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Testing the USB FTDI Cable without remote attached

 
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110220Volts



Joined: 17 Mar 2007
Posts: 105
Location: Trumbull, Connecticut

PostPosted: Thu Mar 01, 2018 12:21 pm    Post subject: Testing the USB FTDI Cable without remote attached Reply with quote

My friend bought a new FTDI on eBay and I cannot get it to work according to the eBay sale page the wire colors are exactly the same as mine, So I assembled the cable with a 2X3 header in the same order as mine. My cable works

The computer (Windows 10 64-Bit) will see the device (So I at-least know the USB PCB end is good) and install the driver and assign a virtual com port but I keep getting the dreaded "No Remote Found" message.

I can have RMIR set to auto detect or the direct com port nothing works

Is there a way to further test the cable without a remote attached?
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binky123
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Joined: 14 Feb 2004
Posts: 1291

PostPosted: Thu Mar 01, 2018 3:22 pm    Post subject: Reply with quote

Ebay listing has these notations for wiring color:

Red wire: 5V
Black wire: GND
White wire: RXD
Green wire: TXD
Yellow wire: RTS
Blue wire: CTS

Perhaps the colors/signal names are not the same as your cable?

There are some fake chips that are using the FTDI usb vendor id as well.

Just some things to check out.
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110220Volts



Joined: 17 Mar 2007
Posts: 105
Location: Trumbull, Connecticut

PostPosted: Thu Mar 01, 2018 8:01 pm    Post subject: Reply with quote

Is there a way to find out what each wire does (Other then the wire colors?)
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binky123
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Joined: 14 Feb 2004
Posts: 1291

PostPosted: Thu Mar 01, 2018 8:38 pm    Post subject: Reply with quote

I found a post here that suggested downloading Tommy's instructions to identify a remote's signature using Realterm for help identifying a JP1.3 remote. But that is for use with a remote.

The realterm program may be useful in identifying the pins though. If you hook up RX to TX. You should see echoes of what you type into realterm on the screen. i.e. if you type the character A, it should get sent out TX and then RX should receive it and display the character A on realterm.

If you have a voltmeter(or maybe a resistor and LED?) and you can also determine which pin is what by enabling that button in realterm and seeing if the voltage changes for that wire.
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