diff --git a/devices/presence_ticker/.gitignore b/devices/presence_ticker/.gitignore
new file mode 100644
index 0000000..89cc49c
--- /dev/null
+++ b/devices/presence_ticker/.gitignore
@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch
diff --git a/devices/presence_ticker/README.md b/devices/presence_ticker/README.md
new file mode 100644
index 0000000..11a8e19
--- /dev/null
+++ b/devices/presence_ticker/README.md
@@ -0,0 +1,5 @@
+# Presence ticker
+
+It sends state on regular intervals, so that presence of the bearer can be tracked.
+
+![Schematics](docs/presence_sensor_bb.png)
diff --git a/devices/presence_ticker/docs/presence_sensor.fzz b/devices/presence_ticker/docs/presence_sensor.fzz
new file mode 100644
index 0000000..2cdd17a
--- /dev/null
+++ b/devices/presence_ticker/docs/presence_sensor.fzz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:09a14fc2865ec4834054f390ba1b4683c393835ac0aed6e68e30e19e7dae4982
+size 6814
diff --git a/devices/presence_ticker/docs/presence_sensor_bb.png b/devices/presence_ticker/docs/presence_sensor_bb.png
new file mode 100644
index 0000000..13c3656
--- /dev/null
+++ b/devices/presence_ticker/docs/presence_sensor_bb.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1603cb8e433a7ee1fd0a2300dfaf574386b5e681dd17ccebe104cfc635ed038e
+size 120232
diff --git a/devices/presence_ticker/include/README b/devices/presence_ticker/include/README
new file mode 100644
index 0000000..194dcd4
--- /dev/null
+++ b/devices/presence_ticker/include/README
@@ -0,0 +1,39 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html
diff --git a/devices/presence_ticker/lib/README b/devices/presence_ticker/lib/README
new file mode 100644
index 0000000..6debab1
--- /dev/null
+++ b/devices/presence_ticker/lib/README
@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in a an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html
diff --git a/devices/presence_ticker/platformio.ini b/devices/presence_ticker/platformio.ini
new file mode 100644
index 0000000..0025c14
--- /dev/null
+++ b/devices/presence_ticker/platformio.ini
@@ -0,0 +1,24 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:attiny85]
+platform = atmelavr
+board = attiny85
+framework = arduino
+lib_deps =
+	sui77/rc-switch @ ^2.6.4
+lib_extra_dirs = 
+	../../lib
+upload_protocol = stk500v1
+upload_flags = 
+	-P$UPLOAD_PORT
+	-b$UPLOAD_SPEED
+upload_port = /dev/ttyACM0
+upload_speed = 19200
diff --git a/devices/presence_ticker/src/presence_ticker.cpp b/devices/presence_ticker/src/presence_ticker.cpp
new file mode 100644
index 0000000..172d121
--- /dev/null
+++ b/devices/presence_ticker/src/presence_ticker.cpp
@@ -0,0 +1,36 @@
+#include <Arduino.h>
+#include <TinyPower.h>
+#include "ContactSensor.h"
+
+#define MINUTES(value)		(uint16_t)(value*60/8)	// minutes*60(seconds)/8s(WDT)
+#define HOURS(value)		MINUTES(value)*60
+
+#define SEND_INTERVAL		MINUTES(2)
+#define SEND_VCC_INTERVAL	HOURS(6)
+
+// Pins
+#define SENDER_PIN PIN_B2
+
+volatile uint16_t counter = 0;
+ContactSensor sensor(PRESENCE_SENSOR);
+
+void setup() {
+
+	TinySwitch::setup(SENDER_PIN);
+	TinyPower::setup();
+	TinyPower::enableWdt(WDTO_8S);
+}
+
+void loop() {
+	if (counter % SEND_VCC_INTERVAL == 0) {
+		sensor.sendStateAndVoltage(true);
+		counter = 0;
+	} else if (counter % SEND_INTERVAL == 0) {
+		sensor.sendState(true);
+	}
+	TinyPower::sleep();
+}
+
+ISR(WDT_vect) {
+	counter++;
+}
diff --git a/devices/presence_ticker/test/README b/devices/presence_ticker/test/README
new file mode 100644
index 0000000..b94d089
--- /dev/null
+++ b/devices/presence_ticker/test/README
@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Unit Testing and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/page/plus/unit-testing.html
diff --git a/lib/Tiny/Tiny.h b/lib/Tiny/Tiny.h
index 653be12..748d4d9 100644
--- a/lib/Tiny/Tiny.h
+++ b/lib/Tiny/Tiny.h
@@ -35,5 +35,6 @@ enum SensorId : unsigned short {
 	TEMP_SENSOR = 4,
 	LIGHT_SENSOR = 5,
 	MOVEMENT_SENSOR = 6,
-	OIL_SENSOR = 7
+	OIL_SENSOR = 7,
+	PRESENCE_SENSOR = 8
 };
diff --git a/rc-gateway.code-workspace b/rc-gateway.code-workspace
index 5e605b8..db5bd71 100644
--- a/rc-gateway.code-workspace
+++ b/rc-gateway.code-workspace
@@ -1,13 +1,20 @@
 {
 	"folders": [
 		{
+			"name": "rc-gateway",
 			"path": "."
 		},
 		{
+			"name": "temp_sensor",
 			"path": "devices/temp_sensor"
 		},
 		{
+			"name": "oil_sensor",
 			"path": "devices/oil_sensor"
+		},
+		{
+			"name": "presence_ticker",
+			"path": "devices/presence_ticker"
 		}
 	],
 	"settings": {
@@ -46,7 +53,39 @@
 			"iterator": "cpp",
 			"memory": "cpp",
 			"variant": "cpp",
-			"string_view": "cpp"
+			"string_view": "cpp",
+			"regex": "cpp",
+			"cstdint": "cpp",
+			"bit": "cpp",
+			"cctype": "cpp",
+			"clocale": "cpp",
+			"compare": "cpp",
+			"concepts": "cpp",
+			"condition_variable": "cpp",
+			"cstdarg": "cpp",
+			"cstdio": "cpp",
+			"cstring": "cpp",
+			"ctime": "cpp",
+			"cwchar": "cpp",
+			"cwctype": "cpp",
+			"map": "cpp",
+			"set": "cpp",
+			"unordered_map": "cpp",
+			"exception": "cpp",
+			"memory_resource": "cpp",
+			"numeric": "cpp",
+			"initializer_list": "cpp",
+			"iosfwd": "cpp",
+			"mutex": "cpp",
+			"new": "cpp",
+			"ranges": "cpp",
+			"sstream": "cpp",
+			"stdexcept": "cpp",
+			"stop_token": "cpp",
+			"streambuf": "cpp",
+			"thread": "cpp",
+			"cinttypes": "cpp",
+			"typeinfo": "cpp"
 		}
 	}
 }
\ No newline at end of file