As part of these stats, his system automatically complies a list of DMR users and their details — ID number and name: here. These are users who actually are on air and using the network — not just those who hold a DMR ID number. The data is presented as an excel spreadsheet — which can be downloaded into many of the Chinese DMR radios. This ID number is sent with every transmission. VK usesthe UK usesetc. The complete DMR number database is available for download at the radioid.
The shortcoming of this arrangement is that it requires a user to download or type… the contact list into their radio. The list changes quite often, so a new list must be downloaded every few weeks or so.
The international DMR standard has a feature called inband caller alias. This allows all radios to transmit a user-defined text string of up to 31 characters with every call — for amateur use, this would obviously be callsign and name. However, like some DMR add-ons, it may not be backward compatible and may not be supported by our server infrastructure. The ergonomics were the best I have ever used — it fitted your hand beautifully.
There was a software incompatibility that meant the radio dropped receive audio after about seconds. The problem was eventually fixed with a firmware update, but it was very annoying at the time…. So, I migrated to the big M.
Of course, their portables and mobiles work perfectly with their repeaters, as you would expect. The Motorola radios are commercial land mobile products designed for a non-technical user.
From an amateur perspective, they are expensive, you must load contacts manually i. You grit your teeth and put up with the inconvenience, because the RF performance, the build quality and the reliability are first rate. The Chinese radios are a lot more flexible for amateur DMR — you can load contacts directly into some radios via an excel spreadsheet, and many offer keypad programming. However, the build quality is very variable, and the programming software is often buggy and finnicky drivers can be a nightmare and anti-virus programs often block the programming software.
The Chinese radios will also sometimes crash and lock up. Some radio displays are small and difficult to read, the operating routines can be illogical, and the operating manual is often not written by a native English speaker. After some discussion, I purchased one.
TYT MD-UV380/390 advanced hotspot codeplug
Tim was right — it is a great little radio. It bridges the gap between the high and low end radios, by offering the best of both. The TP3 is a commercial quality, type approved land mobile radio.Hotspots are not new to the digital world.
DV Mega has been selling hotspots for D-Star for a long time. Hotspots have evolved just the same as the networks and radios. There are quite a large number of units available now supported by a few variants of software. The majority of hotspots are simplex and on UHF.
There are also a few portable units with built in batteries and some duplex units. Software is written by amateurs so please support them and understand that they are doing this free of charge for their fellow amateur radio enthusiasts.
There are also alternative options than a hotspot and radio which allows users to access the DMR network via a bit of hardware and a computer or some software running on various platforms.
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Necessary Necessary. Non-necessary Non-necessary.At a high level, there is not much to configure; Frequency, Color code, Network master IP and config if there is one and maybe a couple personalized settings.
A DMR Master device is where the logic and smarts are housed. If you need any special settings changed for your MMDVM DMR repeater like the callsign, its location, or static talkgroup settings, you do so on Brandmeister because its the master. This is where DMR Gateway comes into play. All you as a user have to do is change the channel on your radio and talk. As a programming example, Channel 1 can be one of your favorite Talkgroups on Brandmeister while channel 2 is your favorite XLX reflector.
This helps make it easy to never miss anything on your favorite TG or network. So when TG 6 has traffic all repeaters connected will also have the same traffic.
If you have a bunch of local regional DMR repeaters, this is a great use to cluster them together with your own infrastructure. This example is not much different from the last example. The main difference is the XLX reflector is setup as a private reflector not advertised or accessible without manually editing inbound host files on their pi-star devices.
Most admins will spin up a cloud server or use a spare computer hosted locally for installing and running XLX. Fortunately there are ways to combat this argument. For a relatively low cost and ease of installation, all without requiring internet, expensive combiner equipmentat a single high profile site, all digital modes can talk together. This would mean:. This method does have its draw backs. These are just a few examples of how you can incorporate the DMR Gateway feature into your daily digital voice routine.
Its another valuable tool for the digital voice world. DMR was created with the intent of linking repeaters together via any means possible. The ham radio home brew scene is taking off and taking full advantage of these features and abilities. I program TG6 into a channel for all my devices and have a constant connection with the flip of a channel.
Search for: Search. A Single tower site that transcodes all digital voice modes Most admins will spin up a cloud server or use a spare computer hosted locally for installing and running XLX.From time to time I get asked about the best frequencies for use with Hotspots. I decided to dig into this get some answers.
They gave me two frequencies, If you have a duplex hotspot you can use one of the test pairs Be aware, there are lots of repeaters in SoCal using these frequencies.
If you are not in Southern California you should check with your local frequency coordination group as this will probably be different for you. For example, I looked at Arizona and found We have the same issue in Nevada they do not coordinate simplex frequencies.Pi-Star / DMR Complete Tutorial Hotspot Programming
Here in Vegas we have an issue with some putting up All Star nodes on simplex but having an antenna on a 50 foot tower. He has been reported but nothing gets done. Are you talking about the frequency? If you are in Southern California, the frequencies mentioned in the article are probably the best choices. In Arizona, as per the Arizona Band Plan — A good place to put your hot spot. Do not use As there is no national organization for frequency coordination groups and the ARRL refuses to address the situation, I did something about it.
Hope it helps. Updates welcome. There are no ATV repeaters in my section or adjacent sections, nor did I find any for hundreds of miles. Your email address will not be published. Notify me of follow-up comments by email. Notify me of new posts by email.It does not require its own power supply as it is powered through the USB interface.
The software work on any Windows PC and Linux. It's also possible to use it on a tiny Raspberry Pi, this is the most complete hotspot on the market. For home brewers: the DV4mini runs well on single board computers e. Raspberry, BananaPi, Odroid etc. The minimum requirement is a Dual-Core. Such a hotspot would only need a few Watts and be useable in continuous service. That means one cannot only transfer digital voice but also data. Output Power: approx.
DV4mini and dv4mini. Runs on Windows and Linux. Driver: The driver for Windows is included, Linux does not require one. For all digital plateform. The site below confirms your registration. You cannot just enter your call sign in the DV4mini software, you must enter the DMR unique ID, this will give you access to all the reflectors and all modes.
Make sure your Windows Firewall does not block the Internet access to the software, otherwise no need to make any port forwarding. Introduction Laboenligne. The image include a VNC software that will run automatically after installation. Insert the microSD in your computer. Open the downloaded image and slick Write. It will take a few minutes, please be patient. If you need to access outside your Network, you will need a port forwarding to TCP on your router or firewall.
Choose your frequency, mode, reflector and have fun!Konde boy
Changing your root password is easy, you can use Putty software in SSH or select the terminal icon when in remote.Note that on the 2m and 70cm lists, I have replaced the FM calling channel frequency with the DV calling channel frequency, still utilising the FM channel name prefixed with D. Channel naming can be rather messy as some simplex users may still follow the naming convention based on the old channel spacing. Now with the channels being shared between analogue and digital users, it could become more confusing in regards to naming the channels in the code plug.
A simple method I have used is to prefix the channel name with A or D to differentiate between an analogue and digital channel. An example : Note: in the earlier days of DMR there were unofficial 2m and 70cm used for simplex. I have included these however users are urged to move over to the official allocation to prevent any potential interferance and align themselves with the correct channels.
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You also have the option to opt-out of these cookies. But opting out of some of these cookies may have an effect on your browsing experience. Necessary Necessary.I have the bottom of the case designed with the mounting holes for the Pi.
Here is a top view of the bottom part of the case. Here is a top view at an angle. I did make the holes slightly smaller to allow screws to bite into the plastic. I enabled DMR last week and spent some time configuring it. This week I had to set the DMR transmit deviation in order to get it to work. I used a service monitor and checked the deviation level while the repeater was transmitting.
This adjusted the deviation for just DMR, leaving the deviation alone for all other modes. Problem 1 was solved by recompiling the Nextion Driver and reinstalling it by hand. I thought this was caused by the enterprise WiFi at my university. I did add a button to restart the WiFi from the Nextion display.
It is two simple commands. Again it had to do with the time the Pi takes to authenticate with the WiFi. I found that if I wait about a minute or two after the display shows the IP address, then go to the displayed IP address in a web browser, the PiStar dashboard appears as it should.
The two devices will communicate with one another given enough time. The reason for this is that when you configure from the main tab and click apply changes, you can lose settings you set in the expert MMDVMHost page. After trying out the Nextion Driver Installer created by ON7LDS, I could get the screen to display information one time, but after switching pages, the data would disappear. To solve this problem, I looked at the Nextion Driver Installer script and followed most of the steps manually.Wow classic boss armor
Doing it this way also allowed me to switch the displayed CPU temperature from celsius to Fahrenheit. This pretty much solved the issues with the display.Mbwa wangu anatosha 4
Sometimes the repeater starts right up and works perfectly and other times it does not work. Again sometimes I had no issues and other times it would not connect. At first I thought this was due to having both the ethernet and the WiFi running on the Pi, but after removing the ethernet, I had the same issue.Simulating a pendulum
As for it not working over the crossover cable, I believe this is due to the fact that the computer is addressing itself with a self-assigned IP address a address. The problem appears intermittent. I also wanted to create a 3D printed case for this project, however I am not sure I will have enough time to do that, especially with encountering these problems. So I adjusted the TX offset to and retested the transmit frequency. It appears to be getting closer, showing a frequency of about I set the RX offset equal to the TX offset and that brought the bit error rate down to 0.
I need to work on this a little bit more to solve that problem. I was testing with a layout from another ham that displays a lot of information and I think the screen has trouble keeping up with the amount of data.
I will detail this process in my next post. Follow the steps below to do that. What I purchased is a cheaper clone, but it should work about the same as it uses the same firmware.
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