USB Interface Drivers: Arduino/YourDuino Nano

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Most Nano boards use FTDI chips for USB interface. This uses the same FTDI drivers supplied with Arduino IDE. See it here:

A virtual COM port is a software emulation of a physical COM interface. Also known as a virtual serial port, it is used to connect legacy serial software programs on computers that don’t have any physical serial interfaces. In the absence of real COM ports, a virtual serial port emulator can send serial data over an IP-based network.

However some use the WCH type CH340G chip and require a different driver. They are usually lower cost.

If you have this type of Nano, the USB chip on the underside of the board will be long and narrow, and marked WCH CH340G. See it HERE:

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You need to install a different USB driver for these. Use the following procedure:

Download the driver software HERE:

(Your system may not allow downloading .EXE files, so click on this ZIP version):

You need Winzip or other utility to extract the EXE from the ZIP.

Before connecting the Nano to your USB port: Open “ch341ser.exe” file and run it.The software extracts about 8 files.

The software asks whether it can install the CH341SER.INF driver for the CH340 chip (Version 11/04/2011, 3.3.2011.11).

Click INSTALL

A Windows message asks whether the driver has installed correctly. Click YES.

Connect your Nano.

From Control Panel, open Device Manager and Ports. If installed correctly you should see an entry “USB-SERIAL CH340 (COMXX)

In the Arduino IDE, go to: Tools>Board (Select Nano)Tools>Port (Select the com port number found in Device Manager)<

Test by uploading File>Examples>Basics>Blink MAC Version: As always, It's Complicated. See the site HERE:

I have successfully got FT891 running under TRX-manager: http://www.trx-manager.com/index.html

1) Install the dual serial port driver from Yaesu website.
See manual here: http://www.yaesu.com/airband/downloadFile.cfm?FileID=9515&FileCatID=42&FileName=USB%5FDriver%5FInstallation%5FManual%5FENG%5F1610%2DB0.pdf&FileContentType=application%2Fpdf

(Note: the 891 has dual serial ports, it does not have an USB soundcard).

2) Reboot the PC and check that you see two serial devices in your Device manager (type device manager when clicking the start button)

3) Hold F on the FT-891 in a couple of seconds (long click)

4) Goto menu 05-06
Set CAT RATE to 38400

6) Goto menu 05-08.
Set CAT RTS to DISABLE (unless you do that you may have a problem getting data thru)

7) Set the rate to 38400 in TRX-manager (setup menu) and select FT-891. Also select correct COM port (on my PC it was COM5. It may be different on yours).
Remember: unless you set CAT RTS to DISABLE (see above) you will not get data thru and you will mess around in the TRX-manager menus while the problem was a setting in the FT-891 menu.

8) Stop and restart TRX-manager

9) You may hear a clicking sound for every CAT transmission in your FT-891 loudspeaker (A bit annoying… I have to admit that even if I like Yaesu radios)

10) Click F on the FT-891 (short click)

11) Goto MON on the FT-891 menu

12) Click on MON

13) Turn down the MON level to 0
Note: This applies regardless if you have MON ON or MON OFF (this is a bug in Yaesu’s firmware. Rare. LOL)

14) Now you have CAT control without any clicking sounds on your FT-891

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15) Enjoy your Yaesu FT-891

Comments about the FT-891:

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Plusses: the FT-891 has in my view a better and more modern RX than the ageing FT-857, even better than IC7300 (some ppl. claim) http://www.eham.net/reviews/detail/13042?page=2 , it is a low cost modern mobile 100W HF rig with a small detachable front, it has DSP RX, a nice variable RX filter, works well down to low voltages even if someone claims it doesn’t, has a much better menu system and a better VFO, it has a reasonable current draw on RX (even if the datasheet overstates this a bit it is below 1A on my rig).

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Minuses: No VHF or UHF ( however that may be a benefit. Not the compromises that probably are in the 857 rf chain). No USB soundcard (do you really need that in a mobile station?), 60M USB has to be programmed in a memory and you go memory tune from there and it will keep USB even if you are below 10 MHZ.