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Most ofthethe modules on Amazon are not RS232, but TTL serial. I have used the WINGONEER HC-05 Bluetooth module with my TT4 an MTT4B. For ghe TT4 (kit), I just changed both jumpers to the TTL

I noticed on the byonics website the Bluetooth unit TT4BT is out of stock...I was wondering if anybody knew when there was going to be more in stock or a good alternative to it? I seen little

Hi Rob, Thanks for responding so quick. I looked on the display interface and I saw what I hoped would be a potentiometer but it seems that it is something like epoxy. In response to setting for a

The part you are looking for is a small trimmer pot. You will find it just above the "TT4" on the display adapter board. I believe it is yellow, and it is oriented vertically, so it is adjusted from

Are you looking for a POT on the TT4 or Display?The contrast POT is on the display interface - opposite side from the keyboard connector. Also, did you set NODISP FALSE (inverse logic meaning there

Hello to everyone. I am again begging assistance to solve a problem. I purchased a Tiny Trak 4, the display unit, gps and all needed cables from Byonics. I think I have the TT4 programmed correctly

Glad it worked! Robert Giuliano KB8RCO

Rob is wise in the ways of the TT4! Allen AF6OF

Hi Rob, You gave me the solution by telling me to disconnect the DB9 connector from the TT4 instead of the USB connector from the computer. Thank you very much. 73, John KN4BLF

Hi Allen, Thank you for your assurance and a thanks to all for all of their suggestions. Rob suggested that I unplug the DB9 connector from the TT4 instead of the USB connector from the computer as I

Gervais,? The Byonics programming cable ( USB-TT3) does supply power to the TT4 for programming. An ordinary serial cable won't. I think its pretty clear that John has the USB cable that will power

John, Don't panic. If you can't make it work, either Byon or I will be happy to take a look at it, unless we can find a person with a black-belt in configuration nearer to you willing to help out.?

If i may add i am just working on a new TT4 here, if i want my PC to talk to it,i must have 12 vdc apply from my radio outlet db9,,without that i cannot. just the cable between the pc and the tt4,,its

Hi Rob, Thanks for your suggestion but shorting one pin to another is not possible for me due to hand tremors. I am using the least amount of cables and if it comes down to soldering a switch in then

Hi Dan, I got gibberish on my first attempt but in the dozen or since I got nothing. The Tiny Trak manual is specific about using 19200 for a baud rate. I went to Device Manager and set that COM port

Hi Allen, I have gone back and verified jumper settings at least twice. I have also verified that the cables are plugged into the correct DB9 connectors. This is a new unit from Byonics so it would

Hi Gil, I only got gibberish on my first attempt. During the last dozen or more attempts I only get a blinking cursor. Thank you for your suggestions. 73, John KN4BLF

The Arduino USB serial port shares IO pins D0 and D1 (not D1 & D2 as stated below).? So pin D2 is available for use as a Software Serial pin. Robert Giuliano KB8RCO Pasted in from another message -

If this unit was received only a few weeks ago, either port will have access to the bootloader. Bother ports start at 19200,n,8,a and the TT4 sends the same "?" and "Press ESC 3 times to enter TT4

Whenever I see gibberish on a serial port I always think I am somehow using the wrong baud rate. Try different baud rates and see if you get what is expected. --Dan Meyer / n0kfb