Questions tagged [uart]
a Universal Asynchronous Receiver/Transmitter, better known as serial port
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The Raspberry Pi 3B+ and the stm32 also encountered an error when communicating
I’m working on a project that involves communication via UART between a Raspberry Pi 3B and an STM32F103 microcontroller. Here’s a brief overview of the task:
The Raspberry Pi performs object ...
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Can't communicate device with his RS323 to 2 pins uart of GPIO
I have a a microbench device, it has his RS232 port.
but I just can read data from this microbench device with this cable:
The microbench device have tx pin with -9V. How can I comunícate microbench ...
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Receiving String Data From Secondary Arduino on Main Raspberry PI I2C
I am working on a project where I'm trying to implement 14 RDM630 RFID sensors that will send any recorded RFID tags to the Main RPi. Unfortunately, these sensors use RS232 communication, and it seems ...
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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?
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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 ...
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how to decode sbus in uart?
I need to read the sbus signal coming from my receiver mc7rb-v2 using raspberry pi 5, I have made a signal inverter as stated in the manual of the receiver and connected to uart pin, I use pyserial to ...
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Can't enable Rpi4's UART3
I'm trying to enable all UARTs in the Raspberry Pi 4. Based on my experiment this is the usable UARTs I discovered.
UART1 /dev/ttyS0 GPIO 14,15
UART2 /dev/ttyAMA1 GPIO 0,1
UART4 /dev/ttyAMA2 GPIO 8,...
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Raspberry Pi Zero W UART, Bluetooth, and USB
I have a Raspberry Pi with Bluetooth using the /dev/ttyAMA0 and a UART using /dev/ttyS0. Is it also possible to use the USB as another UART? Are pins 14 and 15 tied to the USB as well?
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Which UART can I use to send character to Raspberry Pi during boot process?
I am using Raspberry Pi 3 model B and Raspberry Pi 4 model B. I connect 3 pins: GND, GPIO14 (UART_TX) and GPIO15 (UART_RX) with my PC and use Minicom to display the boot message. However, I can not ...
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When is the 'disable-bt' dtoverlay necessary?
I have a Pi 3B+. There are a number of resources out there that suggest it is necessary to enable the disable-bt overlay in order to make use of the serial UART on GPIO 14 & 15. E.g., this ...
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How to display data from uart on raspberry pi 4
I have problem with receiving data from the raspberry pi 4 uart (ttyS0). I have ADC converter, which returns me hexadecimal string with data. The Przemytnik class is for connecting c++ language with ...
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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 : ...
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RPi Pico: Is it dangerous to set GPIO drive strength of 12mA on all the UART-related pins
I'm working on a project with the RPi Pico that makes use of both the UARTs and has two LEDs attached to other random-ish GPIO pins. The LEDs will probably be turned on for the majority of time that ...
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GNSS module do not working with raspberry pi, but working on pc
I have an error with my GNSS module. I use it with an usb-uart driver, and when I connect it to my computer, and read datas with u-center or in a python script I get continously updated position ...
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Test functionality of a PL2303 USB-to-UART converter
I want to connect my computer to my raspberry pi (Model 3 A+) via serial console. Here is what I did (following the setup instructions described here):
In the Raspbian OS enable serial in the ...
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