There is a lot more great content on the HashFast blog that somehow escaped the forum's notice!
I'm pretty sure most people here have read all the blog content. Speaking of the blog doesn't the post titled, "Baby Jet Controller" directly contradict what is being said here in this forum?
On the blog it says, "The Baby Jet ships with a built in Raspberry Pi model B. This acts as the controller for the one or two GN chips in the Baby Jet. The controller talks to the chips over its internal serial port." but in recent posts on this forum company representatives are saying that each "mini-board" will communicate with the controller over USB.
So no the content of the blog hasn't escaped notice which is why I was surprised when it was said that the boards connected to the controller via USB vs. the earlier stated serial connection.
https://hashfast.com/the-baby-jet-controller/Hi pmorici,
Thanks for the question.
We made the change from serial to USB connection for the Baby Jet so that we could have the same interface for Baby Jets as for the Sierras.
USB also allows us to provide a much richer interface than a serial connection.
And finally, the "serial"/UART interface on the R-Pi is 3.3V levels. The chain connectors on the modules are 1.8V levels. Using the serial interconnection method would have required level translators. Using the USB connection requires a simple USB cable.
Cheers,
Amy
Amy Woodward
VP Engineering
HashFast Technologies