Cannot get the E32 to Pi connection working

[Bovril1a]

I followed the instructions set out to connect between 2 separate E32 - Raspberry Pi setups using the kiss.sh script and AX25 tools, to no avail alas...... 8-(

Using 2 x EBYTE E32 (868T20D) Tried with Pi Zero, Pi 3A, Pi 3B and Pi 4

Tried with both a USB - TTL adapter and direct connection to the UART pins on the Pi's (amended the kiss.sh script to ttyS0 and ttyUSB0 appropriately)

Swapped the TX and RX pins in both the USB and direct UART pin connection to check they were set OK

Ran "sudo axlisten" after starting "sudo ./kiss.sh" and ran both ping and traceroute first to the devoices own local IP (10.0.0.1 or 10.0.0.2), all OK then attempted to do this between both devices.

Saw attempts to connect through the AX0 port via "axlisten" but bombing out with no responses.

Not sure if I have missed anything, any ideas of next steps?

Thanks