Hotspot Fixing Packet Loss with AutoCal

The thing with digital communications, it can be extremely complicated. It only takes one tick box to be ticked incorrectly to take your station off the air.  Just as easily one tick box will get you on the air and sounding great.

With Analogue, it was all about antenna gain, SWA, power and height.  Digital is vastly different, especially via a hotspot, as it is all about lack of power, mic gain and packet loss.  Packet loss can be tricky and is often put down to a bad internet connection.  However, that is not always the reason, and if your internet is good, and your packet loss is above 1%, then it can get tricky to know why.

Assuming you have a good connection, you have your hotspot close to your modem if it is via wifi and your radio is also close to your hotspot, then here is something you may want to try.  I will explain how to do it using an OpenSpot, as that is what I am using, however, most hotspots may have the same or similar features.

After many years of using the same hotspot, I noticed more and more the hotspot didn’t seem to recognise my signal from my radio.  I could hear fine, and my hotspot even said it was receiving my signal, but my call didn’t come up on the dashboard and the other person couldn’t receive my signal unless it did come up on the dashboard.

It started 3 in 1 times I would trigger the hotspot like normal, then it changed to 1 in 3.  It got worse before it made the hotspot almost unusable.

My hotspot, an OpenSpot2, has a AutoCal option and will analyse an incoming signal and tries to find out the frequency difference between the OpenSpot and the transmitter. They suggest that you only run AutoCal feature if the openSPOT2 shows BER above 1% for your radio’s transmission, as errors in the voice stream usually won’t be noticeable if the BER is below 1%.

You can see this on the OpenSpot by going to the Status screen and open the BER graph and transmit. A quicker way is to look when you transmit on the dashboard of your OpenSpot, you can see below the BER is next to the B, and this example has a loss of 1.3%.

Dashboard showing BER loss.

With the Openspot, press the quick setup button, select the type of radio you are using (I am using a DMR radio), and then you can see the AutoCal button.

All you need to do is press that AutoCal button.  Then scroll down and you will see it doing the three phases. Make sure the correct modem mode is selected. Hold the PTT button on your radio until all 3 phases are completed. Once complete, you can try the echo test to check you are working well.

Then you can return to normal use and the BER should have reduced to well below 1%.

OpenSpot have more information here in their user manual.

I hope this helped you, and if you enjoyed it, here are some other posts I have done. Please don’t forget to put your email address in to make sure you get the latest posts.

OpenSpot from the Start

I have spoken to a few people who have felt a bit overwhelmed setting up their OpenSpot from the start. In saying that, I have always been surprised how many people are on digital, some of them have no computer experience at all.  It only takes one tickbox to be selected wrongly and you are off the air totally.  So clearly there are a lot of helpful Amateurs out there.  This website is my way of helping, as I can’t be all over the world to help.  I have put things of interest as I find them on my site.  If you find it interesting, please subscribe or let me know.

In saying that, OpenSpot has been setup to be as easy as possible with a lot of thought behind it.  While I am not claiming this is the best hotspot, I am saying I have two of them and found them great to use at home, mobile, and portable.

This is what I do with my openspot2.

Starting from the beginning

Plug your OpenSpot2 in

Turn your mobile phone wifi (or could use a tablet or laptop with wifi) on and connect to your openSPOT2 AP

If the popup page does not show up (it may take a while to load), type in openspot2.local in a web browser

A welcome screen will ask you to select your country

Scan or manually select your home wifi

Press connect and type in your password for your home wifi

After pressing ok, you will get a message saying this hotspot is going to connect to the wifi now instead of directly connecting to your phone

You can then connect to it via your phone or device that is connected to the home wifi.  I recommend you do this via a pc as you get more functions on screen, however you can do it via a mobile phone with a smaller screen. To connect, go to openspot2.local in a web browser.  However, if you have two openspot2’s on your network, as I do, you will need to log into your network modem and check the actual ip address of your openspot.

If you can not find it on your network, then I suggest you go back to your phone and see if you can connect to your openspot again via wifi.  If it is not there, you may need to unplug the power cord and plug it back in a minute or so later, or press the button next to the power cord until the light goes white to reset it and start again.

Once you connect via the wifi network to your Openspot for the first time you will get a Quick Setup Screen.

Put in your call sign and the DMR ID will auto populate.  You can put in your NXDN ID also.

Select the type of radio you will be using to connect to the OpenSpot.

Type in the frequency you want to use while using the Openspot.  Make sure it is a different frequency to all other hotspots so you don’t get hotspot feedback. Keep colour code as 1. Then select the network you want to connect to.

Enjoyed the read? Don’t forget to subscribe. Below are some other interesting reads:

Treehouse

An unusual name, but a catchy name no less, just like Peanut that was written by the same person, David PA7LIM. If you like Peanut, then you will like this project also. This project, like Peanut, includes some amazing coding and thinking.

Launched in 2020, the main website for Treehouse is found off David’s web site. This project is a YSF reflector with multiple rooms.

Dashboard

You can see the dashboard via this link http://europelink.pa7lim.nl/ it is a very similar layout to the Peanut one.

If you open the above dashboard, you will see down the left side in the Room Control section, a message stating your hotspot is not logged in to this reflector.

There are several ways you can connect, but here are a few in no particular order.

BlueDV

A friend of mine, Chris, put this video together. He uses BlueDV to get onto it.

YSF – via your hotspot

As I use an Openspot2, my instructions will show you how I do it, however I am sure you can apply similar to your hotspot should you have a different one.

First you need to connect to the YSF reflector called EUROPELINK, and according to the YSD reflector register, this has an ID number of 00007. If you don’t know how I found this, go to the YSF Reflector Registry page and type in EUROPELINK in the search box, and you can see the ID number of 0007.

Back to the Openspot2, I select Quick Setup, then I select DMR, as I am using a DMR radio, then select YSFReflector then in the Server box, I type in 00007 or EUROPELINK, to select that reflector. Doing this will connect my DMR radio to the YSF system.

Almost instantly, the Room Control section of the dashboard has updated to my call sign and I now have a drop-down list where I can select which room I want to connect to. You can then select the room you want.

As you transmit, you will see your call in the Active QSO’s screen.

While this is not connected to the Peanut Dashboard, there will be rooms that go across to each other. The Online Stations section of the Dashboard has the time stations connected.

There is a new AU-NZ room which is good and was quickly made after it was requested to David. Some rooms link just to themselves, like the English room and so on, while others connect beyond the internet. Remember this reflector will get busier as time goes on.

Also, this setup is still very new, and like Peanut, it took a little while to become popular.  Having said that, Peanut took off quickly and given the success of that, and a lot of people at home during the 2020 Pandemic, I believe this will take off quickly also.

Hope you enjoyed this post. Please remember to follow this blog by putting in your email address so you get posts as soon as they are posted.

Want to see other projects that are similar?

Here are some other posts we have done that are similar:

SMS via Radio or Hotspot

One of the most underutilised by very cool feature that comes with some digital networks is the ability to send and receive SMS messages. You can send it fairly easily to another radio, but did you know you can also receive a weather report, see where your last GPS transmitted location is, and send messages to your mobile phone. The best thing is there no cost either.

While not all networks and not all radio’s support sending SMS’s. Some hotspots do and some done also just to make it even more confusing. While I don’t plan to list all networks available, as they there are more all the time, and the settings change also. However, at the time of writing this (2020), the VK-DMR network does not support GPS or SMS (you must turn it off to use the system), but the BrandMeister one does. So, I will talk from here on about the BrandMeister network. If you use a different network, then check with that network first.

BrandMeister Setup

First you need to setup your BrandMeister account to send and receive SMS. From the BrandMeister page, login at the right of the screen. Then under Services on the left side, select selfcare. I usually set the radio brand to either ETSI or Motorola, however this will depend on the radio you have. While you are here, you might want to turn on or off your GPS location and check everything looks good.

Radio Setup

Would you believe most digital radios allow you to send and receive messages right from the screen easily. However not all. Unfortunately, at the time of writing this (2020), the OpenGD-77 does not support text messaging as yet. However, it is on the job list. I do understand that since text messaging isn’t the most used option in digital radio, probably leaving this setup until last is fair enough. However, I have done it on the original GD-77 firmware, and seen it done on other radio’s also.

If your fortunate enough, you may have a hotspot that can do it anyway.

Hotspot Sending

I am not going to talk about every hotspot available, mainly because I don’t own every hotspot available. But I will talk about the OpenSpot as I have a couple of them myself, and I know they work.

From a PC, the menu on the right side has DMR SMS chat that will bring up a box much like the picture below.

DMR SMS Chat in OpenSpot

262993 GPS and Weather

If you send the message help to destination ID 262993 you will get a prompt much like above. It may take a little while to reply. As I live in Melbourne, you can see above I then sent a private message to 262993 again and typed in the message wx Melbourne, AU. You can see above the message on the left I received. Remember, the reply’s do take a while to come back and usually arrive just as you have given up waiting!

You could also send the message gps help to the same number, 262993, to get an overview of all the GPS commands which includes setting your home position, and so on. If you have transmitted your GPS location with the same callsign you set up in the selfcare then it will reply with your last location sent. If you want to save that as your home location, send GPS SET and it will save your last location as your home location. Then you will get from now on your home location and your last transmitted location.

If you send RSSI to 262993 it will reply with the repeater and connected talk group you were last using. If you send a message INFO *callsign where *callsign is replaced with your call sign you will get a reply when you last spoke. If you have two digital ID numbers, then it will send both of them back to you.

262994 Repeater, POCSAG and dapnet

If you send RPT SMS to 262994 you will get a reply of what static talk groups you are currently connected to.

You can also send a message to a call sign using this 262994 number. For example, if you want to send a message to me, send VK3TBS followed by your message to number 262994. However, I couldn’t get this to work – maybe because I was messaging myself! If you get it to work, please let me know what I did wrong.

262995 SMSC – SMS-ing to a mobile phone

This is taking SMS-ing to the next level. I was even able to SMS my wife who doesn’t have a licence.

To do this, send the following message SMSGTE @[phone number] [message] to 262995. where [phone number] is your country number (e.g. 61 for Australia) followed by the mobile number. Remember to remove the first 0 if you’re in Australia.

There is more information on sending messages to and from your radio to mobile phones on the smsgte.org web site. There is heaps of information under the User Guide menu.

UPDATE – Before I finish, I discovered the hard way that when you send a message from a mobile phone to a radio, I got a bill. I am not sure if it was because I am in Australia, or my phone carrier saw the oppertunity, but I think with a few tests it was only $1 or so.

APRS Chat

APRS is almost a bit easier and can quickly send messages to and from a mobile phone. Once you have done the above setup, I selected APRS chat in my OpenSpot2 dashboard. Then I sent a message with the destination callsign of SMSGTE then the message was @[phone number] [message] there [phone number] is your country number (e.g. 61 for Australia) followed by the mobile number. Remember to remove the first 0 if you’re in Australia.

You can see in the picture below I sent a message Test from hotspot to my phone which appeared instantly. I then sent one back from my phone saying This is from my mobile phone which then appeared instantly. It worked really well.

Other Reads

Hope you enjoyed the above post. Below are some other reads I think you may also enjoy.

  • Treehouse
    An unusual name, but a catchy name no less, just like Peanut that was written by the same person, David PA7LIM. If you like Peanut, then you will like this project also. This project, like Peanut, includes some amazing coding and thinking.…
  • Software Defined Radio (SDR)
    If you don’t have one of the latest and greatest expensive scanners, you will struggle to listen to a lot of transmissions. While there is…
  • BlueDV Windows 10 GD-77
    I found it hard to find useful information on how to run the OpenGD-77 hotpot mode with Windows 10. At the time of writing this, there is a lot about this topic using a pistar and even android or ISO, but not much with Windows 10. This is my experence with BlueDV and Open GD-77 using a Windows 10 PC.…
  • Iphone won’t download photos
    I get the “Device is unreachable” Error message when trying to import media from iPhone to Windows 10 PC. …
  • ProScan and ProScan Client Update
    I recently started using ProScan after years of using FreeScan. I have always enjoyed using FreeScan as it is easy to setup, I can download outputs from the software, and the main reason “it works”. However ProScan seems to be more graphical and has different features also.…

My Radio Diddity GD-77

Starting in digital can be a little overwhelming to start with, no matter how many years you have had your licence. I even had a digital scanner for many years prior to starting in the digital world of Amateur Radio.

After working out what digital radio is, what you can do on it and how it worked, I then started researching what equipment was required.

According to other reviews at the time I was looking, many people claimed that the RadioDitty GD-77 was the best value for money.

My Radioditty GD-77 while on holidays
My Radioditty GD-77 while on holidays

After a month or so of using the RadioDitty GD-77 through repeaters, I purchased an OpenSpot2. I did a lot of research prior to this, and had settled on the OpenSpot1, however when I went to purchase it, only the OpenSpot2 details. It happened to be the week it was launched, so there were no reviews available at the time.

Currently my digital setup is very simple, it just has:

  • One hand held radio, the Radio Ditty GD-77, this came with charger, USB cable and remote microphone
  • OpenSpot2 Hotspot. This came with a power cable.

With this simple setup I am able to talk the world via

  • The BrandMeister network
  • The Australian VK-DMR network
  • Other DMR networks around the world, eg New Zealand, Canada etc
  • YSF Reflectors
  • C4FM
  • NXDN Reflectors
  • SharkRF servers

The above is just to name a few networks. Each of the above networks range from a few Talk Groups, to thousands upon thousands of them from all over the world.

In 2019, my family went for a huge five week trip through outback Australia. We went to some of the most remote parts of the world. We had to carry a lot of water, food and supplies. We also had to carry extra battery power to charge fridges etc. I would have liked to have taken a HF radio with us given the outback probably didn’t have a lot of interference, however we simply didn’t have enough room, or power.

Instead we took a very simple setup, my GD-77, my openspot2 and a small battery back that ran my openspot and mobile phone. Even without power, I was able to talk the world with a little mobile reception or wifi.

Many people have many radio’s for different networks, making it hard to keep updated, and obviously cost a lot. My digital setup costed far less than it costed me to get on 2m/70cm many years ago. And did I mention, this radio also does analogue, so yes, you can use this radio on 2m and 70cm simplex or via the repeaters and no one will know you are actually talking on a digital radio.

The only down site is it is a little hard to program and navigate the channels. The radio is built for commercial operations, and not really for amateur radio, however it can be done. Commercial operations usually have a small number of talk groups or repeaters/frequencies, where as amateur radio uses a lot. However once you nut it out, it isn’t really that hard.

Other things to read

Here are some other posts I have done on similar topics