All Questions
34
questions
5
votes
3
answers
6k
views
Can I remap a car\bike ECU using CAN bus?
I am thinking to use something like this to connect an Arduino to a motorbike engine control unit (ECU): Arduino CAN-Bus Shield with uSD Card Holder.
I never did something like this; using CAN bus, ...
- 151
5
votes
1
answer
2k
views
Basic CAN-BUS circuit - what does this section do?
I'm currently learning how to make a circuit for CAN-BUS communication and came across the schematics of the Sparkfun CAN-BUS shield for Arduino (can be found here). I'm a little puzzled by this ...
5
votes
1
answer
3k
views
CAN bus bit timing with 16 MHz crystal
I'm trying to receive CAN messages from a radar, whose specification define the following data for bit timing:
...
- 51
4
votes
3
answers
4k
views
Stand alone CAN bus module or STM32 embedded CAN?
I have spent days studying and trying to achieve simple communications with CAN bus from scratch using stm32f1, but I still have not achieved the desired results and it is difficult to understand and ...
- 427
4
votes
3
answers
20k
views
CAN bus simulation (automotive purpose) - tried Arduino and SparkFun
I repair electric powered steering systems for cars, especially Fiat, Alfa, and Lancya (Delphi manufacturers), and I'm in need of making some tool to test these reparations. I mean just turning it on, ...
3
votes
1
answer
4k
views
Simple CAN bus design, communication issues
I am trying to get some simple communication between two boards that I've designed with an ATmega328P microcontroller and MCP2515/MCP2551 combination.
The design is as follows:
I have both ends ...
- 31
3
votes
2
answers
815
views
Why is there a buffer before an SD socket?
I'm studying the SD card section of an electronic circuit of Sparkfun can bus shield that I have to connect on a Nucleo STM32F411RE.
In the electriconic circuit, that you can see here.
There is a ...
- 163
2
votes
3
answers
842
views
Sending a float type values over CANBUS
I need help in sending float-type values over CANBUS.
I'm working on data acquisition of an fsae car. I'm using Teensy 4.1 and Teensy 3.5 using MCP2562 and MCP2551 CAN transceivers (respectively) to ...
- 61
2
votes
1
answer
2k
views
Rx Buffer overflow in MCP2515 CAN controller
Here is my context: I connect to automobile drivetrain CAN bus (Volkswagen Passat) and sniffer all the traffic.
The problem is that when MCP2515 got a message from CAN and I read it via SPI, the ...
- 273
2
votes
1
answer
1k
views
I can't get my ESP32 to read a CAN bus through an SN65HVD230 in real time
I am working on a project based on the ESP32 processor and Arduino framework, which communicates with another board via CANBUS protocol.
The bitrate is 125k so it is presumably "fast".
I am ...
- 41
2
votes
2
answers
3k
views
Sending a double type value over CAN Bus
I need help to send a double value using a CAN Bus.
I am working on a eletronic traction control and i need to send, by a CAN bus, the calculated values of speed of wheels. The problem start when the ...
- 23
2
votes
2
answers
160
views
Can we connect a DAQ to a micro-controller via a CAN bus?
I want to establish communication between an Arduino to a DAQ that I am using from DEWESOFT called the Dewe 43-A. The DAQ has 2 CAN bus ports according to its specs, and I was wondering if I can ...
- 65
2
votes
1
answer
5k
views
Single wire CAN // Saab 9-3 I-Bus // GMLAN
I'm trying to control an instrument cluster from a 2008 Saab 9-3. It has 2 pins marked for I-Bus (both wires are green, continuity test shows they are tied together as shown here:
Some sites also ...
- 87
1
vote
3
answers
405
views
Data exchange over 5 meter cable
I have a microcontroller which needs to communicate over a cable, which will be approx. 5m long, with another very small microcontroller. The devices will be used outdoors in various conditions. The ...
- 163
1
vote
2
answers
7k
views
Reading from CAN bus of a Chevrolet Cruze using an Arduino Uno
I'm using the Arduino Uno, CAN bus shield, and OBDII to DB9 Cable using their provided libraries. I was only able to initialize it.
Readings:
While connected to the car:
CAN-High: 2.7 V - 3.0&...
- 185