Difference between revisions of "Microduino-Module nRF"

Microduino-nRF24

Microduino-nRF24 is a high-speed embedded wireless data transmission module.

Features

• Fully integrated link layer on the module makes it easy to develop.
• With automatic retransmission function, it can automatically detect and resend lost packets and the retransmission time and frequency can be controlled by software.
• With packets that can automatically save un-received response signals.
• With automatic reply function, the module can send response signal automatically after receiving valid data and need no reprogramming.
• Capable of setting six receiving channels' address synchronously and opening the receiving channels selectively.
• Standard pin 2.54mm spacing interface, making it convenient for embedded application.
• Small, stackable and economic.
• Open source hardware circuit design and Arduino compatible programming development environment.
• With a uniform Microduino interface standard and rich peripheral modules, it can easily connect with other Microduino modules and sensors.
• 2.54mm(0.1 inch) pin pitch, compatible with bread boards and pegboards.

Specification

• Global open 2.4GHz ISM band with the maximum transmission power of 0DBM and free license to use.
• Low operation voltage: 1.9-3.6 V.
• SMA antenna, easy to change.
• Support six channels' data transmission.
• High rate: 2MBPS. Due to short transmission rate in the air, it largely reduces collision in wireless transmission. (Set 2MBPS or 256 KBPS, 1 MBPS air transmission rate with software)
• Multi-point frequency: With 125 frequency points, it meets the requirement of multi-point communication and frequency hopping communication.
• Low consumption: With fast air transmission and startup, it greatly reduces the current consumption when communicating in the response mode.

Pin Description

Microduino-nRF24 Spec

Document

Eagle PCB File:Microduino-nRF24.zip

Main Components

• Chip：File:NRF24L01 datasheet.pdf
• crystal：File:HCX-3SB-16M.pdf

Development

Arduino library and support package

• Use RF24 library, refer to RF24 library file and RF24Network library file：
  • https://github.com/Microduino/Microduino_Tutorials/tree/master/Microduino_Libraries/_03_Microduino_nRF_RF24
  • https://github.com/Microduino/Microduino_Tutorials/tree/master/Microduino_Libraries/_03_Microduino_nRF_RF24Network

Application

Download Program

Test Program：File:Program Test NRF.zip

Two Microduino core communicate via Nrf24

• Prepared hardware：Microduino FT232R, Microduino Core*2, Microduino Nrf24*2;
• Prepared software：Microduino example program (Arduino part), Arduino IDE(1.0 release and upper), RF24 library, RF24Network library；
• Copy the downlaoded library to libraries folod of Arduino IDE;
• Start Arduino IED, open Microduino example program, select board "Microduino Core (Atmega328P@16M,5V)", download directly；
• The sending and receiving wiring picture：

Sending wiring picture

Receiving wiring picture

• Observation
  • Sending end can control receiving end's LED by button.
  • Sending end potentiometer can control the lightness of LED for receiving end.

FQA

• Does this module have the antenna?
  • Yes.
• Does this module support the voltage conversion from 5V to 3.3V?
  • Core and Core+ module doesn’t support this voltage conversion.
• How to control this module running in low power consumption mode or close it directly?
  • You use the function pwerDwon() offered by Arduino library.
• What's the work range of this module?
  • 100 meters in the open area.

Bug

History

Picture

Microduino nRF24 Front

Microduino nRF24 Back

Video