If you don’t have an Arduino Uno available feel free to use any Arduino compatible board. Two Arduino boards are required because we will build a complete system with a transmitter and receiver. This can be an AC-DC wall wart, USB power bank, 9V battery, any power source to power the transmitter. An external power supply for one Arduino.315MHz Long Range Wireless RF Module (1 Set of Transmitter and Receiver).The following components are required to build this project The first Arduino board will serve as the transmitter using a pushbutton such that when the push button is pressed, it sends an on/off data via the long-range RF modules to the second Arduino which serving as the receiver, which will turn the LED connected to it on/off in accordance with the signal received. Antenna: Onboard 315MHz dedicated PCB Antenna.įor today’s tutorial, we will demonstrate how to use these modules by creating a simple sketch to send messages between two Arduino fitted with these modules.To increase transmit range, you can increase the power to the transmitted up to 12V DC. Transmission distance: When supply power is 5V, the open area transmission distance is around 150 meters.Some of the specifications of the long-range RF Modules are highlighted below: For instance, when VCC is 5v, the modules are able to reach 150m range in open space, as such, the range can be improved further by increasing the supply voltage. The attainable transmitting power of the modules depends on the voltage applied at it’s VCC pin. The new transceivers work the same way as the cheaper modules, maintaining the same pin configuration/layout, support the same libraries (like the VirtualWire library for Arduino) but the new modules, however, have a greater power output and a solid, convenient PCB antenna which increases range while also keeping things neat. To solve this and give makers more option and value, PMD Way developed these new 315/415 Mhz transceivers. Short-range RF Transceivers like the 433MHz transmitters discussed in one of our previous post are very popular among DIY hobbyist and makers, however, their short-range was a bottleneck for users as they barely offer signal coverage for an area bigger than a standard room.
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