It appears there might have been some initial confusion, and we want to clarify the path forward. Our goal is to successfully output data from your tracking device, and explore how this data can be used with OBD2 systems, potentially starting with a simple display or an Arduino project.
Currently, you’re working with a tracking device that outputs data via RS232 using the UART protocol. You’ve confirmed the data output is correct using serial monitoring software. This is a crucial first step! The challenge now is to correctly interface this serial data with an Arduino, and understand how it relates to OBD2.
The technical support from your device supplier mentioned TTL levels for Arduino, while your tracker outputs RS232. This is a key point to address. RS232 and TTL (Transistor-Transistor Logic) are different serial communication standards with varying voltage levels. RS232 typically uses voltage levels of around ±12V, whereas TTL operates at 0V and 5V. Directly connecting an RS232 output to an Arduino, which expects TTL levels, can cause damage or communication issues.
To successfully connect your RS232 output to an Arduino, you’ll likely need a level converter. This device will translate the RS232 voltage levels to TTL levels that are compatible with the Arduino. Once you have the correct hardware interface, you can use Arduino’s serial communication capabilities to read and process the data from your tracking device. You can then display this data on an Arduino display, as you initially intended.
Alt text: Arduino Uno microcontroller board, a popular platform for DIY electronics projects, highlighting its serial communication pins.
Regarding OBD2, it’s important to understand that while OBD2 is a communication standard used in vehicles, it’s more complex than simple serial communication. OBD2 typically uses protocols like CAN (Controller Area Network) or K-line, which are different from basic UART serial communication. While your tracking device’s serial output is a starting point, directly feeding this serial data into an off-the-shelf OBD2 display might not work without further processing or conversion. OBD2 displays expect data formatted and transmitted according to OBD2 protocols.
Alt text: Close-up of an OBD2 port in a vehicle, showing the standard 16-pin connector used for accessing vehicle diagnostic data.
Achieving successful serial communication with your Arduino is a fundamental step. Once you have a solid grasp on reading and processing the RS232 data from your tracking device using Arduino, you’ll have a much better foundation to explore the complexities of OBD2 communication if you decide to pursue that direction. Understanding the serial data stream is crucial before attempting to interface with OBD2 systems.
We appreciate your patience and are here to support you as you navigate these technical aspects. Focusing on getting the serial data into Arduino is a practical first step towards your broader goals.
