Review - SharkRF openSPOT

Review - SharkRF openSPOT

OK, so what is a hotspot?

A hotspot an interface that allows you to connect to a digital network directly without the need of an actual repeater. There are several variations of hotspots available. Some may require your PC or Raspberry Pi interface, but the SharkRF openSPOT is a small stand alone IP gateway that connects directly to your internet router via the Ethernet connection. No other equipment required.

The openSPOT was developed by two hams that not only understand what hams want, need, and enjoy, but know how to make it work with minimal setup. With features not found in other hotspots, the bottom line is, they did it right.

openspot01So, here's my take on openSPOT.



What's In the Box

-   The SharkRF openSPOT
-   120-240V / 5V 1A  wall supply
-   USB / micro USB power cable
-   Small UHF antenna (SMA-Male)
-   39? (1m)  Ethernet cable

Chassis Size: 2.75 x 2.5 x 1.0?
(71 x 67 x 25mm)
Weight:  5oz  (150g)
 
Enclosure

To start, the openSPOT is a very solidly built unit.  Don't let the size fool you.  The chassis size is only 2.5 x 2.75 x 1.0?, but the weight is 5oz.  This is due to the weighted base plate inside the enclosure to stabilize it when the cables are connected.  There is no heat build up inside, which allows me to run mine 24/7. The antenna jack is a standard SMA-F, with the antenna terminating with an SMA-Male. Four small rubber feet assist in keeping the chassis stable.
openspot02

The Manual

The openSPOT manual never goes out of date because it's web based. The instructions and tutorials include both graphics and videos to guide you through the entire setup. As new features are added, the manual is updated online, so it's never out of date.

Setup and Interface

To set up the openSPOT, I connected it to the USB power source and my WiFi router using the supplied Ethernet cable. The openSPOT has two internal micro-controllers, designed to use a web based interface. Once connected to my WiFi router, the openSPOT was accessed by simply logging into //openspot.local.  I didn't need to load any additional software or drivers. Everything is self contained.

At that point, all that was necessary was to enter:
-  The operating mode (DMR, C4FM, D-Star)
-  My callsign
-  My DMR ID (available from DMR-MARC)
-  The desired server
-  The input and output frequency of my handheld
Note: The openSPOT allows you to select two different frequencies if desired.
After that, a 30 second calibration, and I was on the air.
The LEDs give a clear status indication during operation.

Once configured, time slot, trunk group, etc. information is controlled by your handheld. You set it, and forget it.
openspot-frontback
Cross Mode Operation

The openSPOT has cross mode capability, allowing a DMR transceiver to access C4FM, as well as  C4FM access to DMR.  This allows you to operate both modes with one handheld. I personally haven't ventured into the cross mode operation, but understand it works perfectly.

OTA Audio Quality

This is where the openSPOT excels. In the past few months, I have learned to identify some hotspots by their robotic audio, much like R2D2 and BB8.  I can honestly say that I have never heard  an openSPOT with less than perfect audio. My reports have been nothing short of excellent.  I use mine on a daily basis, and have had absolutely no issues.

Firmware Updates

The openSPOT firmware is totally upgradable.  Periodically, SharkRF will post FW Beta versions on their site, however my personal preference is to wait until a final version is posted.  I do, however, like to review what is included in the beta versions to get a glimpse into the future. The developers are constantly keeping up with network changes so you always have the latest version.

Resetting the openSPOT

Part of the FW upgrade procedure requires pressing the tiny reset switch on the back pushpinwhile plugging in the USB cable. To assist with this procedure I fabricated a reset button. It consists of a small Push Pin with the pin cut to approximately 1/8? (3mm). I rounded the tip with a file to prevent damaging the internal switch. It makes pushing reset a one hand operation.

by John `Miklor'sharkopen-200
K3NXU
https://hamgear.wordpress.com/2016/12/17/review-sharkrf-openspot/



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Digital Ham Radio / Amateur Radio
https://groups.io/g/DigitalHamRADIO

SharkRF openSPOT
https://groups.io/g/OpenSPOT
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