All Questions
189
questions
0
votes
2
answers
62
views
Do FT232 come pre-programmed out of the package?
I'm working on a board which requires USB serial communication. For this I want to use an FT232RNL, however I'd like to know if I need to program it before I install it on the board. Also, do I need ...
- 31
1
vote
1
answer
94
views
USB to TTL (CH340G) quickly becomes unreadable
I bought a CH340G based USB to TTL converter to interact with a new embedded system I got. The output starts out fine but becomes unreadable after a few lines
...
- 113
0
votes
0
answers
31
views
Gibberish data with custom Atmega 2560 UARTs
So I have an issue with the UART configuration of my customized uC based on the ATmega2560.
To establish serial communication, I'm using the FT232RL chip and the Arduino IDE.
I don't have any issues ...
- 3
0
votes
3
answers
44
views
Use digital sensor with USB to serial TTL converter?
I have a sensor (HC2A-S3A), which provides analog and digital output signals. The digital interface is UART (19200 baud, protocol RoASCII). Can I use a USB to Serial TTL Converter (chipset: FTDI ...
- 101
0
votes
0
answers
276
views
ESP32-S3 USB Serial is read-only
I have a ESP32-S3-DevKitC-1 board. It has two USB ports, one connected to a USB to UART chip (brigde), the other connected to SoC directly (USB Serial).
The USB Serial is much faster than bridge for ...
0
votes
0
answers
46
views
Serial to USB aggregation with Pi
I'd like to aggregate 4 serial devices to a single USB device (a rPi zero with only 2 UART).
So far, I've been able to design the following schematic but I'm not sure of the components used nor if the ...
- 223
0
votes
1
answer
67
views
Serial port (USB) status, powering off a peripheral device vs. unplugging it?
I asked this question yesterday on Stack Overflow. It may be a hardware question, and it may be a software question. The question is getting very few views in the original forum, so I am reposting ...
- 141
1
vote
1
answer
235
views
USB-C: Adding Data Transmission to USB PD
Background
Texas Instruments' reference design PMP41013 exhibits bidirectional power transmission (DRP) via USB-C USB PD.
This is principally accomplished through an IC:
...
- 437
1
vote
1
answer
133
views
USB-C: USB PD plus Data Transmission: Possible?
Background
Texas Instruments' reference design PMP41013 exhibits the use of bidirectional power transmission (DRP) via USB PD via USB-C.
This is principally accomplished through the use of two ICs:
<...
- 437
-1
votes
1
answer
718
views
USB serial connection between Raspberry-pi and Android-phone
I have a Raspberry-pi-3-model-B and an Android phone device.
The connections are as follows:
My raspberry pi is connected to my laptop through USB (this is not the important part).
Also, from the ...
- 173
2
votes
1
answer
403
views
USB Port Design with ESD/Overcurrent Protection
I am working on a small project in which I use a CH340 to communicate with an MCU, but during prototyping I probably should have a way to protect the controlling computer's USB port from shorts. I ...
- 23
2
votes
1
answer
116
views
Placement of USB/UART converter for robustness and noise immunity: long USB cable or long EIA-422 cable
Consider the very common case of communication between the UART peripheral of a microcontroller and a PC, using a USB-UART converter such as are available from FTDI and others[1].
If there's a non-...
- 2,930
1
vote
3
answers
100
views
How to prevent power transfer (reverse current) between two DE-9 RS-232 cables? [closed]
we have two USB host devices that communicate with each other and as part of the chain, we are using two Serial to USB cables to connect them, like this:
We are not 100% sure as this happened at a ...
- 113
1
vote
1
answer
275
views
RS232 DCD over Serial-USB Adapter
I've been reading about PPS in linux and GPS synchronization.
I stumbled on some sources recommending using a USB GPS, I'm nto quite sure I understand how the interrupt signal is passed through.
The ...
- 111
0
votes
0
answers
990
views
How to make an ESP32 S2 not lose USB connection after uploading?
I am using an ESP32 S2 Mini, and I'm running into this problem:
I put the unit into the "flash" state, by pressing the "0" and "RST" buttons. Doing this establishes the ...
- 145