After I've finished the build, I attached my device to the door and made some miner adjustments on threshold values. It looks like ACS712 output voltage depends on it's input voltage. Since USB voltage is lower than 5v, when I powered the device with a regulator, output analog value increased. So I re calibrated my sketch to work with 12v input of the device.

Both Web App and led interface needs some improvements but it still enough functional for first build. Also enclosure need some white paint on become a nice fit for my door.

Further Improvements

• LED interface and Web App UI needs some attention
• Enclosure is pretty damaged after too much testing and calibration. I need to replace it.
• Diffuser affected from the heat of the ESP8266. I need rebuilt it with less layers of material.
• Electronics still takes too much space and also consume too much power. I can use an Esp-07 module to gain some space.
• Bluetooth is needed to automatically trigger unlock when I am close to the outside of the door.
• I need a more secure method from just a pattern lock. I think OTP is the right way secure a device like this.