OBDZero

Assists the drivers of the iMiev, CZero, and iOn electric cars

OBDZero reads, displays and stores data from the iMiev, CZero and iOn electric cars. The data such as speed and electricity use are available on the car’s CAN computer network via a Bluetooth dongle attached to the car’s OBD port. OBDZero presents this data in 12 different screens. A 13th screens logs messages between the app, the OBD dongle and the car. Six screens are intended for use while driving. These are:

• Wh shows the battery capacity in kWh and the remaining kWh

• Ah shows the battery capacity in Ah and the remaining Ah

• Volts shows the battery volts and the voltages of the highest and lowest

cells

• oC shows the average cell temperature and the temperatures of the

warmest and coldest cells

• WATTS shows the car’s average watts, speed and watt-hours per km.

• DRIVE updates the distance to the next charging station, the difference

between the remaining (aka rest) range and the distance to the station,

and suggests a speed to the station.

OBDZero can also measure the 100% capacity of the cars battery.

The app saves data in semicolon separated text files, either in the phone’s internal RAM or on an SD Card depending on how the phone is set up.

OBDZero was developed on an older phone running Android 4.3 with an INTEY OBDII an inexpensive OBD Bluetooth dongle.

The Vgate Company sent a number of their OBD dongles for testing and the results are positive. Pirate copies of Vgate dongles are sold on the Internet. Tests of a copy and a true Vgate Scan showed that the true Scan is more stable and faster than the copy. When buying a dongle that purports to be manufactured by Vgate, check that the Vgate is the supplier.

The app does not exchange data with the Internet and it does not use GPS.

There is a user manual available for download at OBDzero.dk or by writing to

I take no responsibility for any consequences of OBDZero's use.

Acknowledgements and references:

Much of the code for OBDZero comes from Blueterm by pymasde.es.

The commands to the Bluetooth dongle were found in ELM327DSH.pdf from www.elmelectronics.com

The interpretations of the CAN PIDs for speed, voltage and current etc. were found on http://myimiev.com/forum/ posted by jjlink, garygid, priusfan, plaes, dax, cristi, silasat and kiev and on on https://www.myoutlanderphev.com/forum posted by anko.

Special thanks to Anders Fanøe and Allan Korup for their advice on electric car and CAN technology.

What's New in the Latest Version 4.11

Last updated on Jun 20, 2024

Version 4.11 provides support for cars converted to the CATL NMC Lithium cell. A number of errors have also been fixed.

Introduction

OBDZero is a groundbreaking mobile application that empowers users to diagnose and monitor their vehicles' health and performance using an OBD-II adapter. OBD-II (On-Board Diagnostics, Generation II) is a standardized protocol that allows vehicles to communicate with diagnostic tools. OBDZero harnesses this technology to provide a wealth of information and features that simplify vehicle maintenance and troubleshooting.

Features and Functionality

OBDZero offers a wide range of features that cater to both casual and experienced users. These include:

* Vehicle Diagnostics: OBDZero scans the vehicle's ECU (Engine Control Unit) for trouble codes, providing detailed explanations and potential solutions.

* Real-Time Data: The app displays real-time data on various vehicle parameters, such as engine RPM, speed, coolant temperature, and fuel economy.

* Graphing and Data Logging: OBDZero allows users to graph and log data over time, helping identify patterns and potential issues.

* Emissions Testing: The app can perform emissions tests to check if the vehicle meets regulatory standards.

* Performance Monitoring: OBDZero tracks vehicle performance metrics, such as acceleration, braking, and cornering forces.

* Maintenance Reminders: The app provides customizable maintenance reminders based on the vehicle's mileage and usage.

* Community Support: OBDZero has a vibrant community of users who share tips, troubleshooting advice, and vehicle-specific information.

OBD-II Adapter

To use OBDZero, users need an OBD-II adapter that connects to the vehicle's diagnostic port. OBDZero supports a wide range of Bluetooth and Wi-Fi adapters, ensuring compatibility with most modern vehicles.

Setup and Usage

Setting up OBDZero is straightforward. Users simply install the app on their smartphone, connect the OBD-II adapter to the vehicle, and pair the two devices via Bluetooth or Wi-Fi. Once connected, OBDZero automatically retrieves vehicle information and provides a user-friendly interface for accessing all its features.

Benefits of OBDZero

OBDZero offers numerous benefits for vehicle owners, including:

* Early Problem Detection: Regular diagnostics can help identify potential issues before they become major problems, saving on costly repairs.

* Improved Vehicle Performance: By monitoring real-time data, users can optimize vehicle performance and fuel efficiency.

* Reduced Maintenance Costs: The app's maintenance reminders help prevent costly breakdowns by ensuring timely maintenance.

* Peace of Mind: Knowing the health and performance of your vehicle provides peace of mind on the road.

Conclusion

OBDZero is an indispensable tool for vehicle owners looking to take control of their vehicle's maintenance and performance. Its user-friendly interface, comprehensive features, and affordable pricing make it an excellent choice for both casual and experienced drivers. Whether you're troubleshooting a problem, tracking your vehicle's health, or simply want to optimize its performance, OBDZero is the ultimate solution.