Tutorial - How to set up simple home automation system - Part VIII

Connecting The RF24 Modules

"A highly integrated, ultra low power 2Mbps RF transceiver for the 2.4GHz band"

On this page

• The nRF24L01+ Pins
• Connect to Arduino
• Connect to Raspberry Pi
• The Result

The nRF24L01+ Pins

The nRF24L01+ has 8 pins, and we'll use 7 of them (we don't need IRQ). You can find the right orientation by looking for the ground pin which is marked in its own little square.

Connect to Arduino

With Male-to-Female Dupont wires, you'll connect 7 wires using the mapping in the table below. The Arduino has multiple GND pins - it doesn't matter which you use.

nRF24L01+	Arduino (Uno, Nano)
GND	GND
VCC	3.3V
CE	D7
CSN	D8
SCK	D13
MOSI	D11
MISO	D12
IRQ	-

Connect to Raspberry Pi

With Female-to-Female Dupont wires, you'll connect 7 wires using the mapping in the table below. Your Pi might come with a pin layout sheet. If not, here's a very good one that works for both the B and B+ and includes a PDF you can print for easy reference.

nRF24L01+	Raspberry Pi (B/B+)
GND	GND
VCC	3.3V (17)
CE	GPIO22 (15)
CSN	GPIO8 (24)
SCK	SCKL (23)
MOSI	MOSI (19)
MISO	MISO (21)
IRQ	-

The Result

When you're done, your setup will look similar to this:

I think one of the wires is in the wrong Arduino pin in this picture...