Reverse engineering ELRO DB280 Doorbel - Revision history

imported>Ardillo: /* Arduino code to trigger ELRO DB280 doorbel */

2014-02-10T17:34:15Z

Arduino code to trigger ELRO DB280 doorbel

← Older revision		Revision as of 17:34, 10 February 2014
Line 40:		Line 40:
	pinMode(status, OUTPUT); //Define status LED		pinMode(status, OUTPUT); //Define status LED
	digitalWrite(rfout, LOW); //extra check that output is LOW		digitalWrite(rfout, LOW); //extra check that output is LOW
			}
	void loop() {		void loop() {

Fish: Added Category

2013-04-22T13:31:36Z

Added Category

← Older revision		Revision as of 13:31, 22 April 2013
Line 84:		Line 84:
	}		}
	</pre>		</pre>
			[[Category:Projects]]
			[[Category:Reverse enginering]]

Fish at 09:45, 12 December 2012

2012-12-12T09:45:07Z

← Older revision		Revision as of 09:45, 12 December 2012
Line 3:		Line 3:
	The ELRO DB280 is a doorbel system with a wireless remote.		The ELRO DB280 is a doorbel system with a wireless remote.
	The system has a fixed code, although it can be changed quite easily by changing some "solder bridges"		The system has a fixed code, although it can be changed quite easily by changing some "solder bridges"
			=433 Signal encoding=
	We analyzed the wireless signal with an Logic analyzer and a 433 receiver.		We analyzed the wireless signal with an Logic analyzer and a 433 receiver.

Fish: Intro for Arduino code for ELRO DB280 doorbel

2012-12-12T09:43:26Z

Intro for Arduino code for ELRO DB280 doorbel

← Older revision		Revision as of 09:43, 12 December 2012
Line 20:		Line 20:
	*The code is inverted (or it's default up unless it's brought to the ground)		*The code is inverted (or it's default up unless it's brought to the ground)
	*There is a trailer: "010101010"		*There is a trailer: "010101010"

			=Arduino code to trigger ELRO DB280 doorbel=
			This code triggers the ELRO DB280 doorbel, it's a loop and it goes on and on and on...

	<pre>		<pre>
	/*		/*
	This is Fish_ his DoorbelGOon code 0.1		This is Fish_ his DoorbelGOon code 0.1, if you change it, let me know so we can create better verions.
	More info check @fish_ on twitter		More info check @fish_ on twitter
	*/		*/

Fish: Added Arduino code for sending doorbel signals

2012-12-12T09:40:55Z

Added Arduino code for sending doorbel signals

← Older revision		Revision as of 09:40, 12 December 2012
Line 20:		Line 20:
	*The code is inverted (or it's default up unless it's brought to the ground)		*The code is inverted (or it's default up unless it's brought to the ground)
	*There is a trailer: "010101010"		*There is a trailer: "010101010"

			<pre>
			/*
			This is Fish_ his DoorbelGOon code 0.1
			More info check @fish_ on twitter
			*/
			int rfout=12; //rf output pin
			int status=13; //status pin
			int longwait=0; // declare the longwait int

			void setup() {
			// Open serial debug communications and wait for port to open:
			Serial.begin(9600);

			pinMode(rfout, OUTPUT); //Define rf 433 transmitter pin
			pinMode(status, OUTPUT); //Define status LED
			digitalWrite(rfout, LOW); //extra check that output is LOW

			void loop() {

			// Set up a Pulse String of the doorbel
			String stringOne = "0001010101000101010101010"; //first digit is ignored
			int highpulse=750; // Length of the 1 pulse
			int highbreak=300; // Length of the 1 break
			int lowpulse=250; // Length of the 0 pulse
			int lowbreak=900; // Length of the 0 break

			int offtime=1; // Declare the offtime integer
			int ontime=1; // Declare the ontime integer
			int pulselength=25;

			Serial.println(stringOne); //Debug output
			Serial.println(); //Debug enter

			int pulses=0; // Declare the pulses integer

			//This Block gets the 0 or 1 of the string and sets the pulse and break time
			while(pulses < pulselength) {
			if (stringOne.substring(pulses,(pulses+1)) == "0") {
			ontime=highpulse;
			offtime=highbreak;
			} else {
			ontime=lowpulse;
			offtime=lowbreak;
			}
			pulses++;

			//This Block sends the output to the 433 transmitter
			digitalWrite(rfout, HIGH); // pulse on
			delayMicroseconds(offtime);

			digitalWrite(rfout, LOW); // put pulse on low
			delayMicroseconds(ontime);

			}
			digitalWrite(rfout, LOW); // be sure the puls is off (INVERTED!!)
			delay(10); // delay for next pulse series
			longwait++; // add 1 to the longwait value.
			if (longwait>10) {longwait=0; delay(500);} //used for send the next batch of pulses
			}
			</pre>

Fish: Picture adjustment & type

2012-09-25T20:04:46Z

Picture adjustment & type

← Older revision		Revision as of 20:04, 25 September 2012
Line 1:		Line 1:
	[[File:elro_db280.~~jpg~~]]		[[File:elro_db280.png\|300px]]

	The ELRO DB280 is a doorbel system with a wireless remote.		The ELRO DB280 is a doorbel system with a wireless remote.

Fish: Initial reverse enginering Elro DB280 doorbel page

2012-09-25T19:54:12Z

Initial reverse enginering Elro DB280 doorbel page

New page

[[File:elro_db280.jpg]]

The ELRO DB280 is a doorbel system with a wireless remote.
The system has a fixed code, although it can be changed quite easily by changing some "solder bridges"

We analyzed the wireless signal with an Logic analyzer and a 433 receiver.

The jumpers are set:
10000100

After analysing the pulses with the logic analyzer we do see the following
0001010101000101010101010

If we invert the set jumpers and we the code 1 character we see the following:
0 1 1 1 1 0 1 1
0001010101000101010101010

We can conclude:
*Every pulse uses a 0 in front
*The code is inverted (or it's default up unless it's brought to the ground)
*There is a trailer: "010101010"