Paul & Sabrina's cheap DIY 144v motor controller

[MPaulHolmes]

Is that commands from a web browser to the controller?!

[flores]

Yes, showing the config..

Next step is changing config settings, and making the raspberry an access point so you can connect to it with a tablet of something.

Oh.. And rtd data ofcourse

[flores]

Took me 4 hours.. compiling drivers etch etc.. but the raspberry is also an access point now..

[MPaulHolmes]

What does that mean?

[Astro]

Originally Posted by MPaulHolmes

What does that mean?

Flores, correct me if i am wrong.

If the raspberryPi is setup as a wifi access point then any wifi enabled device(s) should be able to connect to it, tablets, smartphones, laptop etc.
Those devices should then be able to bring up the controllers web page as created and provided by raspberryPi.
So any features/displays that flores adds to the web page will be available to any of those devices.

The raspberryPi talks to the controller, gathers all the data.
Then builds web pages and sends them to connected devices when they request them.

Flores, will the data be logged somewhere, like maybe a mysql database. If it was then that would make it quite easy to add realtime graphs, charts and gauges to the web page. As well as providing loads of data for later analysis when we aren't actually driving the car.
The raspberryPi uses so little power that it could probably be left running (at least during recharging) so that you could connect to it from the PC in the study and check out all the data.

This sounds like a great addition to the controller project, it takes care of providing a user friendly interface for setup and display. It may also provide the ability to log the data so that we can all compare car performance/efficiency.

"Yes, yes, if you would all look at the chart you can see where i really gave it some welly and generated a quite lovely burnout for Paul to enjoy."

Of course once you add a raspberryPi to your car then you open up a plethora (love that word) of possibilities. Serving up web pages and doing some serial comms would hardly make a dent in the available computing power of the raspberryPi.
Do a google on "raspberry pi carputer" to see some of the additional things you can get the Pi to do.

[flores]

Totally correct.. and the best thing is: they only cost 25$ (and 10$ for a wifi dongle)

[flores]

Oh, and 10$ for a microSD card.. so its 45$.. but adds a lot of potential functionality.

[Astro]

Originally Posted by flores

Oh, and 10$ for a microSD card.. so its 45$.. but adds a lot of potential functionality.

I just used a cheap ($5.99) eBay wifi dongle (comfast) and an SD card i had from an old digital camera. My raspberry is the model B not the model B+ so it was just a SD card not a microSD.

I have a couple of the raspberryPi's round the house. They allow each of the tvs (xbmc) in the house to connect to the media centre PC (mythtv). I was thinking i could free up one of them to interface to the controller. But then i noticed on the model B+ they have finally added some decent mounting points. The pi's i have just hang behind the tv's by their hdmi cables. Not the sort of mounting that would be suitable in a vehicle.
Maybe i will have to splurge on one of those new fangled model B+ types.

[jedsmd]

Something is wrong.

The truck has gone from very smooth acceleration to quite rough and bumpy. It started with little dips in power a couple days ago and seems to be growing worse. I tried reloading the 8Khz software version but there was no improvement.

I think outputing the RTD curves (TR and PW) would be a good idea. Not sure how to do that.

[MPaulHolmes]

Uh oh. You can get a data stream by typing this through the serial port:

rtd-period 100

That will dump a data stream on the screen 10 times per second (100 milliseconds). It will show things like current feedback, throttle, temperature, etc... Does it start as soon as you start driving? How about in neutral? I wonder if a component is failing in the driver section. This would be very good to know about. Does it have a heat sink?