Firstly, thanks to Iain for providing some valuable clues with the Sesto Senso 2 driver configuration. I was testing on a Pi 3 with an Astroberry install and the latest build of KStars & INDI.
After a lot of hours I've finally got the Sesto Senso 2 connecting reliably and setup a persistent serial port mapping. This is what I found:
1. gpsd was determined to own the Sesto Senso 2 /dev/ttyUSB# device. I initially tried to prevent gpsd from intercepting the port by editing /lib/udev/rules.d/60-gpsd.rules but the attempt was unsuccessful. In the end I just disabled gpsd by editing /etc/default/gpsd (as per Iain's suggestion). I'm sure there's a better solution but for now it works for my needs.
2. I wanted to map the Sesto Senso 2 /dev/ttyUSB# device to /dev/sestosenso2 but INDI would fail to connect when I tried:
SUBSYSTEMS=="usb", ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="ea60", ATTRS{serial}=="insert_your_serial_here", MODE="0666", SYMLINK+="sestosenso2"It turns out /dev/sestosenso2 would end up pointing at a /dev/gpiochip# rather than the desired /dev/ttyUSB#...
After a lot of different approaches I discovered I could get it to point at the correct Sesto Senso 2 /dev/ttyUSB# using:
SUBSYSTEM=="tty", SUBSYSTEMS=="usb", ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="ea60", ATTRS{serial}=="insert_your_serial_here", MODE="0666", SYMLINK+="sestosenso2"Hopefully that helps someone else out there!
Cheers,
Will.
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