All Questions
34
questions
0
votes
0
answers
17
views
U-Boot on alternative pins
My GPIO 14/15 pins (and I believe UART0 and UART1) are broken, so I cannot use the default serial port for U-Boot.
How can I get U-Boot to boot on a different serial port on my Raspberry Pi 4B?
- 101
-1
votes
1
answer
37
views
Minimal config.txt for enabling UART0
I am attempting to connect to the UART0 on my Raspberry Pi 4B. I have shorted together GPIO pins 14 and 15 (pins 8 an 10 on the header). I then run picocom /dev/ttyAMA0 and see if it's echoing (it ...
- 101
0
votes
0
answers
63
views
USB serial port
Trying to connect USB serial port device to raspberry Pi4.
But command below does not show any changes
ls -l /dev/tty*
I was expected to get new device that starts with /dev/tty . Correct me if I'm ...
- 163
0
votes
0
answers
25
views
USB devices changes ttyACM and device rumber on automatic reconnect
I have a Quark elec AIS receiver connected to my raspberry pi 4 and after some randon amount of time it disconnects en reconnects. After this the device number and the ttyACM* number changes. See the ...
- 1
0
votes
1
answer
91
views
How to disable sysrq on UART
I am trying to talk to a device over serial (ttyAMA0 or serial0) and it works, but sometimes I get the following TX from my rpi4, which crashes the device I talk to:
[22763.820857] sysrq: HELP : ...
- 11
0
votes
0
answers
43
views
BlueDot Serial Bluetooth server for OBD
I am building an OBD Raspberry PI car dashboard and I've been struggling to get the adapter to connect and send info. I recently learned that the rfcomm support was dropped years ago by bluez and was ...
- 1
0
votes
0
answers
45
views
OBD Raspberry Pi bluetooth and serial connections issues
So I've been trying to get my digital dashboard code working and I have to connect to the OBD plug to the Pi but ive run into a plethora of issues since then. The first time I did it, the OBD device ...
- 1
-1
votes
1
answer
1k
views
How to enable serial communication on Pi 4 using BookWorm OS?
Raspberry Pi 4 and Latest Raspbian Bookworm OS.
I want to have Pi 4 communicate over serial connection using GPIO14 (BCM) and GPIO15 (BCM) or UART TX and UART RX.
I have followed the same setups that ...
- 1,063
1
vote
1
answer
577
views
Handling of USB connection breaks in Python3
I have USB connection from RPI4 to Pico, usually occupying ttyACM1, but occasionally after connection break/boot it may get values ACM2 or AMA0
I am trying to build an automatic recovery if USB is ...
- 11
1
vote
2
answers
601
views
Real TTY Driver installation - Moxa 5110 not able to connect /dev/ttyr01: Input/output error
trying to get my Moxa Nport 5110 to work with the RPI4.
Currently Using:
Raspbian GNU/Linux 10 (buster)
installed moxa-real-tty-drivers-for-linux-kernel-5.x-v5.1
added some tty ports automatically (...
- 11
0
votes
0
answers
411
views
Waveshare 2CH RS232 HAT on Raspberry pi 4 not sending nor receiving message
Hi Raspberry pi enthusiast,
Recently i'm using 2 Channel RS232 Hat from waveshare placed on top of raspberry pi 4. And i already follow all the instruction on this waveshare's wiki. but, until right ...
0
votes
1
answer
1k
views
monitoring two serial ports simultaneously
For my project I need two serial ports and I need to monitor both and act accordingly.
Example of what I need to do:
Port A and Port B
Monitor all the time Port A and when message is received, I need ...
- 11
-1
votes
1
answer
81
views
Can't get the correct serial response between Raspberrypi 4 and Pico
I'm trying to make a little connection between both my Raspberry pi 4 and my Pico.
Everything was ok until the pico suddenly stoped recieving what I'm sending from the Raspberrypi.
Expected Outcome
I ...
- 31
0
votes
0
answers
2k
views
Different UART behavior between ttyS0 and ttyAMA0
I'm using serial to communicate with this board (Serial-CAN-Board) on a RPi4. UART is enabled with
enable_uart=1
Console over serial has been disabled with raspi-config and I am using SSH over ...
0
votes
0
answers
688
views
Bluetooth serial connection between Pi and MacOS Monterey on M1 Macbook both with builtin bluetooth
How do I connect a Raspberry Pi 4 Model B Rev 1 to an M1 Macbook Pro 16" using rfcomm over a Bluetooth connection?
I'm able to connect the devices via Bluetooth but then not over the Bluetooth ...
