Hi,
Recently, I bought an A4WD3 meccanum rover - has anyone assembled this kit?
Looking at the online-doc and the parts delivered more closely it noticed several things:
- There is no code for remote control available. In the kit there is no rc controller but I plan to use the RadioLink T8S.
- In the doc there is an illustration that a Raspberry Pi can be installed in the A4WD3’s body, instead of the provided BotBarduino - any code how to make this work?
- While the motors provided have encoders installed, the provided BotBoarduino seems not be capable to handle four inputs. Any idea how to handle this issue - I imagine on a meccanum wheel rover, the encoder feedback from the wheels is important for a precise steering…
thx for any thoughts on these issues!
Mr. @cbenson may be able to give you some guidelines.
Hi rasc1234
Thanks for purchasing our Lynxmotion A4WD3 platform.
I’ll try to help with your questions:
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We do have a sample code for RC control available. Take a look at the “Setup” page of the guide. It’s a basic code that use the RC controller in PPM output and gives full mixed control without encoder reading.
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We’ve made the mounting plate compatible with the Raspberry Pi mounting holes but no code have been developed. You may find a lot of examples online that can be used. The first thing to consider is connecting the two motor controllers to the Pi and since the Pi do not have many I/O pins and is running on 3.3v for most of them you might want to go Serial. (Sabertooth support: Analog, R/C, simplified serial, packetized serial)
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It greatly depends on your application, needs and capability in coding. We decided to include the BotBoarduino in our kits as it’s a simple Arduino controller and has quite a few I/Os break down and can run the A4WD3 configurations.
We haven’t tested this but there are libraries out there (like THIS one) that can help with the Encoders.
All the best,
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Thank you for the fast reply - I will check out these clues
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