P25RX Display

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cmjonesinc

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Alright everyone, got my hands on this beauty for some testing. As I'm giving it a good workout I figured I could answer everyone's questions.... to the best of my ability. I just fired it up ten minutes ago so it's new to me. If there is anything y'all want to know or anything you want me to check out, just ask. Like everything ever built the beta phase is always a learning experience for everyone involved, and I know Todd @btt is going to make the display as impressive as the P25RX itself.
 

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kinglou0

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Didn't want to start another thread so I'll chime in with my own pictures/videos and thoughts as well. Keep things somewhat organized.

Quality all around. Everything is nice and sturdy which is to be expected. Todd aka @btt makes nice stuff.

The touchscreen has been fairly responsive whether I use the stylus or not which is good because I don't plan on using a stylus. In the current firmware state, there really isn't a need to fiddle around with the screen anyways. You can toggle between the info screen, a volume screen, and you can select to hold on a TG or mute the audio from the info screen.

When I look at the info screen, everything is logically laid out and is sufficiently visible from just about every angle. I'm going to rig something up to do some mobile testing this week so I'll see how it performs in direct sunlight and in the car.

While I don't have any firm numbers, the display & P25RX are playing nicely with a USB battery pack. Overall power consumption seems to be good. The audio coming out is fantastic. Maybe??? better than the P25RX itself but that is probably just my bias towards something new or extra must be better.

Where am I going next with this display? I want to build a desktop/mobile unit that will have the P25RX, a rechargeable battery (or other power method such as a battery cell holder or a slot for a thin USB battery pack), an integrated speaker with some oomph, and this display built into the case. I'll get ports drilled out as well for the audio jacks and antenna port.

Getting a 3D printed case doesn't seem to be very cost efficient when I add in all of the features I want but who knows? I have a couple of electronics enclosures picked out and will slowly get them ordered up to see if they'll work. Never underestimate a motivated man with a Dremel tool.:cool:

I'm ecstatic that a display exists. My thoughts when I first jumped in months ago was superior performance while mobile without the need for complex programming or a high starting cost (I'm looking at you, Unication! Love you guys and my G5 is awesome even after 3 years of abuse). We're nearly there.

Great work to @btt
IMG_0777.JPEGIMG_0776.JPEGIMG_0775.JPEGIMG_0774.JPEG

Video 1 (crummy quality and using the stylus with non-dominate hand)
Video 2
 
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kinglou0

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Apologies to anyone trying to access the videos. Forgot to set link sharing.
 

cmjonesinc

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So a little update. Recently switched to nights at work and I'm just now leveling out and getting back to some of my other interests. So far I've left the screen and my P25RX running for several days at a time and all seems to be well. Performance wise it seems to be working great. My only complaints are really just some small aesthetic things.

So I turned off my Unidens and decided to make the P25RX coupled with the display my main scanner for a bit so I could really get a feel for it.

I love the screen, but all the information can be a bit 'much'. I would suggest perhaps a basic view and an advanced view. I don't know how everyone else uses their radios, but once I get mine programmed for what I want to hear I just set it and let it be. I only glance up at it to see who's talking occasionally, to hold on a tg, and to make sure all my sites are still there and no control channels have changed.

With that being said, I like having the talkgroup displayed largely across the bottom of the screen just as Todd has done here. But I did find one little issue with that. If you have a talkgroup saved and aliased it will display the name along with the tg number on the same line. This isn't really a big issue, but if you are like me and use tags longer than just "EMS1" or "FIRE" it will clip the tg number off the end (see attached picture). Personally if I have the tg saved and aliased I don't have a need for the number as well. I would like to see the unknown talkgroups display the number, and known ones just display the name.

Another thing that could be condensed down a bit for a 'basic view' would be combining the site id and the frequency. If I have just a site alias that will tell me everything I need to know (in a basic sense). I enjoying seeing sites change as everything is roaming but I would rather just see "TOWN 1" or "TOWN 2" as site names and not necessarily the frequency and actual site id as far as the system is concerned.

On that same note, an option to add a system alias would be great. I know what system 0xBEE00-0X1FC is when I look at it, but if I were scanning multiple systems it would be easier to just glance and see 'NC VIPER' or 'GUILFORD'.

RSSI I think is an absolute must on a display, but (get your pitchforks out, because I know some hate it) I prefer bars of signal strength. It's easy to glance at and see what you've got. I do like knowing what the dBm value is, but it's not something that is easy to just glance at in a mobile environment like a bar indicator. The IQ symbols definitely have their purpose as well but I don't find myself using them very much even when I'm using the P25RX with my PC.

Like I said earlier, I do like having access to ALL of the information when I want it, I'm certain some of you do as well. But for just normal scanning, especially when mobile, having a nice uncluttered screen where I can get all the basics with a glance would be nice.

I think a simple display laid out like this would work well. Unit ID also would be nice but I am kinda on the fence of whether that is an advanced view or basic view kind of thing.

(< 0 TGHOLD 0 >)
SIGNAL STRENGTH METER
SYSTEM ALIAS
SITE ID/ ALIAS
TALKGROUP ID


So there's my initial review! I wouldn't say any of these things are a deal breaker, but I think streamlining everything a bit would be easier on the eyes. I attached a picture to explain the talkgroup cutoff thing I was mentioning and giving a good look at the current layout.

As always @btt great job! Thanks for the opportunity to test this thing out and I'm really looking forward to see what is to come with the display and the P25RX. I'm going to continue on now that I finally have some time again to do things. I'll keep everyone updated with my findings.

20210512_165358.jpg
 

kinglou0

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I agree with everything above from cmjonesinc's post with exception that I would also want the RID Alias (or RID when no alias) in the simple view, as well.
Ditto x3.

Some random observations and a suggestion of my own.

The P25RX with the display is very power efficient. Just sips at a 30000 mAh external battery pack that I have powering the whole package. A week of 24 hour operation with Bluetooth and the pack is reporting 50% capacity left.

How accurate is the battery gauge? Who knows but very good news for anyone looking to build an enclosure with a battery of some type.

Display seems pretty sturdy as well. I was getting up from my desk and picked up my coffee mug in a really weird sweeping motion that ended with the mug smacking the screen of the P25RX display. Thought it was a goner. Nope. Not saying it’s bulletproof but it can take a smack from a ceramic coffee mug:cool:. I hate WFH….

The only QOL change that I would like is a control for display brightness.

Not a problem here at home but it’s going to be way too bright to use while driving at night. I like to drive in as dark of a car interior as possible. But, I could always figure out a shade of some type if it came down to it.
 

Cheeseburgers

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Wait, is the display available already???? What the heck. I feel out of the loop!
 

cmjonesinc

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The only QOL change that I would like is a control for display brightness.

Not a problem here at home but it’s going to be way too bright to use while driving at night. I like to drive in as dark of a car interior as possible. But, I could always figure out a shade of some type if it came down to it.

Great point! I didn't even think of that but I too would definitely want that feature.
 

pcman67

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Has anyone dabbled around with the firmware code for the display?

My programmer arrives tomorrow for the display and I plan on trying to customize the display to my liking. It’ll take me some time to get up to speed since I have ancient programming skills but I’m going to take a crack at it.
 

shirsch101

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I just received my display today and it works great. I too would like to have some changes made to the such as smaller font to more characters could be used for the Talk Group name. What type of programmer is required to program the display? Has any one come up with any enclosure ideas?
Todd, any enhancements you could make would be awesome.
 

kinglou0

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Has any one come up with any enclosure ideas?

Too many….

Really.

I keep circling around whether or not I want to make something that is easily broken down if I change how I use my P25RX.

I’ve found an enclosure that should work if I ditch the idea of an internal speaker and just use BT/line out audio. Continuing with the “ifs”, if I work up the courage to separate the P25RX from its current enclosure, I could probably gain a ton of room to work in a speaker, bigger battery, etc.

I might end up just doing it and just worry about getting a second unit down the road once the red hot demand dies down.
 

shirsch101

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Been using the display for the past few days and I just have a few questions.
Can the display and BT Config program work together?
What is the @A on the left hand of the display screen mean?
The audio seems choppy when I use the Audio Line-Out and Speaker-out jack on the display. When plugged directly into the P25RX the audio sounds great.
Other than these issues the display works great. I hope someone can come up with a way to customize the screen soon.
 

pcman67

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I just received my display today and it works great. I too would like to have some changes made to the such as smaller font to more characters could be used for the Talk Group name. What type of programmer is required to program the display? Has any one come up with any enclosure ideas?
Todd, any enhancements you could make would be awesome.

Any programmer that claims to work with STLink-V2 should work. I bought this one off Amazon:


Here is the connector assembly that would have to be soldered on to
the back of the pcb: JST SH Jumper 6 Wire Assembly - 8" - PRT-10361 - SparkFun Electronics

Here is information on how to wire it and some related commands/file for openOCD here:




Been using the display for the past few days and I just have a few questions.
Can the display and BT Config program work together?
What is the @A on the left hand of the display screen mean?
The audio seems choppy when I use the Audio Line-Out and Speaker-out jack on the display. When plugged directly into the P25RX the audio sounds great.
Other than these issues the display works great. I hope someone can come up with a way to customize the screen soon.
 
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