nRF905 Wireless Transceiver

The Nordic nRF905 is a highly integrated, low power, multiband RF transceiver IC for the 433/868/915MHz bands. See Nordic's site for more information.

The NRF905 (About Modules) module provides functions that allow you to easily send and receive data.

You can wire this up as follows:

NRF905	Espruino	Type
1 (VCC)	3.3	3.3v
2 (CE)	A7	GPIO out
3 (UCK)	unused	CLK
4 (AM)	unused	Address Match
5 (MISO)	B14	SPI MISO
6 (SCK)	B13	SPI SCK
7 (GND)	GND	GND
8 (TxEN)	A6	GPIO out
9 (PWR)	3.3	3.3v
10 (CD)	unused	Carrier Detect
11 (DR)	B1	GPIO in
12 (MOSI)	B15	SPI MOSI
13 (CSN)	B10	GPIO out
14 (GND)	GND	GND

How to use module:

var DR=B1;
var CSN=B10;
var TXEN=A6; //also seen as TX_EN or TXE
var CE=A7; //also seen as TRX_EN

function RX_callback(data){
  console.log("Got "+JSON.stringify(data));
}

SPI2.setup({sck:B13, miso:B14, mosi:B15 });
var NRF = require("NRF905").connect(SPI2, CSN, DR, TXEN, CE);

// Init both the module RX address and the RX callback
NRF.init(0x17, RX_callback);

// Send a packet: requires the TX address and a byte array, up to 32 bytes
NRF.send(0x17,['H','e','l','l','o']);

This module could do with a bit more documentation - if you can, please click here to help improve it.

DataSheet

• sparkfun.com

Buying

• ebay.com