Portable setup

[Josh Logan]

I'm working on boxing up a pi4, regulator and hermes lite to use portable.  I have tested the setup and it works well from a 3s LiPo battery.

How concerned should I be about noise by putting the regulator and pi inside the case?

73, KD7HGL

Josh

[Probir]

Hi Josh,

 

Could you please send the details of Pi4 integration.  I am planning to integrate HL2 with Pi4 very soon. Wandering any documentation is available.

 

73,

VU2BQF Probir

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[DL2RMM]

Hi Josh,

I also boxed up the HL2 with a 12V-to-5V converter and Raspi4 in an 55mm high enclosure (see pic1). Initially I had the same concerns about interference.

It turns out some birdies from the Raspi4 are visible without antenna connected. However, as soon as the antenna is connected the noise floor raises above the birdies .....so I had no problem operating that way.

In a second step I made my set-up even more dense in the enclosure ..... I intergated the HL2 with a Raspi4 and the PiHPSDR controller board (plus a display driver board for a 7" touch screen). The "sandwich" can be seen in pic2 . Same (low) birdies visible but no impact to my operation. As soon as the antenna is connected the birdies are covered under the noise floor.

Pic 3 shows the final set up.

So, I'd not be too concerned about boxing up the HL2  with a Raspi4 in the same enclosure.

73 de Jens - DL2RMM

[Josh Logan]

I have been collecting some notes, but more about trying out different ways to box up and power both the radio and the Pi.  

Remote access is via VNC:
https://www.raspberrypi.org/documentation/remote-access/vnc/

A laptop is best for troubleshooting, but wsjt-x works fine from a tablet or even a phone.

Turning the Pi into an access point was easy with these steps:

https://thepi.io/how-to-use-your-raspberry-pi-as-a-wireless-access-point/

https://www.raspberrypi.org/documentation/configuration/wireless/access-point-routed.md

I'm currently working FT8 and have the best luck with pihpsdr and wsjt-x via loobpack audio:

https://github.com/g0orx/pihpsdr/wiki/Compiling-piHPSDR-on-Raspberry-Pi-running-Raspberry-Pi-OS

https://physics.princeton.edu/pulsar/k1jt/wsjtx.html

There is no real-time clock on the Pi, so it will lose time as the computer is off.  I'm using a GPS device to set the clock on boot:
https://www.amazon.com/gp/product/B07ZR8R17Q

Here are some steps on setting up gpsd:
https://raspberrypi.stackexchange.com/questions/87076/gps-on-raspberry-pi-3

And ntpd:

https://weberblog.net/ntp-server-via-gps-on-a-raspberry-pi/

Here is the script I run on boot that watches for a time report to set the clock:
http://m0iax.com/2018/11/30/setting-the-raspberry-pi-system-time-using-a-gps/

I call that script from /etc/rc.local, so it runs every time on boot.

Let me know what else you want to see on the software side and I'll try to add some more information to the notes I have.

73, KD7HGL
Josh

[Scott AK5SD]

Jens,

Wow, that is really nice work. Have you published any information about your build (particularly the version with the integrated screen) so others can duplicate it?

73,

Scott

AK5SD

[Martinus P]

Jens ,

I am alsoo intrested in the stand alone, i have the VFO encoder working, end drive encoder and AF encoder,

But the switches i cannot selected.

so what are pins and gpio pins.

is there  somewhere a Manual?

73,

Martien,

PA3DZA

Op zondag 24 januari 2021 om 01:55:50 UTC+1 schreef Scott AK5SD:

[DL2RMM]

Scott,

the version with the integrated touch panel is a "PiHPSDR Controller V2" which I customized by integrating the HL2 board and re-designed frontpanel.

I use Christofs, DL1YCF version of PiHPSDR software on this stand-alone HL2 radio.

There is a lot of information about the  "PiHPSDR Controller V2" in different threads in our HL2 google group. I did not keep separate build notes.

The attached pic shows the PiHPSDR controller V2 board (black PCB) with attached Raspi4. The diplay is the standard 7" touch screen for the Raspberry Pi. The HL2 is mounted to the rear enclosure wall.

73  Jens-DL2RMM

[DL2RMM]

Hello Martien,

I'm not sure if you're also using the PiHPSDR controller board or connecting the switches directly to the GPIO pins of the RPi.

Please see the attached schematic of the PiHPSDR controller board .... the rotary encoders are connetced directly to the respective GPIO pins of the RPi.

However, the 16 switches are routed via a MCP23017 I/O expander chip.  Only two pins (GPIO2&3) are connected to the RPI with I2C connection.

In the PiHPSDR software you just assign the desired action of each switch => see second pic.

73 de Jens - DL2RMM

[Martinus P]

Hi Jens,

I had found your picture a week ago, and i understood  you used not directly the switches,

and i know pin numbers on the rasberry are different with gpio.

first in the startscreen i enable the encoders with gpio numbers,

each encoder have 4 gpio,

i use only the first 2 of each encoder,

encoder switch is alsoo an gpio number,

then start

menu and select encoders,

int that menu item you give the encoder  what to do?

I hope you understand my explenation.

Tnx Martien.

Op zondag 24 januari 2021 om 12:20:55 UTC+1 schreef DL2RMM:

[DL2RMM]

Hello Martien,

I attached the detailed configuration of my PiHPSDR start screen for the rotary encoders and the I2C switches => see attachments

If you like we can take this discussion offline => please contact me via email (QRZ.com)

73 de Jens-DL2RMM