Hi Sean and Stelian,
thanks to your help, I have finally succeed to get a wired link between Openplotter and Tinypilot.
I have not made any change to networking.sh but I start Tinypilot in client mode with the Wifi fixed address 10.10.10.10. I open the terminal and go to Tinypilot by SSH (ssh tc@10.10.10.10), then I activate eth0 with ifconfig in tinypilot in client mode (sudo ifconfig eth0 10.10.10.11) and I can stop wlan0 in tinypilot and wlan9 in Openplotter.
Previously I have installed the extension net-usb-4.9.22.tcz (repo.tinycorelinux.net/9.x/armv6/tcz/net-usb-4.9.22-piCore.tcz) in /mnt/mmcblk0p2/tce on the Tinypilot Raspberry, created the file "onboot.lst" in /mnt/mmcblk0p2/ and added with sudo nano the line "net-usb-KERNEL.tcz" in onboot.lst.
If necessary I can restart wlan9 to connect an android tablet with VNC.
I don't know if all this operation is what is supposed to be done, but it's working fine so It's ok for me.
thanks to your help, I have finally succeed to get a wired link between Openplotter and Tinypilot.
I have not made any change to networking.sh but I start Tinypilot in client mode with the Wifi fixed address 10.10.10.10. I open the terminal and go to Tinypilot by SSH (ssh tc@10.10.10.10), then I activate eth0 with ifconfig in tinypilot in client mode (sudo ifconfig eth0 10.10.10.11) and I can stop wlan0 in tinypilot and wlan9 in Openplotter.
Previously I have installed the extension net-usb-4.9.22.tcz (repo.tinycorelinux.net/9.x/armv6/tcz/net-usb-4.9.22-piCore.tcz) in /mnt/mmcblk0p2/tce on the Tinypilot Raspberry, created the file "onboot.lst" in /mnt/mmcblk0p2/ and added with sudo nano the line "net-usb-KERNEL.tcz" in onboot.lst.
If necessary I can restart wlan9 to connect an android tablet with VNC.
I don't know if all this operation is what is supposed to be done, but it's working fine so It's ok for me.