EV Watchdog App for Android™
Frequently Asked Questions:
01. What do I need to run this App?
02. Which OBD2 adapter should I get and where from?
Not every OBD2 adapter on the market will work with this App.
In order to extract battery data from the interface the adapter must support a specific type of commands.
Cheap generic OBD2 adapters available are known as "chinese clones" are built with low cost electronics and most do not support the required protocol.
They are also usually slow and will normally fail with regular usage. When failing they might return erroneous data, just stop working or generate malfunction in the interface which will trigger errors in the car.
Please stick to the list of adapters listed on the website which are reported to work with the App.
Also get your adapter from a reliable source and one that you can get a replacement or refund from if needed.
03. Where do I find this OBD2 port?
For left hand drive cars, remove the plastic cover located below the dashboard on the left side of the steering wheel. There you'll find the fuses and the 16 pin OBD2 port.
For right hand drive cars, remove the plastic cover located below the dashboard on the right side of the steering wheel. There you'll find the fuses and the OBD2 port.
16 pin OBD2 port
04. Should I get a Wi-Fi or Bluetooth OBD2 adapter?
For the App the only difference is the way you configure each..
When connected to a Wi-Fi adapter you won't be able to access other data networks (mobile or Wi-Fi) from your device.
With a Bluetooth adapter this will not happen and you shouldn't have any problems using other Bluetooth accessories simultaneously as multiple connections are usually supported for most devices.
05. How do I setup this App?
Please see "Setting up the Watchdog... Step by Step".
06. How do I start sendind data to the website? (Premium Version Only)
Please see "How to sync data online... Step by Step".
07. I'm using an adapter listed as supported but I'm still having connection issues...
Assuming that your adapter is not a refurbished unit with some cheap chinese electronics clone and that it is not faulty, you might be experiencing compatibility issues.
TThe connection between the adapter and the App is handled by the Android system only, the App only uses the service provided and communicates through it.
With every manufacturer able to build its own version of the Android system the platform is rather unstable and issues between specific hardware devices are not uncommon..
Nevertheless you may want to try another third party App like Torque and see if the same happens. If it persists you could try to replace the adapter with one from another brand.
08. Got it running but don't understand all this screens...
Please see "App's screens... explained".
09. Why the speed differs from the one displayed on the dashboard?
Displayed speed on the App comes directly from the OBD2 interface (car) and is usually an estimate of the real vehicle speed. The difference from the car's speedometer is due to an introduced error.
Most speedometers have tolerances of some ±10%, mainly due to variations in tire diameter.
You can read more about this here: "Speedometer (Wikipedia)".
10. Why is the range estimation differs from the one displayed on the dashboard computer?
Range estimation of the App does not come directly from the car and has its own calculation.
App's calculation is based on the actual consumption and on the last fifty recorded trips.
11. Why is the electric consumption differs fron the one displayed on the dashboard computer?
Electric consumption of the App does not come directly from the car and has its own calculation.
App's calculation is based on monitoring the battery current in intervals of milliseconds making it very accurate.
12. Why am I seeing some current flowing out when I'm not pressing the accelerator pedal?
There is always some kind of discharge either to power the heating/cooling system or to overcome inertia.
13. Just stopped Live Data, what know? (Trips List)
All stats of the recorded sessions with a distance greater than 0 are kept in a internal database which you can access from the Trip option in the App's menu.
Please see "Trips List".
14. Does the App generates any files? If so what and where?
The App produces some files being all stored under the App's folder located inside the Download folder inside the device.
See the structure example bellow and hover a folder or file to see the description.
15. Why were the stats zeroed when I resumed driving after a stop?
There are two options to start the recording of a Trip:
"Start Live Data" creates a new session/recording which results in a single Trip card in the Trip List.
"Resume Live Data" creates a new session/recording (reason why the stats are zeroed) which will be merged with the most recent Trip in the Trip List (and consequently it will not produce a new card).
16. What's the meaning of all these colored cards in the Battery Condition and Trip Lists?
Battery Condition List:
One Green card for every change in the Battery Capacity value (State of Health or SoH) observed.
One Red card between Green cards for maximum Battery Charge (State of Charge or SoC) observed above 95% of State of Charge.
One Blue card between Green cards for minimum Battery Charge (State of Charge or SoC) observed below 30% of State of Charge.
SoC cards (Red and Blue) can be hidden with the toggle button on the upper right corner.
One Green card for every recorded trip (resumed trips will be merged on a single card).
17. Why can't I see new cards in the Battery Condition List?
Battery cards are generated only when a change is observed by the App.
Unless a change is detected no card is generated.
18. What's the meaning of the SoH?
SoH or the State of Health expresses in percentage the actual battery capacity compared to its ideal condition.
Typically, a battery SoH will be 100% at the time of delivery and will decrease over time and use.
However, manufacturers introduced an upper buffer (typically 5%) to avoid full charge to 100% which is known to impact the battery health.
Usually there is also a lower buffer to prevent discharging to 0% which is also known to reduce the battery capacity.
19. How's the Battery Capacity measured?
Although sometimes expressed in kiloWatt-hour (kWh) Battery Capacity is generally measured in Ampère-hour (Ah).
Kilo Watt/hour assumes open circuit terminal voltage to remain constant as a battery discharges and its internal resistance to be zero, both of which are not the case.
Hence the specification in Ampère/hour which is based on a discharge test.
But since when normally used the battery is never discharged to empty* (as this is generally accepted to be bad for Lithium based batteries) capacity is rather obtained through a software estimation which may be not that accurate.
* State of Charge for the Mitsubishi Outlander is generally kept above 25%.
20. What's the meaning of SoC?
SoC or the State of Charge is the actual level of charge of an electric battery relative to its capacity in percent.
21. What's the meaning of BMS?
BMS or the Battery Management System (also known as the Battery Management Unit) is the electronic system (hardware and software) that manages the battery pack by preventing it from working outside its safe operating specifications and ensures that it is maintained in proper condition.
22. Why the SoC in the Battery Screen lower than the SoC inside the Battery icon in the Main Screen?
BMS reports two types of SoC: the Display SoC (or SoC displayed) and the BMS SoC (or Battery Management System SoC).
It is believed that BMS SoC takes into account the existent upper buffer while Display SoC does not.
BMS SoC is displayed in the Battery Screen while Display SoC appears within the Battery icon in the Main Screen.
Upper buffer is around 5% hence the difference between both SoCs.