Linked Questions
10 questions linked to/from Multiple Rpi Serial Ports Problem
9
votes
2
answers
17k
views
How many serial ports are on the Pi 3?
How many serial ports are on the Pi 3? There is one on the GPIO pin that goes to ttyS0. Is there a separate one for USB? I have read somewhere about /dev/ttyUSB0. Is that a separate serial port?
...
- 419
0
votes
2
answers
9k
views
using GPIO pins as TX/RX pins
I'm working on a project that needs multiple TX/RX pins, but the Raspberry Pi that I have only has 1 of these pins. Can I use the GPIO pins as TX/RX pins? Or is there an adapter available somewhere?
...
- 33
0
votes
2
answers
3k
views
How can Rpi listen to a GPS module?
Hi guys i'm quite new to raspberry pi and i'm having trouble with a GPS module that i have bought.
https://wiki.52pi.com/index.php/USB-Port-GPS_Module_SKU:EZ-0048#Trouble_Shooting
i go to installing ...
- 11
0
votes
2
answers
1k
views
txd and rxd pins with same numbers at the end of name
So I was looking at alternate functions of the GPIO pins of the Raspberry Pi 3b+ and found that some GPIO pins do support txd and rxd alternate functions. However some are named txd0/rxd0 and some are ...
- 33
3
votes
2
answers
893
views
Increase number of ttys
I am running Raspbian 9 on my RPi 3 B+ and I have only 6 usable ttys (Ctrl-Alt-F#) while other are blank with blinking cursor. ls /dev lists 64 such ttys. How do I enable/run something on them?
- 33
1
vote
0
answers
1k
views
How can Rpi4B use multiple on board and USB based UART / serial ports?
there. I am trying to use rpi 4 to access my own device through UART. However, the number of UART port isn't enough for me since I'm trying to access more device in same time. Thus, I want to know if ...
- 21
1
vote
3
answers
533
views
Reading time off of a cellular modem with python 2.7 and pyserial
TL;DR:
I need to read the time off of my Hologram Nova USB cellular modem on /dev/ttyACM0 and update the system clock after the pi restarts. I'd like to do it in Python but it isn't reading the ...
- 133
1
vote
2
answers
275
views
Is it possible to change Rx pin as GPIO15 is damaged?
I rather stupidly connected 5 V logic directly (without using a level shifter) to Rx, GPIO 15 (pin 10), of my RPi 2B and now it appears to have stopped functioning.
Could I configure another pin ...
- 2,730
1
vote
1
answer
322
views
Share Uart Pins
In my build i have a gsm module ( SIM800L ) connected to a RPI 0 W in this way:
I would like to get also the current position of my device, for do so i was thinking to buy a Gps module ( NEO-6M STM32 ...
- 111
1
vote
0
answers
86
views
Is it possible to connect multiple USB devices to the I2C bus on RPI?
I want to control lots of USB devices from a single Raspberry Pi. So far I have only tested with RPI4 and I could only connect about 5 devices concurrently. The limitation is caused first by the fact ...
- 121