Raspberry Pi 2 : GPIO usage (with nRF24L01+, Arduino)

RE: Raspberry Pi 2 : GPIO usage (with nRF24L01+, Arduino)

balearicdynamics — Fri, 20 Jan 2017 12:43:51 GMT

Nice post Lana, don't you think that this flat cable can be too long in some use cases?

Enrico

RE: Raspberry Pi 2 : GPIO usage (with nRF24L01+, Arduino)

lamb95 — Thu, 19 Jan 2017 19:07:23 GMT

Where do you add the raspberry pi code in?

RE: Raspberry Pi 2 : GPIO usage (with nRF24L01+, Arduino)

Former Member — Tue, 10 May 2016 22:01:13 GMT

I’m having trouble getting my Rpi to properly communicate with NRF module. I got the code uploaded and working properly on my Arduino Nano by changing the pins around in the code. I got the code uploaded and compiled properly on the Rpi by adding it to the linux_examples directory and altering the Makefile. However whenever I runt the executable I just get this:

================ SPI Configuration ================

CSN Pin = CE0 (PI Hardware Driven)

CE Pin = Custom GPIO22

Clock Speed = 8 Mhz

================ NRF Configuration ================

STATUS = 0x00 RX_DR=0 TX_DS=0 MAX_RT=0 RX_P_NO=0 TX_FULL=0

RX_ADDR_P0-1 = 0x0000000000 0x0000000000

RX_ADDR_P2-5 = 0x00 0x00 0x00 0x00

TX_ADDR = 0x0000000000

RX_PW_P0-6 = 0x00 0x00 0x00 0x00 0x00 0x00

EN_AA = 0x00

EN_RXADDR = 0x00

RF_CH = 0x00

RF_SETUP = 0x00

CONFIG = 0x00

DYNPD/FEATURE = 0x00 0x00

Data Rate = 1MBPS

Model = nRF24L01

CRC Length = Disabled

PA Power = PA_MIN

Start loop:

Data: ................................

I know SPI is working correctly because I ran the SPI loopback test (described on the SPI documentation page on the Rpi website) and I get the correct output. I also added the linux user im using to the SPI group.

Any help would be MUCH appreciated because im completely lost at this point. thanks

RE: Raspberry Pi 2 : GPIO usage (with nRF24L01+, Arduino)

Former Member — Tue, 22 Mar 2016 13:22:16 GMT

Thanks for the guide!
I'm having a silly little issue. I pasted your Raspberry Pi "c code" (actually c++ code) into nrf-try01.cpp. I did "make" and "sudo make install" with no issues in RF24/RPi/RF24. I saved nrf-try01.cpp to ~/RF24/RPi/. I run g++ on Raspbian:

pi@raspberrypi:~/RF24/RPi $ g++ -std=c++0x -I/home/pi/RF24/RPi nrf-try1.cpp -onrf-try1

And I get:

/tmp/ccApxPxi.o: In function `main':

nrf-try1.cpp:(.text+0x214): undefined reference to `RF24::begin()'
...... (more similar undefined references)

collect2: error: ld returned 1 exit status

I also tried the above command with "-L/home/pi/RF24/RPi" and "-L/home/pi/RF24/RPi/RF24" at the end and I get the same error.

I've read everything ever found by Google on this error and I can't solve it. Can anyone give me a hint? The compile command is the one thing not present in this tutorial, and apparently I needed it!

Thanks

RE: Raspberry Pi 2 : GPIO usage (with nRF24L01+, Arduino)

bmishra4 — Sun, 18 Oct 2015 15:00:49 GMT

Thanks a lot for pointing me in the right direction, it was a great help.

I was trying to achieve this from almost a week, your tutorial perfect match for a newbie like me.

Kindly let me know how can i compile my new programs written in CPP, i am very new to RPi world.

Thanks

Brij

RE: Raspberry Pi 2 : GPIO usage (with nRF24L01+, Arduino)

Former Member — Tue, 18 Aug 2015 06:06:11 GMT

Hi,

I am planning to use Raspberrypi2 for making a hardware. I am using Rpi2 as the processing part. I need 27 pins to be interfaced. I see that there are 17 gpio pins on the J8 header.

My question is can I use spi and i2c pins as input/output pins? Also the reserved pins can be used for i/o?

Regards,

Hidayat

RE: Raspberry Pi 2 : GPIO usage (with nRF24L01+, Arduino)

johnbeetem — Fri, 26 Jun 2015 20:45:23 GMT

Thank you very much for this 'blog. Enabling SPI changed from RasPi Model B with Raspbian 2014-09-09 to RasPi 2 with Raspbian 2015-02-16. Thanks to your instructions, I was able to get SPI enabled quickly and easily using "sudo raspi-config". You saved me a lot of time!

RE: Raspberry Pi 2 : GPIO usage (with nRF24L01+, Arduino)

balearicdynamics — Thu, 04 Jun 2015 13:44:08 GMT

Many thanks !!! [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-cb99d989-47cb-4481-8cdf-9e09b125904d/contentimage_5F00_3708.png:16:16]

Another great helpful page

Enrico

RE: Raspberry Pi 2 : GPIO usage (with nRF24L01+, Arduino)

Former Member — Thu, 04 Jun 2015 08:21:12 GMT

FINALLY !!! Many thanks for this Article. It all worked first time THANKYOU THANKYOU THANKYOU !!! I have been pulling out my hair with other NRF24L01 library hacks etc ......

BRILLIANT

I am inspired to try out the Network and Mesh stuff now ....

RE: Raspberry Pi 2 : GPIO usage (with nRF24L01+, Arduino)

Former Member — Tue, 07 Apr 2015 19:19:48 GMT

Johan,

I enjoyed reading this post. A couple of questions:

Where would you have inserted a bit more error detection + recovery for an application requiring no direct monitoring? It seems that the initialization code (E.g. Arduino setup()) assumes that everything is okay.
If you simply wanted peer to peer communications, it probably would have been simpler to write a TCP or UDP socket pair of applications. So, was this a warm-up (proof of concept) for a future project?

Thanks ... Richard