SharkRF

High quality wireless communications equipment

Learn more about the openSPOT3

More information about the

The openSPOT3 is a battery powered, portable, standalone digital radio internet gateway (hotspot) designed mainly for amateur radio. You can talk with others on digital radio networks by using an openSPOT3, Wi-Fi internet access, and your digital transceiver.


The openSPOT3 is now available in our shop.

Compatible digital radio protocols and networks

  • DMR (BrandMeister, DMRplus, DMR-MARC, Phoenix, XLX, TGIF)
  • D-STAR® (DCS, REF/DPlus, XRF/DExtra, XLX)
  • System Fusion®/C4FM (FCS, YSFReflector)
  • NXDN® (NXDNReflector)
  • P25 (P25Reflector)
  • POCSAG (DAPNET)
  • APRS® messaging and location data forwarding (APRS-IS)

Supports cross modes with built-in hardware transcoding (example: talk with your D-STAR® radio on DMR, and with your DMR radio on D-STAR® networks).

See the product specifications here.

Key features

  • Built-in Li-ion battery with up to 10 hours of operation (can be extended with additional power saving)
  • Built-in hardware transcoding* for the best voice quality in cross mode operation
  • Built-in extended range Wi-Fi and radio antenna
  • Built-in beeper with audible status tones
  • Web-based easy and fast Quick Setup
  • Call audio playback on the web interface
  • No additional hardware required, works out of the box without a computer
  • All accessories included you need to have the openSPOT3 up and running (USB-C cable and 120V/230V USB power supply for charging)
  • Designed for 24/7 continuous use even in your vehicle with extreme fast bootup and USB power supply tolerance
  • User manual available online
  • 2 year warranty** with official support in email / community forum
  • Web interface for configuration and monitoring
  • HTTP/WebSocket API with documentation for developers
  • Create your own private radio network using our open source server application

* The list of cross modes which are using the hardware transcoder can be found here.
** The internal battery has one year long warranty period.

State of the art hardware and software design

  • The openSPOT3 is the only complete hotspot on the market which is:

    • customly designed as a fully dedicated device for standalone operation (no Raspberry Pi® or anything like that is used or needed)
    • has a built-in battery
    • has a built-in hardware transcoder, and supports D-STAR® cross mode operation
    • using a fully embedded software written in pure C, running on an embedded real time operating system. This means no Linux, no bulky Windows software, no failing SD cards – but extreme durability, reliable operation and fast bootup.
  • No desktop PC software or drivers to install
  • Supports fast battery charging with USB charger detection
  • 20mW UHF RF output, see the specifications
  • Extreme fast bootup: under 5 seconds* from powerup to connected to BrandMeister and ready to use
  • Supports scheduling an automatic daily wakeup and powerdown
  • Built-in Wi-Fi access point mode for quick and easy connecting to Wi-Fi networks
  • Multiple Wi-Fi network support with automatic connect and reconnect
  • Fully automatic over the air firmware upgrades for new features
  • HTTP/WebSocket API with documentation for developers
  • Bright multicolor LEDs with brightness control for easy real time state and battery charge status monitoring

* Depends on the speed of the Wi-Fi router, Wi-Fi network and internet connection conditions.

Very easy to use

  • Built-in voice announcements
  • BrandMeister Manager and Quick Call on the web interface for DMR TG/reflector linking/unlinking
  • DMR SMS chat
  • DMR ID database lookup
  • Controllable with calls from your radio to preconfigured IDs/callsigns
  • Built-in echo service for testing

Frequently asked questions

What’s openSPOT3 good for?
Let’s say you live in Budapest, and talk to your friends on the local DMR repeater HG5RUC, which is linked to talkgroup ID 216 (TG216) on the BrandMeister network.

If you travel around the world, where you can’t reach the repeater HG5RUC directly, you can still talk with your friends by using an openSPOT3 and a DMR (or cross mode compatible) radio by connecting it to the same network and talkgroup which HG5RUC uses (TG216, BM). If you speak with your radio on the openSPOT3’s frequency, it will route your call to TG216, and HG5RUC will transmit your signals all around Budapest, so your friends will be able to hear and talk to you.

If you don’t have local repeater coverage, the openSPOT3 can link you to supported digital networks all around the world. You can talk to people living on the other side of the world very easily.

What if I already have local repeater coverage?
If you do have local repeater coverage, you can still make use of an openSPOT3 to avoid interrupting local repeater traffic. You can reach any reflector or talkgroup with it, so you don’t have to disconnect the local repeater and disturb other local users.
What makes openSPOT3 way better than any hotspot currently on the market?
Currently the openSPOT3 is the only hotspot on the market which is customly designed as a dedicated hardware unit for standalone operation. It does not need a computer, a Raspberry Pi®, an Arduino® board, SD card or any other hardware to operate. It doesn’t need slow desktop PC software or drivers to install. No Linux knowledge is needed at all. It has a built-in battery and supports hardware transcoding for the best voice quality.

The openSPOT3 is designed by hardware and embedded software professionals, who are also amateur radio enthusiasts. It’s PCB, hardware components and case are very high quality, meet industrial standards and were chosen with practicality and durability in mind. We offer 2 year warranty* with official support in email and on our community forums.

The openSPOT3 is not an MMDVM® clone, it has nothing to do with MMDVM® or Pi-Star, and it’s not a Raspberry Pi® wired with a bunch of PCBs in a case (or without a case…).

Using the device is extremely easy. You can change the openSPOT3’s every setting by opening it’s built-in web interface with a web browser. You can also use the Quick Setup feature to easily connect the openSPOT3 to a digital network like BrandMeister. Opening the web interface is rarely needed, as you can switch talkgroups, reflectors, and even pre-saved configuration profiles by using your radio.

Even the first time setup is very easy. If no Wi-Fi networks are configured, then the openSPOT3 appears as a Wi-Fi network access point on your phone/tablet/PC called “openSPOT3 AP”. Connect to this network, and a connection wizard helps you to connect the openSPOT3 to the available Wi-Fi networks.

* The internal battery has one year long warranty period.

Is it available as a kit or does it come preassembled?
The openSPOT3 is a ready to use product in a box with all the needed accessories like any other product you can buy from the store shelves in your local electronic department store.
How much does it cost?
You can find the price in our shop. Note that the openSPOT3 has all accessories included and ready to use with your digital radio.
What about warranty and support?
We offer 2 year warranty* with official support in email and on our community forums. We respond to all emails very quickly. openSPOT3 has a detailed user manual which will be available online before the product sales begin. We’ll have tutorial videos on our YouTube channel. We also have a Facebook page, and a Twitter channel with the latest news.

* The internal battery has one year long warranty period.

How do you ship the unit?
We ship with DHL Express with tracking. Orders of products in stock are shipped with delivery times of 1-6 business days even to the most remote parts of the world. Shipping to EU usually takes 1, shipping to the US usually takes 2 business days. You’ll receive your order’s tracking number in an automatic email when the courier service picks up the package. The power plug you’ll be able to use in your country will be included in the box.
What’s the shipping cost?
You’ll get the exact shipping cost after registering in our shop with the delivery address and do the checkout.
Where can I find the product specifications?
Specifications are available in the user manual.
What happens if I move between multiple Wi-Fi networks?
The openSPOT3 automatically reconnects if the connection is dropped. You can set up multiple Wi-Fi networks to connect to, so it’s very easy to set it up for your home, vehicle, and work Wi-Fi networks. The device will automatically connect if one of the configured Wi-Fi networks become available.
Can two or more openSPOT3 be linked together?
Two openSPOTs can be linked together directly without any servers or network infrastructure. Interconnecting two digital radio sites can be easily done this way. You can also create your own private radio network by using our open source server application called SharkRF IP Connector Protocol Server. Multiple openSPOTs can connect to this server, it handles all radio modes, even supports cross mode operation. It also has a nice dashboard.
What is cross mode operation?
For example, the openSPOT3 can convert your DMR radio’s transmission to a D-STAR® network, and when someone talks on the D-STAR® network, you’ll be able to hear it on your DMR radio. This cross mode operation is extremely easy to set up. You can find the list of supported cross modes in the user manual here.
Are there any plans for a VHF version?
The openSPOT3 has a built-in antenna for the UHF band. Currently we don’t plan to ship a VHF (or dual band) version of the product.


The openSPOT3’s web interface has light and dark themes
Are there any plans for a DMR duplex (dual timeslot) version?
Currently we don’t plan to ship a DMR duplex version of the product.
Why doesn’t the openSPOT3 have a display?
You already have a display on your phone/tablet/computer and also probably on your transceiver which all can be used to interact with the openSPOT3. You can change all settings using the openSPOT3’s web interface, and also using your transceiver with the help of a unique feature called configuration profiles.
Does cross mode work with D-STAR®?
Yes! D-STAR® uses an older codec which is incompatible with the newer one used by DMR/System Fusion®/etc., but the openSPOT3 has built-in transcoding hardware, and it supports cross mode operation with D-STAR® radios/networks.
Will there be support for connecting to Ethernet networks?
You can connect the openSPOT3 to an Ethernet network using a Wi-Fi AP/router device.
Which Wi-Fi band is supported?
The openSPOT3 works on 2.4GHz Wi-Fi channels.
Can I use the openSPOT3 continuously plugged into the USB power supply?
Yes! There’s even a setting which you can activate and then the openSPOT3 will turn on if there is external power available, and turn off if the external power supply is disconnected. This is very useful if you want the openSPOT3 automatically turn on and off if you use it in a vehicle for example.
I’m a developer. How can I use the API?
By using openSPOT3’s API, you can develop your own software to control the device without using it’s web interface. For example, you can send and receive text messages, monitor calls, link/unlink talkgroups.
What’s the difference between openSPOT3 and previous versions?
The openSPOT3 is a whole new device with a built-in battery, hardware voice transcoding, beeper, Wi-Fi support, USB-C high tolerance power supply with fast charge support, onboard external flash memory (for fully automatic firmware upgrades, DMR ID database and other new features), built-in extended range Wi-Fi and UHF antenna, a 0.5ppm TCXO with factory calibration for very low BER.

Most of the software components were redesigned to make the whole device extreme fast, future-proof, and use very little power. We’ve added new radio modes and network protocols since the openSPOT1. The web interface is redesigned and now use WebSockets technology which means extreme low latency and a whole lot of new realtime features.

Is the openSPOT3 and previous version’s software compatible?
No. The openSPOT3 uses an entirely new architecture which is not compatible with any older models.
Will there be an Android/iPhone app?
sharkrf.link is available as an application, but it is optional, as the openSPOT3 can be configured using it’s web interface. You can open it in any supported browser even on your phone.
Can I use multiple openSPOTs on the same network?
Yes! Make sure each device’s name is unique so you’ll be able to open each one’s web interface by their unique device names. You can change the device name at the Network Settings on the web interface.
D-STAR® is a registered trademark of Icom Inc.
System Fusion® is a registered trademark of Yaesu Musen Co., Ltd.
NXDN® is a registered trademark of JVC Kenwood Corp. and Icom Inc.
APRS® is a registered trademark of Bob Bruninga, WB4APR
Raspberry Pi® is a registered trademark of Raspberry Pi Foundation
Arduino® is a registered trademark of Arduino AG
MMDVM® is a registered trademark of Shenzhen HKCNMA Co., Ltd.