Got an IC-2730E with the black display and wanted to program it via Linux.
Made the interface using this diagram:
The 3.5mm plug is to connect on the radio "Ext speaker jack 2"
The USB connection of the converter was recognized as /dev/ttyUSB0 , that can be changed on CHIRP.
Screenshot of some memories programing:
And the radio display:
Also IMPORTANT I only managed to upload/clone In when setup on CHIRP the radio as IC-2730A (America), with the setup for IC-2730E (Europe as mine is) it was only allowing to clone out and failing on the upload.
The USB to RS232 adapter is from a listing with the following name: "USB to Serial RS232/UART TTL/RS485 DB9 Converter Adapter Module FTDI FT232BM/BL" others similar might also work. Here's mine along withe connection made on the plug.
Also it only worked correctly when the jumpers were on the "RS485" side, I guess that is for setting which output of the module, either DB9 or TTL.
CHIRP command on Linux was run from downloaded file "Chirp-next-20260918-x86_64.AppImage": this way: ./Chirp-next-20260918-x86_64.AppImage
Links for reference:
CHIRP on Linux
https://chirpmyradio.com/projects/chirp/wiki/ChirpOnLinux
ICOM IC-2730 DIY USB PC programming interface FTDI
https://www.dk9jc.de/blog/equipment/210-icom-ic-2730-diy-usb-pc-programming-interface-ftdi
Ham Radio Remote Control The IC 2730
https://simplehrr.com/simple-ham-radio-remote-project-rpi-ic2730-rmt
Icom OPC-478 interface
http://ok1dx.cz/constructions/opc478/opc478.html
p.s:
This bellow type of module also works, a bit more flaky because sometimes has to be reconnected on the usb port again and Chirp software restarted:
In any case the final product is using this module with all components soldered directly on the terminals:
During testing:
The same adapter also work with Hamblib rigctl on the IC-2730
Get the model of the radio to use on "-m" option
$ rigctl --list | grep 2730
3072 Icom IC-2730 20210907.0 Untested RIG_MODEL_IC2730
Set frequency (120.925Mhz):
$ rigctl -m 3072 -r /dev/ttyUSB0 -s 9600 -vvv -c 0x90 F 120925000
icom_get_freq: rig does not support 0x25 CI-V cmd
Opened rig model 3072, 'IC-2730'
Get frequency:
$ rigctl -m 3072 -r /dev/ttyUSB0 -s 9600 -vvv -c 0x90 f
icom_get_freq: rig does not support 0x25 CI-V cmd
Opened rig model 3072, 'IC-2730'
120925000
Get frequency without using verbose:
$ rigctl -m 3072 -r /dev/ttyUSB0 -s 9600 -c 0x90 f
120925000
Setting frequency without verbose:
$ rigctl -m 3072 -r /dev/ttyUSB0 -s 9600 -c 0x90 F 145505000
getting the frequency after:
$ rigctl -m 3072 -r /dev/ttyUSB0 -s 9600 -c 0x90 f
145505000
$
Have a nice day!
