All Questions
Tagged with serial serial-bus
36
questions
2
votes
3
answers
1k
views
What causes a digital signal to look like this?
I’m reverse engineering an existing microprocessor to microprocessor serial signal. When I put my scope on the target device I see the clock and data lines just fine on my scope when I connect it to ...
- 31
4
votes
4
answers
2k
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Can I test if a MODBUS server device is active?
We have a device which has a RS485 Modbus connection. This device supposedly acts as a server on the bus.
We are in a position where it is not clear if the Modbus feature is even turned on or active. ...
- 89
0
votes
2
answers
1k
views
What communication protocols are used with mobile displays?
I have been researching the communication protocols used between the motherboard/processor of touch screens used in phones and smart watches for a while, but I couldn't find much.
Generally, ...
1
vote
1
answer
210
views
Raspberry PI4 and RS232 adapter cable: how to send serial commands
I would like to use a Raspberry Pi4 to control a syringe pump [(see datasheet here and in particular the quick start manual on page1)][1]
The connector cables I used are RJ11 from the Pump to RS232 (...
- 377
0
votes
4
answers
908
views
How are "async/sync" and "serial/parallel" communications related?
I think "async/sync" and "serial/parallel" are orthogonal concepts. There can be 4 combinations of communication types:
async serial
sync serial
async parallel
sync parallel
From ...
- 1,192
2
votes
2
answers
129
views
Detect LOW signal in a two-way IO line that's HIGH when idle
I am trying to implement the ISO 7816-3 protocol as can be found in the EMV Co. Book 1 using an ESP32 and MicroPython. However, I noticed that the default state of the I/O line is HIGH, and there's ...
- 121
0
votes
3
answers
120
views
"<ret>" meaning?
I'm attempting to use multicharacter serial commands in this manual (page 18 in the pdf, 16 in the manual), but can't get them to work. When I'm trying to use the "GX " command to move to, ...
- 101
0
votes
0
answers
298
views
How to record RS-485 Modbus communication at PC?
I am working on a system with an IPC, RS-485 Modbus communication, and 15 Toyo step motors and drivers. A motor frequently moves without IPC intentionally sending moving instruction and causes a ...
- 169
1
vote
1
answer
667
views
Unable to install MCP2221 Driver on Win10 64bit OS
I use this PIC32MZEF board - https://www.microchip.com/DevelopmentTools/ProductDetails/dm320007. It needs MCP2221 driver tobe installed for UART communication with PC.
I downloaded from official ...
- 83
1
vote
2
answers
167
views
Unable to upload anything to Arduino Uno
Any time I try up upload a sketch to my Arduino, I get the following error message:
That "1 of 10" then repeats all 10 times, and ultimately fails. I know that this board works, as I am ...
4
votes
2
answers
551
views
What was the communication protocol used on board the Apollo moon lander?
It seems that the development of TTL was contemporary ~1961 the maiden moon landing of the Apollo vehicle, while the development of one of the oldest digital signalling standards RS232 using the UART ...
- 265
0
votes
1
answer
192
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I2C: How does the Master recognize an ACK from a specific slave?
I just started learning about serial communication protocols. So I understand there are only two lines connecting a master and many slaves
Master broadcasts the start condition then the slave address ...
- 521
0
votes
0
answers
95
views
Serial communication protocols used in spacecrafts and airplanes
I always see that CAN bus is used in automobiles for communication between nodes and for on board diagnostics and basically for the overall functioning of vehicle. What are the similar serial ...
1
vote
1
answer
569
views
UART permissible cable length
I am communicating between two esp32's. Can the UART at a baudrate of 512000, work fine over a distance of 1 metre? . The data will be sent at 10ms intervals. Wires are standard 24 awg.
1
vote
3
answers
540
views
How would you combine DC power, bi-directional serial data, and an RF signal on a single 50-Ohm coax feedline?
I would like to power a remote device and communicate with it over some serial protocol on the far-end of a 50-Ohm coax feedline (RS232, i2c, SPI, etc), while at the same time sending/receiving an RF ...
- 2,098