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Arduino-Based Walkie Talkie using nRF24L01: Nowadays we are living in the area of 4G and 5G. Almost all devices enabled 4G or 5G. However, old technologies like walkie-talkies and RF communication are still used. In this modern age, Arduino-based walkie-talkie is mostly used.
The range of old technology is very short but less costly. If we have to communicate in a company or in a small industry then we use less costly devices like RF communication or walkie-talkie. With the help of a walkie-talkie, we can communicate with each other by pressing the push-to-talk (PTT) button.
The main component of this project is the Arduino Uno and NRF24L01 RF module. The brain of this circuit is Arduino for processing. We are using the NRF24L01 module. It has a 2.4GHz very high-frequency ISM band. Its data rate can be 250kbps, 1mbps, and 2mbps. Due to these features, it is the best choice. It may have 125 channels between 1MHz spacing So 125 people can communicate with each other at a time.
Another advantage of the NRF24L01 module is, Its signals don’t cross interface with other walkie-talkie systems like railway walkie-talkies and police walkie-talkies. A single NRF24L01 module can be attached to 6 other NRF24L01 modules at a time when they are receiving data. The power consumption of the modules is very low it is another advantage of NRF24L01.
There are two types of NRF communion modules commonly used.
The NRF24L01+ has an onboard antenna and its range is only 100 meters. It is not suitable for outdoor communication so use it for indoor communication. Moreover, signals become very poor between the walls.
The NRF24L01 +PA+LNA with an external antenna. PA is used to boost the power of signals before transmission. LNA stands for a low-noise amplifier. It is used to clear the uncertain low level of signals. Due to the external antenna, its range is 1000 meters.
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