[chirp_users] Direct connect from Pi to Yaesu FT-4 succeeds

[Chuck Hast]

Those are beautiful pieces of art... Gotta get me one.... Still love my
Pi's though...


On Tue, Apr 9, 2019 at 1:37 PM Dan Clemmensen <danclemmensen at gmail.com>
wrote:

> Here is the requested diagram for the FT-4. Note that the Baofang uses a
> different cable.
>
> WARNING: Please do not blindly adapt this for other radios. This entire
> scheme can probably be adapted for any radio that uses a 3.3V setial
> connection, but if you plug in an older radio that uses higher voltages,
> you can fry you little computer, and/or your radio.
>
> NOTE: if you use a serial port that is configured as a login port (a
> "console") you OS can spew lots of stuff to the port. This can in theory
> confuse your radio. This is true of any serial port the CHIRP uses in any
> OS, but it may be more important to think about this when using itty-bitty
> computers, since they tend to configure at least one serial port as a
> "console" port.
>
> This scheme "should" work on any itty-bitty computer that can support
> CHIRP and that has a 3.3V serial port. On a Raspberry Pi, your OS will be
> richer. You will not need the X-over-SSH trick, and if you do use it you
> will need less setup.  On a Raspberry Pi, you use pins (6,8,10) as
> (GND,TxD,RxD), and your OS will see the port as /dev/ttyS0).
>
> My NanoPi Duo is running the sun8xi linux distro provided by FrendlyELEC,
> who manufactures the NanoPi. the distro is  based on Ununtu, so you use
> apt-get to install packages as needed. To support CHIRP, I installed xorg,
> since the supplied image uses something strange. To actually use CHIRP, I
> use ssh -Y from my Linux desktop computer to allow CHIRP to present its X
> window to my desktop computer's screen via the magic of X-over-SSH.
>
> I'm connecting the radio to NanoPi's second serial port, which is on pins
> labelled RX1 (pin 20) and TX1 (pin 22)  and of course GND (pin 6) on the
> NanoPi headers. This port is known to the OS as /dev/ttyS1.
> Here is he requested diagram:
>
> NanoPi                                                             FT-4
> MIC plug
> pin 6  (GND)----------------------------------------------------------
> sleeve
> pin 20 (RX1)----------------+-----------------------------------------tip
>                             |
> pin 22 (TX1)---2K resistor--+
>
>
> On Tue, Apr 9, 2019 at 10:33 AM <dropkick23 at gmail.com> wrote:
>
>> Dan,
>>
>> I'm a little brain dead when it comes to hardware. Would you post a
>> simple diagram of how you wired FT4 to NanoPi? Witch OS are you running on
>> the NanoPi?
>>
>> Thanks
>> Fred
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>
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-- 
Chirp + Editcp + MD380Tools on Linux
Celestial!!!
Chuck -- KP4DJT
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