Hi! I don't have any serial over bluetooth device. I have been using Rpi3. The telescope connects through printer usb connector cable. I have attached a picture of it. This time I have connected a TPlink wifi adapter and the Meade LS8 in USB port. See the results:

bao@bao-desktop:~$ dmesg | tail -n 20
[ 497.560367] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 497.560380] usb 1-1.4: Product: 802.11n NIC
[ 497.560392] usb 1-1.4: Manufacturer: Realtek
[ 497.560404] usb 1-1.4: SerialNumber: 00E04C0001
[ 497.564610] Chip Version Info: CHIP_8188E_Normal_Chip_TSMC_D_CUT_1T1R_RomVer(0)
[ 498.716633] r8188eu 1-1.4:1.0 wlxec086b11c324: renamed from wlan1
[ 498.781609] IPv6: ADDRCONF(NETDEV_UP): wlxec086b11c324: link is not ready
[ 499.289767] MAC Address = ec:08:6b:11:c3:24
[ 499.291374] IPv6: ADDRCONF(NETDEV_UP): wlxec086b11c324: link is not ready
[ 499.302350] R8188EU: ERROR indicate disassoc
[ 499.316207] IPv6: ADDRCONF(NETDEV_UP): wlxec086b11c324: link is not ready
[ 499.455753] IPv6: ADDRCONF(NETDEV_UP): wlxec086b11c324: link is not ready
[ 500.529539] usb 1-1.2: new high-speed USB device number 10 using dwc_otg
[ 500.630783] usb 1-1.2: New USB device found, idVendor=04cc, idProduct=0000
[ 500.630805] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 500.630818] usb 1-1.2: Product: Meade eFinder Serial Emulator
[ 500.630831] usb 1-1.2: Manufacturer: Meade
[ 500.630843] usb 1-1.2: SerialNumber: 1234567890
[ 500.632393] cdc_acm 1-1.2:1.0: Zero length descriptor references
[ 500.632426] cdc_acm: probe of 1-1.2:1.0 failed with error -22

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