Metr Pro Updates

[xsynatic]

Modes with Expert additions

You can add wide range of expert parameters to modes.
Suggested by @Skatardude10

Yo, where is my shoutout. I asked for that 25 days ago

Metr pro is still one of my favourite investments so far.

I already talked about this but i still wish for customization in the Modes tab.

So we can create our own Mode that could also directly change the Cutoff Voltage for example (in my case swapping between 10s and 12s regularly)

Or everything you can find in expert etc.

Also, sick update! Can’t live without metro pro anymore!

EDIT: appreciate it

[rpasichnyk]

where is my shoutout

Fixed, thanks! Short memory

[Jezza]

That looks awesome! Well Done.
@rpasichnyk would it be possible to add a voice-note (voice to text) that goes into the logs and shows on the graphs. This would be pretty handy to add a note about conditions when testing and riding etc.

[xsynatic]

Another thing. Due to the bug from last time, i’m still in the Play store Beta program. Should i leave it before i download the update or is it not necessary?

[stan]

I was literally waiting for this sale for so long!
I tracked back to last year’s Black Friday and saw that you did one the week before it. So I was refreshing that page all that time to see if you would do one again this year.

[Skatardude10]

OMFG SO AWESOME @rpasichnyk!! Thank you so much!!! Man, you work quick… even though I may not ride tonight I am super pumped to start making some super custom modes, probably right now

And the discharge feature is awesome! I’ll be using that this winter a bit for sure, no more full charge the night before and getting unexpected snow for a week and worrying about sitting on a board with a full charge… mmmmm YES!!!

[Skatardude10]

Is the update live on the play store?

[hexakopter]

Looks like it is pushed and should be available pretty soon.

[Slak]

No, safety first. But you can always hack around by using Terminal

Then we need a tutorial on adding those sensors to motors !

No harm to the battery when discharging at a very low current for a long time ? And what is the max discharge current we can use (or how to calculate it so we can know how long it will take for your own batteries) ?

Thanks guy for this awesome feature ! Gonna buy another module to help your business.

[Tangent]

DISCHARGER

This is a killer feature, brilliant, can’t wait to try this out, no more sitting on a full pack remorse.

[Wisp]

Epic!

[rpasichnyk]

a voice-note (voice to text) that goes into the logs

This is interesting, thanks for the idea. However the feature needs a lot of time so probably won’t be coming soon.

@xsynatic you can leave the beta program if you don’t want to be the first getting updates

No harm to the battery when discharging at a very low current for a long time ? And what is the max discharge current we can use (or how to calculate it so we can know how long it will take for your own batteries) ?

The recommended motor current is 15A. This results in about 0.5A battery current in my setup. You can start from there and tweak depending on your motors. Discharger feature is still experimental and you need to pay attention while using it. The app will not allow you to use motor current higher than 30A. It will also stop discharging if motor temp reaches 60C or VESC temp reaches 70C

You will see Wh value increasing on the discharge screen. By observing that value over time you can estimate how long it would take to discharge your battery.

[rpasichnyk]

The update is now out in the stores!
There was one more thing included

DieBieMS expert configuration😎

[xsynatic]

@xsynatic you can leave the beta program if you don’t want to be the first getting updates

Just wanted to make sure i don’t get unstable beta updates. If it means i’m early then i’m staying haha

[Skatardude10]

Hey Roman, I’m having some issues with the latest update. I am running Acks and he has some custom PPM control modes other than default. These PPM modes read and write correctly on Expert settings mode:

In the modes section I can write settings adequately, but if I read and then write I get a timeout during app configuration write…

… and the PPM control modes listed in the modes screen seem to be different:

I thought maybe if I don’t add an advanced setting that it won’t read or apply that particular setting, but it seems to try to read and write all these settings in the background… setting values are already populated when adding, and writing any mode after reading presumably tries to apply all these values causing the app write timeout (maybe because it’s trying to change to a mismatched PPM control mode for me?)

Are these settings a static list of variables separate from the expert settings variables? Would it be possible to query the installed vesc firmware for a list of additional variables (like how the expert settings pane seems to do)?

Would it be possible to only read/write only the settings added to the modes screen?

Just spit-balling, let me know if I am hitting somewhere on the dart board or if I’m hitting the wall… I am only guessing how the app is working based off my observations.

Thanks for the help!

[xsynatic]

Keeping an eye on that. I’m running Ack too. Haven’t updated yet.

[rpasichnyk]

This is how changing mode works:

1. Metr app reads motor / app configuration from VESC
2. Changes ONLY those values specified in the mode screen and ONLY if they are present in motor / app configuration. Older firmwares do not have app_ppm_conf_smart_rev_ramp_time for example
3. Writes back motor / app configuration

It might feel a little slow, because there are no incremental command to change only some part of configuration. Currently whole motor / app configuration must be fetched / sent every time.

Thanks for detailed explanation, I figured it out. The issue happened because there are differences between official and Ackmaniacs firmwares. For Modes I just took latest from FW 3.62. And it doesn’t match with ackmaniacs FW 3.100+

In fact, the parameter you are interested in shares the same name app_ppm_conf_ctrl_type with a different set of values:

3.62
"Off;Current;Current No Reverse;Current No Reverse With Brake;Duty Cycle;Duty Cycle No Reverse;PID Speed Control;PID Speed Control No Reverse;Current Hyst Reverse With Brake;Current Smart Reverse"

3.100+
"Off;Current;Current No Reverse;Current No Reverse With Brake;Duty Cycle;Duty Cycle No Reverse;PID Speed Control;PID Speed Control No Reverse;PID Speed Control No Acceleration;Cruise Control Via Slave"

This is a problem because these values serialize into a number and sent to VESC when applying configuration. So you might think you are applying Current Hyst Reverse With Brake, but if you are using Ackmaniacs FW, it will be PID Speed Control No Acceleration

I renamed this parameter (and some others), they are now prefixed with ack_. Maybe I will come up with a different solution later, but I always keep in mind that Metr app should work with all firmware versions and modes can be shared.

I pushed a new version v4.1.1 to Google Play Store, it should be available soon, please give it a try!

[Arzamenable]

Hot damn, metr is the gift that keeps on giving.

[esk8manbabes]

Just tried this and it works for a little while until my phone screen goes off and it stops. When I use the normal metr live view my screen stays on.

Second thing I run into is my diebiems has auto off enabled. This discharge function doesn’t seem to overrule this.

iPhone 7 by the way.

[rpasichnyk]

That’s normal your screen goes off. The app still runs in the background as long as there is bluetooth connection. Discharge consumes about 0.5A battery current. DieBieMS has “Not used current threshold=1A” by default. That’s why it stops. I recommend changing it to 0.3A. What DieBieMS firmware version do you have?