[arm-allstar] Hamlib / GPIOs for Channel Steering

[Patrick Perdue]

Greetings, Josh:

I have personally only used two radios as remote bases with 
HamVoIP/Hamlib, those being the Kenwood TM-D700A and the Kenwood TM-V71A.

Both work well enough, with different quirks for each radio.

I have yet to figure out a system for setting the CTCSS frequency from 
VFO, but switching to different memory channels, changing from A band to 
B band, whether or not the TM-V71A receives from A or B, or transmits on 
one band and receives from the other through Hamlib all work fine, as 
does adjusting the RF output power.

Cat control is a bit more limited for the TM-D700A, and the radio is 
very picky about what frequencies you can get to from VFO depending on 
which band is selected, and where the other band is parked. The TM-V71A 
doesn't seem to care about that sort of thing as much. I can't control 
the output power of the TM-D700A from Hamlib, as this doesn't seem to be 
supported. Don't know if that's Hamlib's TM-D700A support or the radio's 
fault.

Both radios are fine if you are just switching to different 
preprogrammed memory channels. However, I prefer the  TM-V71A, since 
CTCSS decoding is ,for all intents, broken with  the D700A and 
simpleusb, and any carrier will trigger COS. If you're using the 1200 
baud output of the radio, this results in COS but no audio if the 
squelch is not open. If you use the 9600 baud (discriminator tap) 
output, which I prefer to do, decoding is completely ignored.

There  may be a workaround for this that doesn't involve using the 
DSP-based CTCSS decoding of usbradio, though I'm not sure of it.


73

N2DYI


On 3/11/2024 11:39 AM, Josh Hatton via ARM-allstar wrote:
> Good Day to All,
>
> A few questions:
>
> 1) What dual-band radio has the most success working with Hamlib for remote
> base feature, as a "second node" on a HamVoIP image? Any lessons learned?
>
> 2) Has anyone successfully used Pi GPIOs to perform channel steering of
> Motorola GM300s? If so, are you able to explain how you got success in it?
>
> 3) Does Supermon have the ability to control Hamlib<>RS232 to serial<>radio
> through the webpage?
>
> Thanks to all for your advice.
>
> Josh W4ZZK
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