All Questions
23
questions
1
vote
1
answer
84
views
USB and RS485 on same lines for ESP32-S3
For an ESP32-S3 based PCB that I am developing, I would like to be able to share 1 connector for two different communication protocols.
USB connection directly to IO19 and IO20 of the ESP32-S3-wroom1
...
0
votes
1
answer
165
views
How to connect USB-to-RS485 adapter to RS485-RJ45 input of an LFP battery BMS? [closed]
I have Victron Multi 48/5000 connected to Cerbo GX. Works fine.
Now I need to connect Cerbo GX to the LFP battery, to RS485 (because no CAN input).
...
- 101
5
votes
5
answers
2k
views
Do FTDI serial port chips use a soft UART, or a hardware UART?
I'm considering using an FTDI cable for RS-485, and I'm wondering who controls the driver enable and how. Is it in a hardware UART, a soft UART, or by the PC the USB is plugged into (very unlikely).
I'...
- 197
1
vote
2
answers
1k
views
Is it possible to use an RS232-USB cable (with an FT232RL chip) for RS485-USB communication?
I have a standard RS232 to USB cable found on Amazon.
It does not work out of the box. This is what I expect since RS232 uses a ground reference and RS485 uses a differential between the two data ...
- 51
1
vote
1
answer
473
views
Flashing an ATMega microcontroller using a USB Connection
I'm trying to get into embedded system design and have been hung up on what hardware is required to use a USB connection to communicate with the microcontroller (and therefore, flash it). Here's what ...
- 11
3
votes
2
answers
653
views
Connect multiple devices with USB
Consider a setup with 1 "server" device and 4 "client" devices (all are SBCs with Ubuntu installed). I would like to connect the 4 clients to the server, using USB/serial. Ethernet ...
- 151
-1
votes
1
answer
257
views
Micro USB and RS485 Compatibility
I am looking into understanding micro usb better and seem to be missing something apparently obvious different about the difference between micro usb and rs485.
From looking online like here, the ...
- 111
4
votes
1
answer
5k
views
USB to RS485 converter on Linux [closed]
I have a USB to RS485 converter:
It has a CH341 chip, that is all I know about it. When I plug it in, I can see that it is bound to port ttyUSB0. I want to be able to send and receive bytes from PC (...
- 287
0
votes
0
answers
179
views
USB Solution to Bit Bang RS485 at a high Baud Rate
I am searching for a solution to write a ~800 byte data stream at a 10K baud rate from a USB device.
This is going to connect to a piece of hardware that uses a RS485 connection which expects an ...
- 123
1
vote
1
answer
1k
views
FT4232H: Configuring RI# as TXDEN Using FTProg
I am developing a device based around two FTDI FT4232H quad USB-to-Serial converters plugged into a Texas Instruments TUSB2046 USB hub controller. The serial outputs of each FT4232H channel goes to a ...
- 21.4k
0
votes
1
answer
75
views
Long Range (100m) USB(PC) to USB (microController USB module) Communication
I have a system that communicates between PIC32MX250F256D (USB module) and PC via USB (2 meters apart). And I need to increase the range of this communication to 100 meters. Due to typical 5m limit of ...
- 171
1
vote
1
answer
1k
views
USB to RS485: Can I connect A to Common Ground?
I bought a very cheap USB to RS485 dongle to connect to an experimental board of my own.
Specifications (may differ from the one I used but externally similar):
- Any baud rate from 1200 bps to 115 ...
- 2,360
1
vote
2
answers
887
views
RS-485 to USB converters (cable conversion)
I am working on a project that involves a Solar Charge Controller. The device ships with an Ethernet RS-485 communication interface as well as a RS-485 to USB cable, which is said to be able to ...
- 121
0
votes
0
answers
220
views
RPi USB to Serial testing
I have a system like this:
RPi -> FTDI(USB UART IC) -> RS485 transceiver -> RS485 TO USB board -> PC
I'm having some trouble testing RS485 communication between the RPi and the PC.
I'm using a simple ...
- 89
0
votes
2
answers
168
views
Help figuring out the interface on this bill validator?
I would like to interface this bill validator to a microcontroller (Arduino Mega). The website says it supports RS232,RS485,Optoisolated RS232 and USB interface.
The one I have is currently intefaced ...
- 17