What baud rate have you set YAAC to, to communicate with the tnc? Should be 19200. Mat

Initially I was loading them up with defaults, but at one point I tested one to see if I had to do it and they defaults were there, so that led me to believe I didn't need to do that, so I stopped. Sh

I will need to check my notes, but there not very many steps to take in order to use your TNC to connect to a node and relay a message. All of the steps were through the GUI as well. Nothing was done

Depending on which board you purchase the appropriate firmware is pre loaded. For instance if you get a TNC configured with the Raspberry PI headers then it has firmware loaded to interact with the PI

Ok, download and flash the stand alone firmware to you tnc. It should show up as a com port on your computer now. Start up Winlink Express and start a packet session. Configure you TNC settings as sho

Is there a Winlink node in your area? Do you have access to a Windows computer? Mat

Glad you got is working! So something else I found that was nifty was that the Raspberry Pi 4 has 4 serial ports. https://www.raspberrypi.org/forums/viewtopic.php?t=244528 In theory you could jumper t

You actually can choose which pins from the Teensy you want to have routed Pi. If you jumper the pins as shown below then pins 0 and 1 from the Teensy are routed to the PI. I then have the following d

My version 1.3 5/21/2016 PCB from Costal Chipworks has pins 0 and 1 going to the PI headers. pin 7 and 8 are not connected to anything. Do you have a different version? Mat

All I changed from John's original design was how some of the traces were routed, (I guess I have a touch of OCD). I cleaned up how each component was marked to make assembly easier. I changed all the

Does the red led come on? Check your solder joints. Mat

Reply to N5XMT regarding defaults. Review this post for what I use as defaults. https://groups.io/g/RaspberryPi-4-HamRadio/message/11255 Mat

I'm not sure why I did this, but in TeensyConfigpkt.h I had changed the pins as show below. I think 2 and 3 were reversed before. NBD. #define LED0 24 #define LED1 25 #define LED2 26 #define LED3 31 M

Good afternoon. Here is what I would do. Download and flash this hex file onto your Teensy. https://drive.google.com/file/d/1uEHR1VqJA8TeiaRo_qYLLpsIReV__E2K/view?usp=sharing Next, transfer this file

I am testing version 11 to make sure everything is working before I start loading it on new TNC's. I have noted that the default values are not being set on the Teensy when I first flash it. This is w

Those were modifications I had made to the code. It looks like John added the led cycle part which is cool. If you want to add the "power" led Look for this code in /libraries/TeensyConfig/TeensyCommo

John, I downloaded the latest version as I think it would be wise to ship something a bit more current then I have been. Anyway, I got to compile again. On about line 432 in the SM_Teensy sketch you h

Here is a link to their manual. Look at page 11 - 13. ttp://www.tnc-x.com/TNCPi9K6.pdf I will update ours with the bits that are missing from that section. Mat

While a Baofeng would not be my first choice to do packet, I have got it to work. They just are not very selective or sensitive so your millage will vary. I have had the best results by adding a resis

This the is the current board design we are using. https://drive.google.com/file/d/1uU-Qt5nYFYEJlfq02vV5k8Kx0G8usHi0/view?usp=sharing Mat