All Questions
96
questions
0
votes
2
answers
105
views
Why does RS-232 Communication fail between these 3 ESP32's?
What's the Goal?
Trying to get two esp32's to communicate over their UART lines using RS-232.
My initial inspiration and idea for the connections was based on
https://esp32io.com/tutorials/esp32-rs232
...
- 117
0
votes
1
answer
84
views
Convert RS232 signal to USB
I have an optical amplifier that uses RS232 and I want to convert to USB. I've purchased this chip, also here. There is little documentation on this chip and the supplier hasn't responded to questions....
- 103
0
votes
2
answers
359
views
STM32 UART without HAL library
I am writing register level code for STM32F4 & in my code there is a timer for calculation of the frequency of an input signal.
I am trying to implement a UART for sending calculated data to ...
- 27
0
votes
0
answers
109
views
Ethernet to UART (or RS232) conversion
For the PCB I'm designing, I need serial communication (1.8V UART, 3.3V UART, 5V UART or RS232, whichever is easiest) from an Ethernet connection (the devices connected to the Ethernet network will ...
- 7,697
1
vote
2
answers
412
views
Is it okay to call a UART “RS-232�� if it doesn’t respect voltage levels specified in the RS-232 standard?
I have been using this converter call it converter A to communicate an MCU through its UART pins RX TX. And I wouldn't call this RS232 because RS232 is about physical layer and voltage levels as ...
- 1,468
1
vote
0
answers
157
views
PIC16F UART Receives only the first byte
I'm currently working on a PIC16F18855, I'm trying to set up the communication part.
My setup is as follows:
A PCB connected to my computer via a TTL232 cable.
The PIC16F18855 is clocked at 32Mhz, the ...
- 41
0
votes
1
answer
231
views
Why does the data observed on a UART/RS232 bus look different between a logic analyzer and an STM32 Debugger?
I'm trying to communicate with a BNO055 using an STM32L552ZET6Q microcontroller via UART. The BNO055 is on a separate board, and connected to the STM32 via a 1.5M cable. Additionally, there are ...
- 349
0
votes
1
answer
598
views
Capturing serial output from PuTTY
I have a microcontroller set up to capture serial data via RS-232 so that I can debug directly and view registers, variables, etc. I am using PuTTY through a USB to RS-232 converter to send data to it ...
- 129
0
votes
2
answers
890
views
Is it possible to transmit/receive 16 bits in single symbol with the UART?
In the "Universal Serial Bus Class Definitions for Communications Devices" document there is the "Class-Specific Request Codes" table. In this table there is the GET_LINE_CODING ...
- 2,247
4
votes
4
answers
1k
views
Can a PC side software detect that a com-port receive a single stop-bit instead of double stop-bit? [closed]
Let's say we set the com-port settings on the PC side with double stop-bit. And then we set the com-port settings on the device side with single stop-bit.
Can we detect stop-bits mismatching with ...
- 2,247
-1
votes
3
answers
669
views
Which MAX3232 IC's for simple UART to RS232 converter?
I am trying make a TTL to RS232 converter.
I have designed my PCB for 16 pin SMD sop16 and max3232 CSE+. But when I was buying from a store (store link), I saw other types of max3232. I've bought and ...
- 1,139
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
0
votes
1
answer
3k
views
How to use MAX3232 RS232 to UART converter with ESP32
I want to use max3232 IC with ESP32 to connect Topway HMI display. I decided to use ESP32's RX2 and TX2 pins to connect max3232. So I've tried to make this circuit (from here) for my PCB. But ...
- 1,139
2
votes
1
answer
140
views
Can you identify this digital signal? It looks like a UART signal and can't figure out the baud rate
I'm trying to read the signal between my quadcopter's camera board that is controlled by an android app, and the rotor control board in the drone.
There are two boards in the drone: the camera board, ...
- 2,088
1
vote
2
answers
105
views
