYYYYY,YYYY

6

Does each line start with a + and end with a carriage return ?

If so, then take a look at Serial input basics - updated and use the delimiters as start and end markers to save the whole line in a zero terminated array of chars

Once a line is complete and stored you can parse it to extract the MAC address and compare it with your targets. The thread linked to has an example of parsing a data string

7

Yes, each line start like this.

+INQ:XXX
+INQ:XXX
+INQ:XXX
+INQ:XXX
+INQ:XXX
...

Thanks. I will read the thread.