Zarduino Land
I came very late to the party, only becoming aware of the Arduino phenomenon in mid-2011. There seem to be nearly as many Arduino compatibles, copy-cats, clones and clowns as there are Linux distributions. So, here are my contributions to the chaos.
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Arduino compatible system boards
Being 70 years old and with health that has gone so far south that it is locked in Antarctic ice, I am reluctant to undertake learning another computer language. For READ (Rapid Embedded Application Development) I have long preferred ZBasic which, at least at the chip level, was Arduino-ish before there was Arduino. So, I designed Arduino compatible system boards for some ZBasic chips in order that I and other ZBasic users can have easy access to the myriad of shields developed for the Arduino. Since ZBasic also uses Atmel AVR chips (with a proprietary serial bootloader), it was fairly simple to make my Zarduino system boards pin-compatible with Arduino with the exception of the 40-pin system boards which are mostly pin-compatible except for the 12 extra pins. On 28-pin systems A4 and A5 are also SDA and SCL; on 40-pin systems, SDA and SDA occupy those positions with A4 and A5 moved to a header that only exists on 40-pin systems. NOTE: The YourDuino Mega1280 and YourDuino Mega2560 are not my designs but are included below because we plan to port roZetta to them.
Here's an overview of the roZetta/Zarduino stack.
Note that not all features of the various system boards and shields will be available for roZetta. Some are included so that Arduino aficionados and others might make use of them when creating their own applications to use the hardware. Some may later be supported for roZetta. For example, if PureBasic adds USB functions that work in Windows, Linux & OSX, I can add USB Peripheral support. roZetta users should ask beforehand about specific features not covered in the roZetta User Manual. I do plan an Android app that will allow command and control via WiFi and Bluetooth.