pyRadioHeadNRF24

Requirements:

• bcm2835 (http://www.airspayce.com/mikem/bcm2835)
• cffi (http://cffi.readthedocs.io/en/latest/index.html)

Compiling:

Move to the main directory and run:

make

Wirings:

pyRadioHeadNRF24 uses the standard RadioHead nRF24L01(+) wirings

  RasPi    pin            nRF24L01
  3.3V       1 ------------- VCC   (3.3V in)
GPIO25      22 ------------- CE   (chip enable in)
GPIO8       24 ------------- CSN   (chip select in)
GPIO11      23 ------------- SCK   (SPI clock in)
GPIO10      19 ------------- SDI/MOSI (SPI Data in)
GPIO9       21 ------------- SDO/MISO (SPI data out)
                             IRQ   (Interrupt output, not connected)
   GND       6 ------------- GND   (ground in)

(http://www.airspayce.com/mikem/arduino/RadioHead/classRH__NRF24.html)

Writing programs using pyRadioHeadNRF24

• Import the module: import pyRadioHeadNRF24 as Radio

• If the program is in a different directory, the path to pyRadioHeadNRF24 need to be added to PYTHONPATH

Using directly the Driver with no Manager

• Instantiate an object of the nRF24 class: nrf24 = Radio.nRF24()
• Call the initalizer: nrf24.init()
• Set the channel: nrf24.setChannel(<CHANNEL>)
• Set radio frequency details: nrf24.setRF(<DATA_RATE>, <TRANSMIT_POWER>), with possible values:
  • DataRate1Mbps
  • DataRate2Mbps
  • TransmitPower0dBm
  • TransmitPower6dBm
  • TransmitPower12dBm
  • TransmitPower18dBm
• Optionally set network address: nrf24.setNetworkAddress(<ADDRESS>, <ADDRESS_LEN>)

Sending and Receiving

nrf24.send(msg, len(msg))  
nrf24.waitPacketSent()  


if nrf24.available():  
    (msg, l) = nrf24.recv()    

Using the ReliableDatagram Manager

• Instantiate an object of the nRF24 class: nrf24 = Radio.nRF24()
• Call the initalizer: nrf24.managerInit(<MY_ADDRESS>), where the address is an integer

Sending and Receiving

 nrf24.sendtoWait(msg, len(msg), destination)  


if nrf24.available():  
     (msg, l, source) = nrf24.recvfromAck()

Running Examples:

Once the package is compiled run:

sudo ./examples/server.py

or

sudo ./examples/reliable_datagram_server.py