Hand tools and fabrication machines
When the technology is developed the smart home concept came to the picture as a way of simplifying the day to day activities. Even though the technology is interesting, the investment in such high-tech equipment is difficult for most of us. It is one side highly cost and you may need more technology and to do more research works.Therefore, it is more suitable to use low-cost DIY projects to fulfill the requirement. I am not going to cover all the areas of the Smart Home concept, but this would be more fun and use us to improve our knowledge as well as in the practice.This project is mainly built on the SIM 800 L GPRS/GSM module. This module can be used with a SIM card. All the code related to SIM 800L module can be downloaded from the link below.
You must insert the sim card to the correct Direction as shown in the sim card slot.The SIM 800L module is controlled by the Arduino programme. I have used ATMEGA 328p chip to control the module.
The Circuit Diagram as follow.
Power supply for testing
SIM 800L Wiring in details
THE BEST POWER SUPPLY FOR SIM 800For testing purposes, you can give the power to the module from the 5 volt pin of the arduino. But if you give separate power you have to regulate the voltage t 4.7 volt and it will be more efficient if you use the following module with 2A current.
OUTPUTS IN Different WAYS.I have used 5 output and LEDs are connected to testing purposes. But if you want to connect any other equipment, you can use the following circuit instead of the LEDs.Connection through a RELAYIf you connect a relay like this instead of LEDs, you can control most of devices even 230v requirements as well. Read the circuit well and understand the wiring.
You can change the codes to the following modifications1. Store the ON/OFF situation into the memory: Even the power is disconnected, the settings will be restored to the last situation2.Allow to send codes from any phoneand reply to a specific phone or to the same phone3.Allow to send codes from specific phoneand reply to a specific phone or to the same phone