Hi @JColvin
Regarding the drop-down and string you mentioned above I think you were looking into jpeyron post not mine since I used a string and put in the string with many names for the ports but not succeed.
I'm using arduino Uno with the RPI3 and the results of the dmesg | grep tty as below:
pi@pi:~ $ dmesg | grep tty
[ 0.000000] Kernel command line: 8250.nr_uarts=1 bcm2708_fb.fbwidth=1280 bcm2708_fb.fbheight=1024 bcm2708_fb.fbswap=1 dma.dmachans=0x7f35 bcm2709.boardrev=0xa02082 bcm2709.serial=0xc2a6a8 bcm2709.uart_clock=48000000 smsc95xx.macaddr=B8:27:EB:C2:A6:A8 vc_mem.mem_base=0x3dc00000 vc_mem.mem_size=0x3f000000 dwc_otg.lpm_enable=0 console=tty1 console=ttyS0,115200 root=/dev/mmcblk0p2 rootfs elevator=deadline rootwait
[ 0.001349] console [tty1] enabled
[ 0.322505] console [ttyS0] disabled
[ 0.322668] 3f215040.uart: ttyS0 at MMIO 0x3f215040 (irq = 59, base_baud = 31250000) is a 16550
[ 1.051637] console [ttyS0] enabled
[ 2.080172] 3f201000.uart: ttyAMA0 at MMIO 0x3f201000 (irq = 87, base_baud = 0) is a PL011 rev2
[ 11.785598] systemd[1]: Expecting device dev-ttyS0.device...
[ 13.808806] systemd[1]: Starting system-serial\x2dgetty.slice.
[ 13.858610] systemd[1]: Created slice system-serial\x2dgetty.slice.
[ 15.411382] cdc_acm 1-1.5:1.0: ttyACM0: USB ACM device
and the resluts of the instruction in the thread in your post is:
pi@pi:~ $ sudo schroot -r -c lv
shell-init: error retrieving current directory: getcwd: cannot access parent directories: Success
root@pi:.# opkg update
job-working-directory: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory
Downloading http://feeds.labviewmakerhub.com/armv7a/ipk/all/Packages.gz.
Inflating http://feeds.labviewmakerhub.com/armv7a/ipk/all/Packages.gz.
Updated list of available packages in /var/lib/opkg/lists/uri-all-0.
Downloading http://feeds.labviewmakerhub.com/armv7a/ipk/armv7a-vfp/Packages.gz.
Inflating http://feeds.labviewmakerhub.com/armv7a/ipk/armv7a-vfp/Packages.gz.
Updated list of available packages in /var/lib/opkg/lists/uri-armv7a-vfp-0.
Downloading http://feeds.labviewmakerhub.com/armv7a/ipk/generic_armv7a/Packages.gz.
Inflating http://feeds.labviewmakerhub.com/armv7a/ipk/generic_armv7a/Packages.gz.
Updated list of available packages in /var/lib/opkg/lists/uri-generic_armv7a-0.
root@pi:.# opkg upgrade visa
job-working-directory: error retrieving current directory: getcwd: cannot access parent directories: Success
root@pi:.# opkg update
job-working-directory: error retrieving current directory: getcwd: cannot access parent directories: Success
Downloading http://feeds.labviewmakerhub.com/armv7a/ipk/all/Packages.gz.
Inflating http://feeds.labviewmakerhub.com/armv7a/ipk/all/Packages.gz.
Updated list of available packages in /var/lib/opkg/lists/uri-all-0.
Downloading http://feeds.labviewmakerhub.com/armv7a/ipk/armv7a-vfp/Packages.gz.
Inflating http://feeds.labviewmakerhub.com/armv7a/ipk/armv7a-vfp/Packages.gz.
Updated list of available packages in /var/lib/opkg/lists/uri-armv7a-vfp-0.
Downloading http://feeds.labviewmakerhub.com/armv7a/ipk/generic_armv7a/Packages.gz.
Inflating http://feeds.labviewmakerhub.com/armv7a/ipk/generic_armv7a/Packages.gz.
Updated list of available packages in /var/lib/opkg/lists/uri-generic_armv7a-0.
root@pi:.# opkg upgrade visa
job-working-directory: error retrieving current directory: getcwd: cannot access parent directories: Success
root@pi:.#
please advise what is the next step