Is it possible to connect to device using ADB through serial port?

[ji fei]

I am now connecting my development device through ethernet because the usb port hasn't been enabled. But every time i restart some thread the connection is disconnected and dispatching a app to device is also very slow. So i doubt is it possible to using serial port to connect?
thanks

[Alvin Wong]

Hi there,

I think the only way to debug through serial port is to use a serial
console, like setting "console=/dev/ttyS0,115200n1
androidboot.console=/dev/ttyS0" (is it right?). Using adb through
serial seems not possible (unless you can emulate the adb protocol or
ethernet through the serial port, but this would be very rare).

I suppose you should be able to use adb through network (tcp). Are you
using it now? I now debug my device through WiFi, even when I have
`adb logcat`, `adb shell` and `adb shell cat /proc/kmsg` all running
at the same time the speed is quite fast. When I `adb push` some
files, the speed is 141 KB/s (10104 bytes in 0.069s), which is quite
acceptable. I expect running through wired ethernet can be much
faster.

I just add `setprop adb.tcp.port 5555` to init.rc to be able to use
adb via network. Don't even think of using serial port as the speed
would be much much slower.

Good luck,
Alvin Wong

[sai]

I know there is a daemon(adbd?) in the android device to communicate
with pc host. you can read the source code of adb.maybe repair it for
serial port.

[Alvin Wong]

First I would like to reply to ji fei's message:

Well connecting through network isn't the best method, especially when
you are debugging core functions. My WiFi connection also resets when
the system_server is restarted. But once you get the system_server
stable it is quite good. Or if you can get rid of the USB gadget if
you have a USB controller, it is better to be used.

Otherwise I think adb via network is the second best method.

You can still use the serial port to act as a console. Perhaps not as
convenient as adb, but at least you get a stable console. (I wished I
have a serial port connected on my device, then porting could be
easier)

2012/2/6 ji fei <...@gmail.com>:
> I can complete every work except "adb sync" using serial port.
> adb logcat:   echo "logcat" > /dev/ttyS0 && cat /dev/ttyS0 &
> simulate some keystroke: echo "input keyevent 3" > /dev/ttyS0
>
> Other command can be done using " echo cmd > /dev/ttyS0" and cat /dev/ttyS0
> will print the stand output of target device. I did this just because the
> connection of Ethernet is not very stable and when i restart system_service
> process i have to reconnect.



Now reply to sai's message:

Yes there is adb for debugging.

However I think using adb via serial port is far too complicated, as
you have to modify both adbd and adb on the host computer. It doesn't
worth the effort.