Questions tagged [obd]
OBD means "On-Board-Diagnostics" for motor vehicles. Originally proprietary, there are now standards such as OBD-II and EOBD which define the connectors, electrical signalling systems and a standard set of messages.
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Hooking up a device which is powered externally, to the OBD port of a car
I have a device called AutoPi (https://www.autopi.io) which is simply a Raspberry Pi Zero aggregated with a couple of more components.
The device takes it's power from the OBD port.
I want to make ...
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Selection criteria for microcontroller to read data from a car's CAN bus (from OBD2 to microcontroller)
I want to read data from a car's CAN bus using a micro-controller. The micro-controller is used outside the car (via OBD to micro-controller).
A few micro-controllers i found with CAN interfaces are ...
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CAN BUS Termination Resistors For CAN Logger Device
I am making a CAN logger device that will be connected to the vehicle OBD port. Since the CAN bus inside the vehicle is already terminated, do I need to terminate the BUS lines on my device end, right ...
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STN1110 LED1 keep flashing rapidly
I did a pcb mount for a stn1110 "Multiprotocol OBD to UART Interpreter" and followed exactly schematic from datasheet.
The issue I have is that after is starting, there is a sequence of flashing the ...
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I am trying to make a OBD logger for heavy-duty vehicles
The thing is that I have to use one CAN transceiver and one CAN controller. Both have one interface (CANH and CANL). I use dip switches to route different CAN signals whenever I need to using a DIP ...
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Identify rx/tx on an elm327 bluetooth adapter
Can you please help me to identify Rx / Tx pins of this OBD adapter in order to connect to it using an Arduino?
I did that once with other adapter that looks the same on outside but different in ...
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CAN Bus sniffing
I am CE major prototyping embedded hardware to read and send data via the CAN bus. The design is coupled with a GSM/GPS module to enable tracking. I needed an EE perspective on the schematic diagram (...
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OBDII Car-Hacking
Can I implement an OBD-II scanner using an ATMEGA328P in place of the ELM 327? Preferably read some diagnostics code and upload that data to a web app via mqtt using GSM module.
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Getting garbage output in serial monitor while communicating with OBD using CAN interface (MCP2515) and nodemcu
I am doing a project which involves getting vehicle speed from a car's OBD port and storing it in my database using nodemcu.
I am programming nodemcu using the Arduino IDE and using this library for ...
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Female OBD2 Connector
Does anyone know what's this exact connector:
I got it from here, but I lost these metal connectors, and I was hoping to find them at DigiKey or similar sites, but the one that I was able to find is ...
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How to set timeout using AT commands and ELM327
I'm working on Android app that can read data from CAN bus. The interface I'm using is ELM327. The problem is that this interface uses Bluetooth, so I cannot read all the data from CAN bus because ...
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transistor or an SSR Relay as a Switch ? PCB
i want to create a switch that will turn on/off the power to my OBD Port on my car when i turn engine on/off. reason being i have an OBD wifi dondle plugged in all the time. problem is the OBD Port ...
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Firmware design for OBD2 - available PIDs request to ECU
According to many documentations, we can request a vehicle ECU to respond with the PIDs it supports. Link.My question is in the end.
I have designed an OBD2 scanner using STM32 and CAN. And it works ...
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Help with ISO 14230 K-Line initialisation
I have an OBD-II scanner hardware built using STM32 and it is working fine with most vehicles.But I'm facing difficulty with ISO 14320 K-Line fast.
Even though the firmware works fine when tested ...
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Setup for logging/displaying what command an OBD scan tool sends
I came across this video: youtube.com/watch?v=VtMvccqE8ks
Any idea/resources how to build this setup? I am not much interested in monitoring the CAN bus for commands (headers or CAN IDs) of power ...
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