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@ramaker said in Drive 4 DC motors without encoder - NO LEGO:

@ajb2k3:
I have the original LGO cables too - cutting and crimping would be an option. But I found that the crimping tool is expensive and crimping that lot of cables is "not an exciting job" - and I have to buy all the LEGO cable and throw away one connector.
Woud be ok for 1 or 4 cables but not for 200pcs up.
(I have to take care, that the costs for our clients should be very low - we are private people without sponsoring.)

I looked at the JPL mars rover and think it should be easy to make.
I will redesign the main mechanical parts, so that I can use 3D-printed parts, for the weel-drive-motors I'll design my standart motors. (wthout decoder) and for steering I'll design medium servos. This combination works perfect for vehicles in that size. In this design 2 DC motor drivers and 4 servos will work. So I can use the GoPlus2 module.
The plastic parts have a simple design, so I can use them for my training.

As far as I guess a M5Stack in the "face display" would be easy to include and the display would look good.
So the complete control unit will be the M5Stack Core2 and the GoPlus2 - very compact.

I'll make one side of the rocker bogie suspension and will simulate it.

regards
K.D.

200+?
For that quantity you should invest in the tool!
I used to use a pair of needle nose pliers to crimp 2.54mm pins and i broke loads (still break them even with the tool)
The connectors are on ebay and LCSC

I've tried asking for the firmware for the go unit but they say it not reprogrammable.

@titimoby said in [M5Paper] UiFlow support:

That's very nice to be able to use UIFlow with M5Paper, thanks. 🥰

This also open the door to micropython.
I tried it and it works in UIflow.

Now, I'm trying to figure out how to add libraries.
With M5 core, I use either thonny or rshell.
But I could not connect to M5Paper with those.

The only tool that worked was Mu editor, but only to see the REPL. Could not access files.

Is there a trick to upload files on M5Paper?

Yes, there is a trick but alas i forget the trick and struggle to upload.
I'm using thonny and its hit and miss accessing the paper.

@ramaker I brought the official m5stack lego cables and chopped them up for the terminated ends.

Sorry, brain fried at moment and will need to clear brain and think on it.

@powersoft said in M5Paper I2C:

Today I rewrote the routines for the BMP280 and BME280 for a single device.
Simple include the source into the main program, and call it.
This is now working as I wont. It takes a afternoon of work!
Now put the finishing touches on the BMP280/BME280.

Would it make sense to post them on the forum when they are ready?

Cheers
Jan

Hi @Powersoft sorry for the absence, ive had some issues to deal with.
nice work finding the issue.
Create a project in the project forum and post your code and solution in there.

@powersoft said in M5Paper I2C:

Today I rewrote the routines for the BMP280 and BME280 for a single device.
Simple include the source into the main program, and call it.
This is now working as I wont. It takes a afternoon of work!
Now put the finishing touches on the BMP280/BME280.

Would it make sense to post them on the forum when they are ready?

Cheers
Jan

Hi @Powersoft sorry for the absence, ive had some issues to deal with.
nice work finding the issue.
Create a project in the project forum and post your code and solution in there.

@ramaker Sorry, wasn't aware you already had the hardware, I just presumed you were planning.

These are the pre-terminated leads https://m5stack.com/collections/m5-accessory/products/m5stack-lego-motor-adapter-cable

Please give me a day or 2 to find the connectors but they are crimp connectors and available on ebay and other suppliers.
Edit - They are JST 6 pin connections
@ramaker have you been looking at JPL's Open mars rover project?
I would be interested in a collaberation as I too was looking into it.

oserror 118 is an issue with Micropython. from what i can tell, its an issue baffling the main MP devs.

Ahh, I'm not sure about arduino as I'm working on documenting UIFlow.

When you install UIFlow and finish setting up the wifi, the API key will be displayed on the screen along with the mode and the network you have connected the device to.

What code are you using for the scanner?
Just run a test on mine using this code

And getting a working scan.