how to access hardware serial port on Raspberry Pi3, Ubuntu 16.04
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I have a Raspberry Pi3 running Ubuntu 16.04. I am logged in via ssh.
I want to connect a hardware device to UART0 at GPIO pins 8 and 10. As best I can figure this should correspond to /dev/ttyAMA0. But I try this shell command and the terminal hangs, the command never returns and even control-C does not work.
echo "testing 123" > /dev/ttyAMA0
It is not a simple permission problem. I'm in the dailout group. Here is what "ls" says
crw-rw---- 1 root dialout 204, 64 Jun 1 16:26 /dev/ttyAMA0
Here is the lines from dmesg | grep ttyAMA
[ 0.833340] 3f201000.uart: ttyAMA0 at MMIO 0x3f201000 (irq = 87, base_baud = 0) is a PL011 rev2
hardware raspberrypi serial-port
asked Jun 2 at 0:14
user3150208
1061
add a comment |Â
up vote
1
down vote
favorite
I have a Raspberry Pi3 running Ubuntu 16.04. I am logged in via ssh.
I want to connect a hardware device to UART0 at GPIO pins 8 and 10. As best I can figure this should correspond to /dev/ttyAMA0. But I try this shell command and the terminal hangs, the command never returns and even control-C does not work.
echo "testing 123" > /dev/ttyAMA0
It is not a simple permission problem. I'm in the dailout group. Here is what "ls" says
crw-rw---- 1 root dialout 204, 64 Jun 1 16:26 /dev/ttyAMA0
Here is the lines from dmesg | grep ttyAMA
[ 0.833340] 3f201000.uart: ttyAMA0 at MMIO 0x3f201000 (irq = 87, base_baud = 0) is a PL011 rev2
hardware raspberrypi serial-port
asked Jun 2 at 0:14
user3150208
1061
1
Open the device withscreenlikescreen /dev/ttyACM0 <baud rate>. Personally I usebyobu-screen, it might be easier, it opens session window automatically. Then try typing and press enter. There's other ways, too, butscreenis easiest.
– Sergiy Kolodyazhnyy
Jun 2 at 1:58
add a comment |Â
up vote
1
down vote
favorite
up vote
1
down vote
favorite
I have a Raspberry Pi3 running Ubuntu 16.04. I am logged in via ssh.
I want to connect a hardware device to UART0 at GPIO pins 8 and 10. As best I can figure this should correspond to /dev/ttyAMA0. But I try this shell command and the terminal hangs, the command never returns and even control-C does not work.
echo "testing 123" > /dev/ttyAMA0
It is not a simple permission problem. I'm in the dailout group. Here is what "ls" says
crw-rw---- 1 root dialout 204, 64 Jun 1 16:26 /dev/ttyAMA0
Here is the lines from dmesg | grep ttyAMA
[ 0.833340] 3f201000.uart: ttyAMA0 at MMIO 0x3f201000 (irq = 87, base_baud = 0) is a PL011 rev2
hardware raspberrypi serial-port
asked Jun 2 at 0:14
user3150208
1061
I have a Raspberry Pi3 running Ubuntu 16.04. I am logged in via ssh.
I want to connect a hardware device to UART0 at GPIO pins 8 and 10. As best I can figure this should correspond to /dev/ttyAMA0. But I try this shell command and the terminal hangs, the command never returns and even control-C does not work.
echo "testing 123" > /dev/ttyAMA0
It is not a simple permission problem. I'm in the dailout group. Here is what "ls" says
crw-rw---- 1 root dialout 204, 64 Jun 1 16:26 /dev/ttyAMA0
Here is the lines from dmesg | grep ttyAMA
[ 0.833340] 3f201000.uart: ttyAMA0 at MMIO 0x3f201000 (irq = 87, base_baud = 0) is a PL011 rev2
hardware raspberrypi serial-port
asked Jun 2 at 0:14
user3150208
1061
asked Jun 2 at 0:14
user3150208
1061
asked Jun 2 at 0:14
user3150208
1061
asked Jun 2 at 0:14
user3150208
1061
1061
1
Open the device withscreenlikescreen /dev/ttyACM0 <baud rate>. Personally I usebyobu-screen, it might be easier, it opens session window automatically. Then try typing and press enter. There's other ways, too, butscreenis easiest.
– Sergiy Kolodyazhnyy
Jun 2 at 1:58
add a comment |Â
1
Open the device withscreenlikescreen /dev/ttyACM0 <baud rate>. Personally I usebyobu-screen, it might be easier, it opens session window automatically. Then try typing and press enter. There's other ways, too, butscreenis easiest.
– Sergiy Kolodyazhnyy
Jun 2 at 1:58
1
1
Open the device with
screen like screen /dev/ttyACM0 <baud rate>. Personally I use byobu-screen, it might be easier, it opens session window automatically. Then try typing and press enter. There's other ways, too, but screen is easiest.– Sergiy Kolodyazhnyy
Jun 2 at 1:58
Open the device with
screen like screen /dev/ttyACM0 <baud rate>. Personally I use byobu-screen, it might be easier, it opens session window automatically. Then try typing and press enter. There's other ways, too, but screen is easiest.– Sergiy Kolodyazhnyy
Jun 2 at 1:58
add a comment |Â
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1
Open the device with
screenlikescreen /dev/ttyACM0 <baud rate>. Personally I usebyobu-screen, it might be easier, it opens session window automatically. Then try typing and press enter. There's other ways, too, butscreenis easiest.– Sergiy Kolodyazhnyy
Jun 2 at 1:58