All Questions
37
questions
3
votes
1
answer
145
views
UART communications using CAN bus differential signalling
I need to interface with a device that talks UART, but with CAN bus signalling. Here's a picture where a tester (which I want to replicate) talked to that device:
While RS485 seems similar, the ...
- 175
0
votes
2
answers
80
views
RS485 to CAN converter
I want to design where a RS485 Device Sensor reads inputs and the information it reads and sends is converted to CAN (Arduino UNO R4 Minima with CAN built in, or ESP32 with CAN built in)
Is this ...
- 21.2k
4
votes
4
answers
399
views
What technology to use with multiple embedded systems talking to each other?
I am planning on building a system with one master and multiple slaves using MSP430 microcontrollers. The microcontrollers must talk with each other with serial interface using RS-485. I now need to ...
- 23.2k
0
votes
1
answer
111
views
RS485 to CAN transceiver converter
I am using an ESP32 that has a CAN transceiver on it. I want to be able to communicate with an RS485 device.
Below is a block diagram of the high-level schematic for this:
Can someone assist with ...
- 9,270
0
votes
1
answer
1k
views
CAN Bus with RS485 CAN HAT for Raspberry PI
I have set up a CAN bus between 2 STM32 Nucleo's, where one is only sending messages and the other one is only reading them. This works, I have also validated this by connecting them to another CAN ...
CommunityBot
- 1
15
votes
2
answers
25k
views
Significant differences between CAN and RS485 regarding the physical layer
In comparing the physical layer of CAN and RS485, I am trying to find the advantages of either one over the other. I found out that they are quite similar. Both are good in terms of common mode ...
- 1
1
vote
1
answer
673
views
Using CAN with Teensy 4.1 is better than using RS-485 which requires extra converter?
I am using Teensy 4.1 and need to communicate with motor driver which supports CAN and RS-485.
In teeny4.1 CAN is supported yet it requires CAN transceiver whereas if I want to use RS-485 I need to ...
- 159k
3
votes
2
answers
829
views
CAT6 for both RS485 and CAN in same cable
I have two devices which need to talk to two controllers about 60m away in the garden.One uses RS485 and one uses CAN.
I have to run armoured CAT6 for this and wondering if I can use the same run for ...
- 17.9k
3
votes
2
answers
1k
views
Alternatives to CAN for multi-master transmission
As usual these days I'm fighting against component shortage. As in completely redesigning boards since they give us lead times in the 2023 years.
At the moment I have this product line where the ...
0
votes
1
answer
6k
views
Modbus Vs CANopen - Which one should I choose?
Modbus Vs CANopen - Which one should I choose if I want:
Broadcast to all units
Talk to specific units
Robust
Send lots of data
Implement for embedded systems
Easy to use
Using in new projects with ...
- 21.2k
8
votes
4
answers
3k
views
Why common-mode choke on differential-signal serial lines?
I have 2 questions:
Why using a common-mode choke on serial communication lines (like CAN, RS485) if the signal is differential? Wouldn't the common-mode noise simply be cancelled in the receiver?
I ...
- 55.1k
0
votes
1
answer
689
views
Help in deciding between RS485 or CAN [closed]
PROBLEM
I'm building a robot control board to attach to a Raspberry Pi as an hobby. I like to have specialized boards for various functions, and I'm exploring solutions for the communication bus. In ...
2
votes
1
answer
4k
views
Can RS485 be considered a multi-master bus?
There are some electrical specifications specifically designed for multi-master protocols such as CAN, I2C, 1-Wire, etc. which are classified under CSMA/CD networks.
However, RS485 has a push pull ...
0
votes
2
answers
1k
views
Star configuration using CAN Bus, I2C or RS485
I need to create a sensor network, with a central node receiving data from +10 different nodes, each one +20meters from the central node. So basically I need to create a star configuration, with a ...
- 21.2k
0
votes
1
answer
137
views
Bus communication scheme for large number of devices (255+ nodes)?
I'm trying to figure out the feasibility of setting up some type of differential bus communication for up to 400 devices outdoors. The main constraints are mainly power consumption, complexity, wire ...
- 55.1k