diff --git a/data/cfg.json b/data/cfg.json
index e1642cd..52b86ca 100644
--- a/data/cfg.json
+++ b/data/cfg.json
@@ -183,8 +183,8 @@
       "camera_capper_identifier" : "8",
       "camera_capper_projector_identifier" : "9",
       "camera_capper_projectors_identifier" : "0",
-      "cap_on" : "A",
-      "cap_off" : "B"
+      "capper_on" : "A",
+      "capper_off" : "B"
     }
   }
 }
diff --git a/src/capper/index.ts b/src/capper/index.ts
new file mode 100644
index 0000000..4c324a3
--- /dev/null
+++ b/src/capper/index.ts
@@ -0,0 +1,107 @@
+'use strict';
+
+import { Intval } from 'intval';
+import { Processing } from 'processing';
+import { delay } from 'delay';
+
+/** class representing capper functions **/
+
+class Capper {
+	private state : any = { 
+		capper : false
+	};
+	private arduino : Arduino = null;
+	private log : any;
+	private cfg : any;
+	private filmout : any;
+	private ui : any;
+	private ipc : any;
+	private id : string = 'capper';
+	/**
+	 *
+	 **/
+	constructor (arduino : Arduino, cfg : any, ui : any, filmout : any) {
+		this.arduino = arduino;
+		this.cfg = cfg;	
+		this.ui = ui;
+		this.filmout = filmout;
+		this.init();
+	}
+
+	/**
+	 *
+	 **/
+	private async init () {
+		const Log = require('log');
+		this.log = await Log({ label : this.id });
+		this.ipc = require('electron').ipcMain;
+		this.listen();
+	}
+
+	/**
+	 *
+	 **/
+	private listen () {
+		this.ipc.on(this.id, this.listener.bind(this));
+	}
+
+	/**
+	 *
+	 **/
+	 public async capper (state : boolean, id : string) {
+		let cmd : string;
+		let ms : number;
+
+		if (state) {
+			cmd = this.cfg.arduino.cmd[`${this.id}_on`];
+		} else {
+			cmd = this.cfg.arduino.cmd[`${this.id}_off`];
+		}
+
+		this.state.capper = state;
+
+		try {
+			ms = await this.arduino.send(this.id, cmd);
+		} catch (err) {
+			this.log.error(err);
+		}
+		return await this.end(cmd, id, ms);
+	}
+
+
+	/**
+	 *
+	 **/
+	private async listener (event : any, arg : any) {
+		if (typeof arg.capper !== 'undefined') {
+			try {
+				await this.capper(arg.capper, arg.id)
+			} catch (err) {
+				this.log.error(err)
+			}
+		}
+		event.returnValue = true
+	}
+
+	/**
+	 *
+	 **/
+	private async end (cmd : string, id : string, ms : number) {
+		let message = '';
+
+		if (cmd === this.cfg.arduino.cmd.capper_on) {
+			message = 'Capper set to ON';
+		} else if (cmd === this.cfg.arduino.cmd.capper_off) {
+			message = 'Capper set to OFF';
+		}
+
+		message += ` ${ms}ms`
+
+		this.log.info(message);
+		this.ui.send(this.id, {cmd: cmd, id : id, ms: ms});
+	}
+}
+
+module.exports = function (arduino : Arduino, cfg : any, ui : any, filmout: any) {
+	return new Capper(arduino, cfg, ui, filmout);
+}
\ No newline at end of file