MobileRead Forums - View Single Post - Aura H2O How to get messages from the serial port ?

sahbi · 03-09-2017, 04:33 AM

Thanks Peter, I already know that thread and all other threads about connecting a uart usb to a kobo(but no H2O), found also other blog entries.
I describe here what I've done until now maybe it helps others:
1. put this at the end of rcS (needed for telnet)
mkdir -p /dev/pts
mount -t devpts devpts /dev/pts
2. and this in inetd.conf (start 2 daemons)
21 stream tcp nowait root /bin/busybox ftpd -w -S /
23 stream tcp nowait root /bin/busybox telnetd -i
3. this goes in inittab
::sysinit:/etc/init.d/rcS
::respawn:/sbin/getty -L ttymxc0 115200 vt100
::ctrlaltdel:/sbin/reboot
::shutdown:/bin/umount -a -r
::restart:/sbin/init
::respawn:/usr/sbin/inetd -f /etc/inetd.conf
compress all in a KoboRoot.tgz, connect the H2O, deposit KoboRoot.tgz in .Kobo and let the reader upgrade.
Now I have telnet access to insmod g_serial.ko that I have cross compiled with the linaero toolchain, insmoding g_serial.ko gives an error, dependencies problems, could cirmumvent this by insmoding first arcotg_udc.ko.
Attached the "uart usb" to the host, dmesg says it's connected to ttyUSB0, configure minicom for ttyUSB0, 115200... now between "uart usb" RX to TX, TX to RX and GRND to GRND.
what now ????

03-09-2017, 04:33 AM	#3
sahbi Enthusiast Posts: 42 Karma: 50 Join Date: Oct 2011 Device: Sony:psr 650 , KOBO:aura h2O, KOBO:Aura One	Thanks Peter, I already know that thread and all other threads about connecting a uart usb to a kobo(but no H2O), found also other blog entries. I describe here what I've done until now maybe it helps others: 1. put this at the end of rcS (needed for telnet) mkdir -p /dev/pts mount -t devpts devpts /dev/pts 2. and this in inetd.conf (start 2 daemons) 21 stream tcp nowait root /bin/busybox ftpd -w -S / 23 stream tcp nowait root /bin/busybox telnetd -i 3. this goes in inittab ::sysinit:/etc/init.d/rcS ::respawn:/sbin/getty -L ttymxc0 115200 vt100 ::ctrlaltdel:/sbin/reboot ::shutdown:/bin/umount -a -r ::restart:/sbin/init ::respawn:/usr/sbin/inetd -f /etc/inetd.conf compress all in a KoboRoot.tgz, connect the H2O, deposit KoboRoot.tgz in .Kobo and let the reader upgrade. Now I have telnet access to insmod g_serial.ko that I have cross compiled with the linaero toolchain, insmoding g_serial.ko gives an error, dependencies problems, could cirmumvent this by insmoding first arcotg_udc.ko. Attached the "uart usb" to the host, dmesg says it's connected to ttyUSB0, configure minicom for ttyUSB0, 115200... now between "uart usb" RX to TX, TX to RX and GRND to GRND. what now ????