Home Automation

## Overview  A budget friendly approach to replace regular switchboard with smart switchboards. Featuring 1. Six regular switches 2. Two **dimmable** switches, which can be use to regulate AC devices (eg. Ceiling Fan, Tangsten Lamps) 3. One Temperature and Humidity sensor  4. One LDR 5. One Gas Detector (MQ2) 6. One Master Switch to turn of connection to save power / during emergency situations. 7. One fuse All, keeping the pcb easy to assemble by using all through hole pins. This device is a operated though a **ESP32 Devkit C** module, chosen for its wide sprectrum IoT capabilities. ## Intented Usage This module is intended to be operated via customised smartphone-application, with modules installed in all rooms, all connected to the same WLAN network. However the buttons on the Board are for convience and for peace of mind. The Onboard Switches should have higher priority than smart phone. Press and Hold delays should be the key for switching states/modes/levels. The Wifi LED, should be used to dictate other statuses aslo, specifically it can show different blink rates during dimming level selection. The Right Side of the front panel is meant to be easily accessible, as the emergency switch lies there and the cover for the right side must be a mesh (for proper input of the gas sensor). The LDR must be on the surface of the cover. The IR sensors should be covered from all sides except the front glass. The status leds should illuminate the covers printed symbol. The PCB is divided in two upper and lower parts to isolate AC and DC portions and to keep the PCB simple. Copper grounds were not used as loadline AC was used in the PCB. ## ## Limitations 1. Designed to be used with 6A max current flow 2. When Touching the upper portion of the front panel, the bottom ones can also get activated, this should be mitigated by software (eg. If upper half input detected , reject lower ones) 3. As a decoder was used to select the IR Sensors, The uc cannot read all/bulk IR readings at once, however, it won't be a problem, as ESP32's clock speed is high enough. 4. Disconnecting the ESP 32 is tricky as its below the MQ-2 Sensor. 5. DHT11 was used to lower the budget and in Bangladesh temperature stays withing 0-40 degree celcius. ## 3D Models ### Front Panel Front | Back :-------------------------:|:-------------------------:  |  ### Inner Panel Front | Back :-------------------------:|:-------------------------: ![Inner Panel [Front].png](//image.easyeda.com/pullimage/2ZURhEtwcsDIZImBgANPWG5HeqKg0NKAER5ghhT2.png) | ![Inner panel [Back].png](//image.easyeda.com/pullimage/n5ihw0ZmmgSLNqAddroJ8NLlagnBd70lDQ2d10PQ.png)