Working for over a year, we’ve been making slow but steady progress on changing the way how we fundamentally talk to the dongle. The cheap Chinese dongles are awful coping with what we call “Free Frames”, and especially the torque bars make extensive use of those. Reliability is low, delay is high and many dongles won’t work at all. Finally, since the ZE40 models came along, many dongles were overwhelmed by the busier traffic on that type’s CANbus.

We’re getting close to releasing a version of CanZE that tackles all of the above. The downside will be that we will need to drop a few fields but we regard then as rather unessential. Think of indications like cabin temperature set-point, flap open; things that are clearly visible on the dashboard anyway.

For the technically minded readers: if approved, the next version will have an alternate mode that will use only ISOTP request-response type of communications. Next to loosing mentioned fields, a ISOTP is by definition somewhat intrusive to the car compared to free frame “sniffing”. This is academical though.

We will encourage all users using and ELM327 type of dongle, such as the KONNWEI902, to try switching on “Use ISOTP fields” in the settings; things might improve significantly. For those who have build or want to build an CanSee dongle, we suggest to keep using free frames. It will beat the ELM dongles in speed hands down. After feedback, we might automate the switch based on dongle type.

Stay tuned, all coding is done and we’re now testing.

Edit: As silly cheap dongles sometimes have no secure Bluetooth capabilities, CanZE switches to an insecure Bluetooth connection when “Use ISOTP fields” mode is switched on.

The Tire IDs (and pressures) are conveniently labeled Front Left, Front Right, etcetera, but the car has no separate receivers for the individual wheels. It just sees four values coming in and checks it. Enough for the warning light, but not for us users. We want to make sure the pressure is stated for the correct wheel, and the ID for the correct wheel is displayed.

We’re in a pickle a bit as we received a report that the Rear IDs in CanZE are swapped, while we have followed available documentation. As none of the developers have a TPMS equipped car, it’s impossible to experiment. So in case you are a “tire guy” with a TPMS equipped ZOE, please do some experiments and confirm (or deny) said report. Thanks!

In the next release we plan to introduce dark mode for Android 9 and 10 devices. It will have a dark, light and System (as in, follow what Android does) mode.

Until now, we’ve been keeping CanZE compatible with API level 15, meaning Android 4.0.3. For reference, we’re talking Samsung S2 era, early 2012 phones. To make dark mode work without over-complicating the code, we have to let go of supporting Android 4 and make API level 21 the minimum requirement. These are late 2014/early 2015 phones. The number of active users below API level 21 is approximately 2.5% of the active users, so we feel this is a fair compromise.

The sun-setting of Android 4 support has been announced starting today in the news bar. If you run CanZE on an Android 4 device it will no longer receive updates, but it will still run the older versions.