Magic Mote MSP430G2553 wireless sensor node with NRF24L01+ module

Tom from Magic Smoke writes: This is my first time designing a PCB for MSP430. I really like the NRF24L01+ booster pack but I would like something smaller to use for remote temperature sensors. With that in mind I’ve designed a 24.5 x 50 mm PCB (2 on a 5×5 cm prototype) featuring MSP430G2553 and […]

nRF24L01+ 2.4 GHz wireless connectivity with the tinyK20 board

Erich Styger writes: I’m using the tiny and inexpensive Nordic Semiconductor nRF24L01+ transceiver (see “Tutorial: Nordic Semiconductor nRF24L01+ with the Freescale FRDM-K64F Board“) in many projects: it costs less than $3 and allows me to communicate with a proprietary 2.4GHz protocol in a low power way (see “IoT: FreeRTOS Down to the Micro Amps“). I have […]

KeySweeper – covert Microsoft wireless keyboard sniffer using Arduino and nRF24L01+

Samy Kamkar has written an article detailing the build of his KeySweeper project: KeySweeper is a stealthy Arduino-based device, camouflaged as a functioning USB wall charger, that wirelessly and passively sniffs, decrypts, logs and reports back (over GSM) all keystrokes from any Microsoft wireless keyboard in the vicinity. All keystrokes are logged online and locally. SMS alerts […]

Sniffing and decoding NRF24L01+ and bluetooth LE packets for under $30

Omri writes: In this long post I am going to describe my journey to sniff and decode popular digital wireless protocols off the air for very cheap. So cheap practicality anyone can obtain the equipment quickly. I was able to decode NRF24L01+ and Bluetooth Low Energy protocols using RTL-SDR. As far as I can see, […]

Portable library for cheapie nrf24L01+ wireless module

Kehribar released a C-based portable nrf24L01+ library on GitHub: I tried to make this library as portable as possible therefore, in order to use this library, you only need to define couple of GPIO functions in your project and that’s it! Moreover, this library supports auto-retransmission and auto-ack features of the nrf24L01+ modules. nrf24L01+ modules […]

App note: nRF24L01+ 2.4GHz wireless transceiver

The nRF24L01+ ICs are 2.4GHz transceivers that only need a few external parts. They’re controlled by a simple SPI protocol, and two extra pins. The IRQ pin signals when data is available and can be used to wake a microconroller with an interrupt.  The CE pin is an input activates/deactivates the transceiver. 126 channels are […]

MSPism V2 RF transceiver + MSP430 update

Brian updated his MSPism RF transceiver design to version 2. He added a dual output low-drop-out voltage regulator and a LiIon battery jack. MSPism is a X-Bee compatible RF transceiver with an onboard MSP430 microcontroller, using a cheap Nordic nRF24L01+ module.  The firmware is currently under development. Via the forum.