All Questions
36
questions
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
1
answer
28
views
Serial conection HMT310
How to connect the HMT310 via serial port? When I connect it and open PuTTY and put "?" for it to show me the data, it pulls all "U"s. I already checked that the baudrate and other ...
- 21
0
votes
3
answers
890
views
ESP32 custom hardware connection to USB-UART converter
I'm designing custom hardware based on the ESP32. I'm using Adafruit's ESP32 Huzzah as a reference. In the Adafruit design, an onboard CP2104 USB-to-UART chip is used, but I will be programming the ...
- 13
1
vote
1
answer
208
views
Raw mode control of USB device via TTL
An industrial device can be connected to a host computer via a standard USB port.
The USB port on the device itself is indeed a CH340 USB-to-TTL converter, which allows to control the device through a ...
- 1,025
0
votes
0
answers
494
views
FT232RL Chip is not working (USB to TTL)
I used an FT232RL chip to make a USB to TTL converter using the schematic below.
Although I can send a message and the TX LED is lightining up, I cannot receive any messages.
Can anyone see a problem ...
- 19
2
votes
2
answers
2k
views
SIM800L V2 not responding to AT Commands from Putty over USB-To-TTL PL2303
My SIM800L V2 RoHS (the blue one) although it connects to the network and registers just fine, it's not responding to AT commands sent over the PL2303 (USB-STC-ISP) USB-To-TTL Adapter through which it'...
- 21
0
votes
1
answer
170
views
TTL to USB (CP2102)(Driving 5V USB)
I have a USB to TTL Adapter. The Adapter uses the CP2102.
I noticed that the CP2102 seems to derive it's power from the USB V+. My problem is that I need to supply power to the USB. The reason is that ...
0
votes
1
answer
48
views
Is there an IC that works like the PL2303 for TTL TO USB? [closed]
Is there an IC that works like the PL2303 for TTL TO USB and can connect to android device with driver?
I have search a lot but I did not find such a thing.
1
vote
0
answers
150
views
Connecting RS232 GPS Board to Raspberry Pi
I purchased a NEO-6M GPS board to connect to my Raspberry Pi, and when I bought it I didn't realize that it was meant for RS-232 communication instead of UART TTL (which I believe is what the ...
- 121
-1
votes
1
answer
180
views
Are TTL to USB converters bi-directional? [closed]
I'm trying to convert 5V TTL signals into USB signals that a PC can read. However, most converters that I'm able to find are defined as USB-TTL converters. Can I convert TTL signals to USB signals ...
- 19
0
votes
2
answers
325
views
Using USB-RS232 adaptor for USB-TTL connection? [closed]
Seems there are plenty of questions relating going in the opposite direction, but I couldn't find anything that really told me if I could do this..
I have one of these https://uk.rs-online.com/web/p/...
- 3
1
vote
1
answer
422
views
Is voltage selector on 5v or 3.3v?
I bought this USB to TTL converter and it came with the option to switch between 5v and 3.3v. I want to use it at 3.3v, but I'm not sure where the (grounder?) should be placed? Thanks, see image below....
- 125
0
votes
2
answers
64
views
Connecting flowmeter via USB to a computer
I have a Swiss flowmeter sf800 which generates 5v pulses if liquid passes through it. I want to connect it to a computer and count pulses via USB. I realize that I need some kind of converter to do so....
1
vote
2
answers
678
views
Can I use a cheap logic analyzer as a USB to UART TTL cable?
I need a USB to UART (TTL) cable for connecting to an onboard JTAG connector. Since I already own a Sigrok logic analyzer, I figure it might function soley as a USB to UART cable. Is this possible?
...
- 2,397
-1
votes
2
answers
240
views
How to connect STM32F103C8t6 to computer when using USART? [closed]
I'm an electrical engineering student and I've just started to learn microcontrollers.I want to know is there any way to connect my board(I uploaded its picture)to computer when I'm using USART ...
0
votes
1
answer
1k
views
Why cannot I use the USB port directly to communicate via PC with STM32F4-DISC
I will keep it short and clean, if it won't be enough please let me know and add more details.
When using an Arduino UNO, a serial communication can be achieved by the same USB connection which is ...
- 2,106
3
votes
0
answers
370
views
Switch between USB and Bluetooth module TTL
In my project I have an MCU that I want to communicate with via 5V TTL serial. I have two methods of doing this in my circuit, USB via an FT232R (5V) and Bluetooth via an HC-05 module and level ...
- 183
0
votes
1
answer
1k
views
Supplying TTL Signal via USB
I have two pieces of hardware I'd like to interface with via USB. The first are 2002 Series Actuated Valves and the second is a Mass-Flo Controller for regulating gas exchange. To my (admittedly ...
- 1
2
votes
1
answer
565
views
PL-2303TA TTL UART data corruption
For a lot of projects, I use a fairly common USB to serial dongle called "Prolific USB to Serial" which uses a PL-2303 TA chip to allow USB to 3V TTL serial (i.e. this kind on Alibaba).
I actually ...
- 505
0
votes
1
answer
5k
views
Can't type on Virtual Terminal Proteus
I've connected my SIM900a module with PC via a USB to TTL converter. I'm using Proteus Virtual Terminal for check the AT commands. The problem is I can't type anything on the Virtual Terminal. Copy ...
- 161
0
votes
3
answers
3k
views
How to find out whether serial standard is RS232 or TTL when stated as "serial(RS232/TTL)"
I am recently moving from C programming into automation engineering. I have learned about RS232 and TTL standards, and I understand that they are based on the same concept of serial communication, ...
- 1
1
vote
2
answers
11k
views
What is difference between USB and TTL? [closed]
I have one question about USB and TTL.
Both USB and TTL works on the same voltage range (0 to +5 V), both are serial protocols. From my point of view, they are the same.
Why then we have USB to TTL ...
- 61
2
votes
1
answer
2k
views
USB to RS232 without host (slave devices)
I'm trying to get two slave devices (ie no host controller) to communicate.
Slave 1: USB with FT232RQ chip
Slave 2: DB9
Using standard USB to RS232 converter cables, I cannot get the two devices to ...
- 207
-2
votes
1
answer
511
views
Convert ps/2 to usb using ttl to usb converter [closed]
I have an old keyboard that has ps/2 interface. I have a ttl(V G tx rx) to usb converter too. Can i use this converter to connecting my keyboard to USB port?
What about RS232/RS485 to USB converter? ...
- 153
-2
votes
1
answer
10k
views
Differences in the rs232 series
Another question on chips. I want to program my esp8266 chip, and I need to know what to use. I've ordered a rs232rl 3.3/5v selectable board, but I want to know if this will work with an arduino, ...
- 264
1
vote
2
answers
1k
views
connecting 2 ftdi cables together
If I connect 2 FTDI cables together reversing tx and rx would I end up with a usb to usb cable ?
If so, I could connect a wireless FTDI adapter to a FTDI cable and get wireless usb.
Would I also ...
2
votes
5
answers
8k
views
USB to TTL communication problem
I'm trying to connect a device to my laptop using a TTL to USB converter like this one
but it doesn't works
so I tried the following configuration
(USB to Serial, RS232 to TTL and then to the ...
- 121
-2
votes
1
answer
227
views
Connect Schneider EM6400 to ESP8266 and call REST API [closed]
I have a Schneider EM6400 meter whose data I need to send to a web-service.
I dont know much about electronics so here it is-
How do I do it? My idea is to use an ESP8266.
But from what I know, the ...
- 107
0
votes
2
answers
16k
views
UART voltage on RX pin?
I bought an uart ttl to usb 2.0 adapter on ebay which I tried out yesterday with no luck. I measured all the pins and found to my surprise that the RX pin actually carries 3.3V. This can't be right as ...
- 135
1
vote
2
answers
1k
views
Convert FTDI USB signal back to serial
I have a data logger with a USB output (FTDI FT232RL) and I'm trying to get the information remotely using a XBee modem, but my problem is that I need to "convert" the USB signal back to serial to ...
- 153