This project is very useful in many application where wireless reliable serial communication is required. It give bidirectional communication, You need to have same code in both arduino, no need of separate configuration for receiver or transmitter. It is more advantageous and cost saving than using Xbee, Zegbee Modules.
This circuit is consists of Arduino Pro Mini 3.3V 8MHz and nRF24L01+ RF Module, this make it very low cost and reliable, it can communicate at longer distances when we use nRF24L01+ PA LNA module.
The code is done with most advance possible conditions here I am using custom serial software routine instead of arduino serial to make possible to have 256bytes of serial buffer. arduino have only 64 bytes of serial buffer for longer serial data use of internal buffer causes problems so I made my own serial rutine
Let’s look at its advantages nRF24L01+ modules are very cheap and low power consuming, you can power your circuit using 3V battery also, that’s why I am using Arduino Pro Mini 3.3V 8MHz, you can use any arduino board, only take care that supply to nRF24L01+ module must be 3.3V, nRF24L01+ can take 5V on its IO lines so no need to have any level conversion circuits.
Applications of this projects are limitless you can use it for your robotic applications, remote sensing, wireless remote control, RC air craft as nRF24L01+ PA LNA module can give open air 1000 meter range.
1. nRF24L01+ Quantity 2.
2. Two arduino boards.
Introduction to nRF24L01+:
The nRF24L01+ is a single chip 2.4GHz transceiver with an embedded baseband protocol engine, suitable for ultra low power wireless applications. The nRF24L01+ is designed for operation in the world wide ISM frequency band at 2.400-2.4835GHz.
To design a radio system with the nRF24L01+, you simply need an microcontroller and a few external passive components.
You can operate and configure the nRF24L01+ through a Serial Peripheral Interface (SPI). The register map, which is accessible through the SPI, contains all configuration registers in the nRF24L01+ and is accessible in all operation modes of the chip.
The embedded baseband protocol engine is based on paket communication and supports various modes from manual operation to advanced autonomous protocol operation.
Internal FIFOs ensure a smooth data flow between the radio front end and the system’s microcontroller. Enhanced Shock-Burst reduces system cost by handling all the high speed link layer operations.
The radio front end uses GFSK modulation. It has user configurable parameters like frequency channel, output power and air data rate. nRF24L01+ supports an air data rate of 250kbps, 1Mbps and 2Mbps. The high air data rate combined with two power saving modes make the nRF24L01+ very suitable for ultra low power designs.
Step 1: Circuit Connections of nRF24L01+ with Arduino Pro Mini you can use Arduino Uno also with same code and connections
Read More: Wireless Serial using nRF24L01