Date   

Heat sinks

Doc Dowd, W1DOC
 

Maybe "up your heat sink" game:
Use a copper, rather than an aluminum heat sink. It transfers heat more efficiently.
Fins are only effective if you are using a cooling fan to move the air around.
Use thermal paste instead of a stick on pad.


Re: RPi-zero 2 W heat issues

Vic WA4THR
 

Some good ideas here. Note, I have more than enough speed to run Fldigi and WSJT-X with the zero 2...no issues with that and I think there is some excess capability, which is why I was thinking of "underclocking". I had run the original Pi-zero overclocked about 10%, but never had any heat issues.

The Swap file only gets to about 70%, as does memory usage in the worst case and usually less. CPU usage is below 40%. The only issue has been heat buildup and shutdown, and only when running Fldigi. I can delay it by leaving the top off the small case, but as room temps rise into the 70's even that is not enough. I just checked and the "slow CPU" option was automatically selected on the 4.1.01 version I am using. The diplay is optimized for the little 8" display on the Kindle Fire I am using to interface with the Pi. Bluetooth is off, but the WiFi is a critical part as the unit is running headless and linking to a simple tablet in the field, even out of WiFi range using it as a hotspot.

Is there a heatsink somewhere that is the same size as the whole Pi-zero that could substitute for the plastic top of the Vilros mini-case or something similar? That roughly 800% increase in surface might do the job.

=Vic=


Re: RPi-zero 2 W heat issues

Mérlin
 

You could try reducing the background tasks or a different 'cleaner' image which has less of the unnecessary background tasks already removed(i dont know how much of background processing the standard image of the R-Pi Zero takes) Might also try reducing the display resolution as then the GPU wouldnt have to work that hard. Also turn off Wi-Fi/Bluetooth if possible. These are just some of the things that jump out to me while attempting to make the Pi go QRP!
-Mérlin


Re: RPi-zero 2 W heat issues

David Ranch
 


Hello Vic,

I have had a Raspberry Pi-zero W for a while for portable digital ops...nice and compact and runs forever with low battery drain, but it is a bit slow.

Makes sense since it's basically a Rpi v1 with a single old ARM v6L core but without HDMI, wired Ethernet, etc.


So, when the zero 2 W came out, I was eager to swap it in the same little case. It is fantastic, FT8 decodes right away and Fldigi loads and runs well

It's basically a depopulated Raspberry Pi 3 with less RAM.  I'm surprised programs like these run very well at all with only 512MB of RAM.  Are you sure your Rpi isn't swapping when running say Fldigi?  Look at the "used" column when running the command line program "free".  It will never be zero but if it's consuming all of your configured swap, performance will be dramatically impacted and your SD card will fail far sooner than it should.     Btw, if you're not running the new Raspberry Pi OS "Bullseye" release yet, be warned as this will probably get harder to run big memory footprint programs with that OS version due to additional bloat.


...except for one thing. Running only Fldigi and Conky to monitor the processor the heat steadily rises relatively quickly until somewhere past 134F it shuts the thing off. Adding a heatsink helps, but the rise is inevitable and happens within 20 minutes or so, depending on ambient temperature, even with the Pi out of the case.

It all comes down to cooling.  You're doing the right things here.. hopefully that's a good heat sink with a good thermal pad (many cheap heatsinks have *terrible* thermal pads btw).  You might consider trying other BIGGER heatsinks or even entire-case heatsink cases like the FLIRC line of all-metal cases ( https://flirc.tv/more/flirc-raspberry-pi-zero-case ).  If your case+heatsink has good ventilation for the heat build up, maybe you need a fan for those high CPU draw scenarios.


I could add a small fan, but now I am defeating the size and power use benefit.

Instead of a full time fan, you might consider running a temperature controlled *variable* speed fan:   https://www.trinityos.com/HAM/CentosDigitalModes/RPi/rpi4-setup.html#60d.appendix-cases-fanctl .  The solution is quiet and only runs the fan fast enough to get the meet the temperature you set.


Note that this problem seems to be only with Fldigi, not any of the other programs like WSJT-X or LinPSK that run cool and work well. So my question is whether there is something I could do like underclocking to control temps when running this program? Any other ideas?

Underclocking and undervolting might be a possibility but it also might slow the Pi down enough that those applications won't run very well anymore:

   https://www.reddit.com/r/raspberry_pi/comments/aki1is/reducing_power_of_the_raspberry_pi_3_b/


There are other settings in Fldigi that might help here:

   - Turn on the "Slow CPU" feature - http://www.w1hkj.com/FldigiHelp-3.22/miscellaneous_configuration_page.html
   - Slow or outright stop the waterfall


--David
KI6ZHD


Re: RPi-zero 2 W heat issues

Don Rolph
 

I got a 14 mm square aluminum heat sink and placed it on my Raspberry PI Zero 2 W.  I do  not seem to be having issues.  My case has plenty of ventilation.


On Tue, Nov 16, 2021 at 9:46 AM Vic WA4THR via groups.io <vhklein=ptd.net@groups.io> wrote:
I have had a Raspberry Pi-zero W for a while for portable digital ops...nice and compact and runs forever with low battery drain, but it is a bit slow. FT8 doesn't get decoded before the next cycle most of the time, making for repeats, and Fldigi just won't run. So, when the zero 2 W came out, I was eager to swap it in the same little case. It is fantastic, FT8 decodes right away and Fldigi loads and runs well...except for one thing. Running only Fldigi and Conky to monitor the processor the heat steadily rises relatively quickly until somewhere past 134F it shuts the thing off. Adding a heatsink helps, but the rise is inevitable and happens within 20 minutes or so, depending on ambient temperature, even with the Pi out of the case.

I could add a small fan, but now I am defeating the size and power use benefit. Note that this problem seems to be only with Fldigi, not any of the other programs like WSJT-X or LinPSK that run cool and work well. So my question is whether there is something I could do like underclocking to control temps when running this program? Any other ideas?

=Vic=



--

73,
AB1PH
Don Rolph


RPi-zero 2 W heat issues

Vic WA4THR
 

I have had a Raspberry Pi-zero W for a while for portable digital ops...nice and compact and runs forever with low battery drain, but it is a bit slow. FT8 doesn't get decoded before the next cycle most of the time, making for repeats, and Fldigi just won't run. So, when the zero 2 W came out, I was eager to swap it in the same little case. It is fantastic, FT8 decodes right away and Fldigi loads and runs well...except for one thing. Running only Fldigi and Conky to monitor the processor the heat steadily rises relatively quickly until somewhere past 134F it shuts the thing off. Adding a heatsink helps, but the rise is inevitable and happens within 20 minutes or so, depending on ambient temperature, even with the Pi out of the case.

I could add a small fan, but now I am defeating the size and power use benefit. Note that this problem seems to be only with Fldigi, not any of the other programs like WSJT-X or LinPSK that run cool and work well. So my question is whether there is something I could do like underclocking to control temps when running this program? Any other ideas?

=Vic=


Xiegu G90 + PAT Setup + Rig Control #pi #tnc #pat #flrig

Mérlin
 

Hi Everyone,

I have been trying to get PAT Menu setup with my HAM Pi image on RPi-4 which is hooked up to a Xiegu G90. I have watched these series by KM4ACK to get everything going. Here is the part 3 of it, which talks about Rig Control:

https://www.youtube.com/watch?v=ZCMHeuNjhK0

Unfortunately i not able to get rigcontrol to work properly with flrig. I have made sure i entered everything correctly especially in the .json config file  found here: ~/.wl2k/config.json

I also double checked my settings with the url here.

I also made sure i for the right model(According to Xiegu and many other websites, this model G90 works well when Icom IC-7100 is selected @ 19200 Baud). And this trick of using IC-7100 works no problem with wsjtx and other related software. This model comes out to '3070' when the output rigctl -l is printed to the terminal.  The following is the command i use to start the daemon.

rigctld -m 3070 -r /dev/ttyUSB0 -s 19200

The PTT doesn't work and i dont see any interaction by Pat to flrig when i hit Conect.

So the question i have is, should i try a different model number with rigcontrol?  Has anyone had luck trying to get  rigcontrol with flrig and using pat? I checked hamlibs supported radios page, there is still no official support for the Xiegu G90.

The latest version of flrig does seem to have the Xiegu G90 added in its list of Transceivers, but i wonder if its worth the update if in the end rigctl is not going to support it.  Attached(below) are the relevant screenshots.


Re: Simple Remote Radio

J Mathieson
 

There was a QST article a couple of years ago using No machine.  Which allowed two way audio and CW IIRC. Also used Flrig for radio control.  


Re: Can I program Teensy when connected to Pi

Mat Murdock
 

Easy fix.  Re-flash your Teensy.  Everything you need his here: http://www.wvcarc.com/p/tnc-96k-resources.html

Slide JP4 and 3 over and you should be good to go.

Mat


Re: Can I program Teensy when connected to Pi

Alan Whitman
 

Mat,

The lights no longer cycle when powering up (they did before I tried to re-flash).

I’ve attached a photo of the top. 


Thanks!
--
Alan7114p K6ZY


Re: Simple Remote Radio

Gerry Hull
 

The solutions for remote amateur radio are enless and simple, using off-the-shelf free software.

Since this is a raspi reflector, ill suggest some ways to do it using a Pi.

Audio in/our for Remote?  Use Mumble or Discord.  Dirt easy, flawless, low latency, and multi-platform.

Rig control?  Use your favorite raspi ham radio control software on the raspi desktop.

Then, use Anydesk to remotely connect.

Boom!  Full remote without a line of code or expense.

Ive been doing remote like this gor years.

73,

Gerry W1VE

On Tue, Nov 9, 2021, 11:47 AM Michael WA7SKG <wa7skg@...> wrote:
I have a need for a simple remote radio. All I need is two-way audio and
PTT. No channel control or anything needed. Ideally, something via a web
browser as a few of the users have limited computer skills. The user
would need to be able to monitor the radio for several hours at a time.
This would be used with both FM and HF radios, so the stream to the user
may have noise floor audio all the time.

My thought was to use something like a Pi Zero for the purpose, the
stream would have to be full duplex and use some I/O pins for the PTT.

The remote user would open a web page in a small window with a clickable
on/off PTT button (on a timer for safety) and hot key option. That
should allow use with a smartphone or computer.

This is a minimal budget project (aren't they all?) I don't need
anything fancy like a RigPi.

Thanks for any ideas or suggestions.


--
73,
Michael WA7SKG

"Any day you do not learn one new thing is a wasted day."






Re: Raspberry Pi OS Bullseye has been released..

N5XMT
 

I think the big point is the Raspberry Pi Foundation actually released a 64 bit OS that isn't Beta.  The link provided was the 64 bit version, not the standard 32 bit build of PiOS.  I'm running it now on 2 Pi Zero 2's, 2 Pi4B's, One 8g and one 4g, and a Pi CM4.
It's not "crippled" with missing drivers and incompatible graphics.

On Nov 10, 2021, at 20:57, Steve Spence <greentrust@...> wrote:
Nothing. It's nonsense verbiage. Yes, there is a new debian (bullseye), and a new raspberry pi OS based on it.

Steve Spence, KK4HFJ



On Thu, Nov 11, 2021 at 4:58 AM Tony via groups.io <ynotssor= yahoo.com@groups.io> wrote:
On 11/10/21 13:34, Jon Moran wrote:
No GUI has the GUI here! ...

What do it siggerfy?


Re: Raspberry Pi OS Bullseye has been released..

Steve Spence
 

unless he's trying to say that the "No GUI" distro (command line only) accidentally included the GUI interface. But he could have said that.

Steve Spence, KK4HFJ



On Thu, Nov 11, 2021 at 7:56 AM Steve Spence <greentrust@...> wrote:
Nothing. It's nonsense verbiage. Yes, there is a new debian (bullseye), and a new raspberry pi OS based on it.

Steve Spence, KK4HFJ



On Thu, Nov 11, 2021 at 4:58 AM Tony via groups.io <ynotssor=yahoo.com@groups.io> wrote:
On 11/10/21 13:34, Jon Moran wrote:
No GUI has the GUI here! ...

What do it siggerfy?


Re: Raspberry Pi OS Bullseye has been released..

Steve Spence
 

Nothing. It's nonsense verbiage. Yes, there is a new debian (bullseye), and a new raspberry pi OS based on it.

Steve Spence, KK4HFJ



On Thu, Nov 11, 2021 at 4:58 AM Tony via groups.io <ynotssor=yahoo.com@groups.io> wrote:
On 11/10/21 13:34, Jon Moran wrote:
No GUI has the GUI here! ...

What do it siggerfy?


Re: Can I program Teensy when connected to Pi

Mat Murdock
 

You can flash it while connected.  Do the lights cycle when you power the TNC up?   Send me a picture of top of the TNC.

Mat


Can I program Teensy when connected to Pi

Alan Whitman
 

I had been struggling with getting the Pi and TNC Pi-9k6 (Teensy 3.6) to talk with each other.  I have researched this quite a bit and tried every combination I could find.  BTW, I did enable serial ports on the Pi and they are listed, but they would not connect. 

In desperation, I tried re-flashing the Teensy 3.6.  I did it when it was in circuit with the Pi.  I think that I may have completely stopped it from working by doing this.  Is it possible to do this or am I just reduced to buying a new Teensy?  I will remove the Teensy from the board to re-flash or to replace it with new board.

Any advice will be appreciated.
--
Alan7114p K6ZY


Re: Raspberry Pi OS Bullseye has been released..

Tony
 

On 11/10/21 13:34, Jon Moran wrote:
No GUI has the GUI here! ...

What do it siggerfy?


Re: Raspberry Pi OS Bullseye has been released..

Dave R
 

On Wed, Nov 10, 2021, 13:54 Nigel Gunn, G8IFF/W8IFF <nigel@...> wrote:
What exactly does "No GUI has the GUI here" mean. Is it some new language?


> On 10/11/2021 16:34 Jon Moran <jon@...> wrote:
>
>
> No GUI has the GUI here!
>






Re: Raspberry Pi OS Bullseye has been released..

 

What exactly does "No GUI has the GUI here" mean. Is it some new language?

On 10/11/2021 16:34 Jon Moran <jon@...> wrote:


No GUI has the GUI here!


Re: Raspberry Pi OS Bullseye has been released..

Jon Moran
 

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