I’ll assume, by keyboard analysis, that D@ is D2, that is just an “I am powered up” LED. Necessary for sure.
D3 and D4 indicate that there is some activity on the USB connection (serial Tx and Rx)
I assume that when you power up tinyG, or hit the reset button, that D6, SpinDir, flashes at about 1/sec interval, red for about 10 seconds then extinguishes. That is good. The 10 second interval is the tinyG bootloader running, waiting 10 seconds for you to possibly want to communicate with the bootloader, after which it boots the loaded tinyG FW and the led extinguishes.
Go back to CoolTerm. Make sure you do not have SPJS running.
When you open your Coolterm session, you should see a tinyG mm> prompt.
If you don’t, hit enter on keyboard. If still no luck, hit the reset button on tinyG, after the 10 second delay you should see the tinyG mm> prompt.
If no prompt, you are not connected to tinyG.
If prompt, enter a $ then enter, you should see a short dump of parameters.
If still good, enter $$ and enter, now you get a full parameter dump.
Copy the full parameter dump and paste into a text file.
Copy the text file to a cloud drive (Dropbox, Gdrive, etc) and provide a URL so I can look a your full setup.
Also report what your host computer is(Win, MAC, Linux), what browser you are using for Chilipeppr, and how you run SPJS