LimeSDR: Flexible, Next-generation, Open Source Software Defined Radio

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Jun

09

RC Mains Switch and Dual System Examples

While it’s great that you can use LimeSDR with new wireless systems such as Bluetooth Low Energy, along with wideband ones such as HDTV broadcast, there are tons of applications that use really simple narrowband wireless systems for remote control and sensing. Examples of which include wireless thermostats, garage door openers and remote control (RC) mains switches.

In a new video I show how it’s possible to use LimeSDR with another Pothos example that was put together by Josh, to control an off-the- shelf RC mains switch. These tend to use a proprietary protocol for which there is no publicly available documentation, and what’s particularly cool is that Josh was able to use his LimeSDR to capture the signal transmitted by the remote, extract the codes from this and then use them to create a new Pothos block that can be integrated into applications.

RC mains switch control with LimeSDR and Pothos

If we then combine the work done for this with the previous Pothos example that implemented a Bluetooth Low Energy receiver, we can create an application that takes the reading from a BLE temperature sensor and uses it to decide whether to turn an RC mains switch on or off.

Using LimeSDR for Bluetooth Low Energy receive integrated with RC mains switch control

So here we have two completely different wireless systems, operating on completely different bands — 2.4GHz and 433MHz! — and supported by the same, common hardware platform. What’s more, LimeSDR could support at least another two at the same time given that it is 2x2 MIMO. And if we had multiple different systems all operating within the same band, e.g. numerous 433MHz home automation platforms, it may even be possible to support them all while using just a single channel of the LimeSDR (system channel bandwidth and spacing permitting).

Andrew and the LimeSDR Team

You can find the source code for the examples on GitHub.

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$10

Support Us

Support the campaign and get app development news first! We will add you to a list to be the first to find out what the LimeSDR community is doing, and what's being developed.


$289

LimeSDR

The LimeSDR is based on Lime Microsystem’s latest generation of field programmable RF transceiver technology, combined with FPGA and microcontroller chipsets. These connect to a computer via USB3. LimeSDR then delivers the wireless data and the CPU provides the computing power required to process the incoming signals, and to generate the data to be transmitted by the LimeSDR to all other devices.


$99

Acrylic Case

A layered acrylic case to protect your LimeSDR. Can be used with either USB Type A or micro USB Type B. Antenna not included - separate purchase available.


$599

LimeSDR with Aluminum Kit

Start developing apps based on Lime Microsystem’s latest generation of field programmable RF transceiver technology. This board comes with fancy aluminum casing. The board will be delivered with turnkey support for a diverse range of SDR ecosystem software, a powerful API and rapid prototyping environment. All the boards in this category will come with a fancy Aluminum casing coated with high quality material, cables, and antennas for a quick set up.


$799

Ultimate LimeSDR With PCle Interface

Start developing apps based on Lime Microsystem’s latest generation of field programmable RF transceiver technology. The board will be delivered with turnkey support for a diverse range of SDR ecosystem software, a powerful API and rapid prototyping environment. All the boards in this category will come with a PCIe interface, cables and Antennas for a quick set up. Stretch goal: if 30 units are sold, all pledges for this level will include dual-channel PA and LNA modules, together with a set of eight SAW filters covering TX and RX on bands I, II, V and VII. See updates for more details.


$85

Four Antenna + Cable Pairs

Omni-directional antenna set, covering frequency range from 800-960 / 1710-2170/ 2400-2700MHz.


$15,000

Enterprise 10 Pack - LimeSDR + Aluminum + Accessories

This package comes with 10 customized high quality enclosures with logo of the sponsor enterprise. The bundle comes with a complete suite of software and set of accessories for an out of the box experience. The package includes a one day training course at the headquarters of Lime Micro in Guildford, England or other designated locations for an extra fee to be agreed with the sponsor organization (not including airfare). On completion of the course, the participants are presented with a certificate following a practical exam in setting up the LimeSDR for one of the use cases presented in the updates during the campaign. The maximum number of attendees will be 10.


$99,000

100 Pack - LimeSDR + Aluminum + Accessories

This package comes with 100 customized high quality enclosures with logo of the sponsor organization. The bundle comes with a complete suite of software and set of accessories for an out of the box experience. The offering will include a support package provided directly from Lime Micro.

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Credits

Lime Microsystems

Working toward the democratization of wireless communication through an open source ideology.


Jessica Gillingham

Ebrahim Bushehri

Andrew Back

Zack Tamosevicius

Richard Jonaitis

Josh Blum

Lexi Hatziharalambous

Karolis Kiela

Andy Chang

Ernie Shih

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