![]() ![]() Next, connect the antenna to the mini socket located in the upper left area of the module. There are several ways to do this but the easiest is to use a simple resistor divider (1.69k for the top resistor, and 3.3k for the bottom resistor is a good choice). This means the TX signal (D7) coming from the Arduino Uno must be stepped down to 3.3V so as not to damage the SIM800. ![]() Note that the Arduino Uno uses 5V GPIO whereas the SIM800 uses 3.3V level logic and is not 5V tolerant. Keep in mind that the send pin on the SIM800 connects to the receive pin on the Arduino, and the receive pin on the SIM800 connects to the send pin on the Arduino. These are the serial UART connections which allow communication between the two modules. Then, connect the SIM800 TX and RX to the Arduino D8 and D7 respectively. Now, insert the microSIM card into the back of the SIM800 module. 3.7V Lithium Polymer Battery (Supply for SIM800L).You need to have the following hardware components and installed software on your PC as listed below.įigure 1: SIM800 and Arduino UNO basic connections. This includes ground plus UART send and receive lines. All you need is three lines between the SIM800 and the Arduino. The connections for a basic serial communication setup between an Arduino and the SIM800 are quite simple. Programming & Prototyping Basic Connections WARNING: The SIM800 is an older GSM cellular module, and unfortunately most regions of the world are actively phasing out GSM cellular networks, so it is not recommended for new designs. Nonetheless the SIM800 is a great general purpose cellular module. ![]() Not necessarily the smallest, lowest power or highest performance cellular module available.GSM is also being phased out in most regions. Older 2G technology with limited data speeds (GSM/GPRS).The manufacturer of the SIM800, SimCom, also offers numerous other communication modules including the SIM868 which includes built-in GPS functionality.Very affordable module from a Chinese manufacturer.Small size is ideal for portable products and wearable tech.Extensive features including voice calls, SMS, and internet access.Easy to develop and a popular choice among both hobbyists and product developers.Let’s start by reviewing the pros and cons of the SIM800 so you can decide if this module is the right solution for your project. SIM800 Schematic and PCB Layout Considerations.Sample Project: Low-cost Weather Forecast for Farmers.Downloading a Simple Web Page from the Internet.The SIM800 module is not only great for maker projects, but it can also be an affordable and viable option for use as a cellular communication module in a production product.įREE GUIDE: Introduction to Microcontrollers The SIM800 can do a lot of things but in this article we will focus on the internet capabilities of the module.Īdding the SIM800 module with an Arduino will enable you to develop countless innovative projects. The module is intended to operate like a mobile phone, but it needs external peripherals to function properly. The SIM800 is a cellular communication module that can make calls, send email and SMS texts, and even connect to the internet. The SIM800 from SimCom and the Arduino UNO are very popular due to their support from the hobbyist and developer community. From consumer electronics to business and industrial processes, IoT has changed the way we work. The Internet of Things (IoT) has been a trending field in the world of technology. ![]()
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