All Questions
36
questions
3
votes
2
answers
9k
views
How can we use a usb(in a laptop) for general purpose input/output operations, such as robotics control [closed]
How can we use a usb port (in a laptop) for general purpose input/output operations, such as robotics control??
I want to control an external hardware such as a robot or say simply an array of LEDs ...
- 133
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
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
3
answers
10k
views
Can I use a USB-FTDI TTL converter cable as a USB-TTL converter cable?
I have the need of a USB-TTL converter cable, but all I have is a USB-FTDI converter cable, that means I have two additional pins (RTS/CTS). If I do not connect RST/CTS pair, will the converter cable ...
- 123
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
5
answers
11k
views
Wiring Arduino Mini Pro with CP2102 USB to TTL
I have an Arduino Mini Pro and a CP2102 USB to TTL module as in the image below:
I couldn't find a suitable guide for the module I have. So, how should I wire them together?
- 249
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
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
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
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
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
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
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 ...
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
1
vote
1
answer
1k
views
GSM module working when powered by laptop via USB but keeps restarting when powered by battery
I am using a sim900 module in the following link and I connect it to my laptop using USB to TTL converter and the module works properly. But, when I connect the same module to 9V DC battery the module ...
- 13