Arduino & CC3000 Wifi & NRF24L01+ over SPI

[jesse]

Anyone know how to connect two SPI devices to an Arduino Uno?

Separately, the CC3000 Wifi module and NRF24L01+ work normally.

However, if I wire them in parallel, like for i2c, only the CC3000 works.

Is there some type of input-output connection for one master and multiple slaves?

[jesse]

I found the solution on this page: http://mathertel.blogspot.com/2013/04/using-spi-bus-with-ethernet-sd-card-and.html

The key is setting the Chip Select (CS) line to be different for each module.

For the CC3000...
"#define ADAFRUIT_CC3000_CS 7"
Pin 7 is being used exclusively to select the Wifi module.
https://learn.adafruit.com/adafruit-cc3000-wifi/cc3000-breakout

For the NRF24L01+...
"RF24 radio(9,10);"
Pin 9 is being used for Chip Enable (CE) and Pin 10 is Chip Select (CS).
http://arduino-info.wikispaces.com/Nrf24L01-2.4GHz-HowTo
http://maniacbug.github.io/RF24/classRF24.html

The other SPI pins: CLK, MISO, MOSI, are shared by the two modules and get wired in parallel.

[gregl]

Goood stuff! What is it your making?
Is it a spark core??

[ToSa]

or a WLAN Gateway

[epierre]

@jesse I did that on my Mega too

[jesse]

@gregl said:

Goood stuff! What is it your making?
Is it a spark core??

A Wifi bridge so I can use $1 NRF24L01+ modules to send data to my database or to the internet.

[barduino]

@jesse

I have a similar problem.

I dont have the CC3000 breakboard I have the shield so changing pin address for this board is not going to work.

Instead I've changed the NRF24l01+ to use pins CE 35, CS 34.
I've also changed the init of the gateway to use pins 40,41,42 for the leds.

(I'm using a mega btw)

So just using the MySensors skecth it works fine.

But as soon as I initialise the CC3000, the gw.begin() doesnt work anymore.

Were you able to get this to work?

Did you have to change any libraries?

Cheers

[flopp]

@jesse said:

I found the solution on this page: http://mathertel.blogspot.com/2013/04/using-spi-bus-with-ethernet-sd-card-and.html

The key is setting the Chip Select (CS) line to be different for each module.

For the CC3000...
"#define ADAFRUIT_CC3000_CS 7"
Pin 7 is being used exclusively to select the Wifi module.
https://learn.adafruit.com/adafruit-cc3000-wifi/cc3000-breakout

For the NRF24L01+...
"RF24 radio(9,10);"
Pin 9 is being used for Chip Enable (CE) and Pin 10 is Chip Select (CS).
http://arduino-info.wikispaces.com/Nrf24L01-2.4GHz-HowTo
http://maniacbug.github.io/RF24/classRF24.html

The other SPI pins: CLK, MISO, MOSI, are shared by the two modules and get wired in parallel.

Hi do you still have a Gateway code when using CC3000 and arduino Mega or UNO(if it fits)?