sending I2S signal through NRF24l01

[VineeshMohan]

Hi,

I am using NRF24L01 module and I would like to transmit I2S signal through this module. I used SGTL 5000 audio shield for converting audio signal from microphone to I2S format and the micro controller used is teensy 3.6. but while transmitting the I2S signal through NRF module,  I am not getting any signal at the receiver side.

So I request you to kindly provide a solution for he same.

[Kenneth]

I first recommend to check out the application note that show how to setup the nRF24L01 in different ShockBurst modes:

http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.appnotes/dita/appnotes/pdflinks/nan_24-12.html?cp=10_14 

Then you will make sure the hardware is working as intended before starting to convert the I2S audio data into SPI data packets to be transmitted.

Are you sure you are using nRF24L01 here? And not the nRF2460 which have a I2S interface?

[VineeshMohan]

Hi Sir,

We are using NRF24L01 module. We already sent 32 bit data(Not Audio) through this NRF module.

THe module settings are

Data rate: 2 Mbps

And for sending the audio signal, the process which we followed is given below

1) Using SGTL5000 audio shield the input from the microphone is converted to I2S data.

packet size: 32 bit data, Fs: 48Khz

2) The SGTL 5000 is interfaced with teensy 3.6 micro controller through I2S BUS

3)The teensy 3.6 is interfaced with NRF24L01 through SPI Interface.

4) The 32 bit I2S data is directly given to NRF24L01.

Data rate : 2mbps

By setting like this, it seems like some garbage values are receiving at receiver side.

[Kenneth]

So I assume the problem here is that sometimes the data is garbage? 

If yes, then you should check the length of address field and length of CRC. Typically using 5byte address and 2byte CRC is the most robust, but still it may not be enough to handle all error conditions. So you may consider add some additional error check in the packet itself.