Is it possible, instead of using a MightyBoost paired with Moteino, to use MightyBoost with ATXRaspi? Essentially I'm wondering if it is possible to do this:
power in > MightyBoost > ATXRaspi > Ras Pi
Would this work? Would there be any issues with this?
I haven't tried it but it should work. You would then jumper the 5V* output to always be ON and feed it into the ATXRaspi input. The button would be wired to ATXRaspi directly and power the Pi from ATXRaspi output.
The downside is it would cost a dollar or two more and it would take more space in your enclosure (if any is used).
Excellent, that's what I was hoping. Since the ATXRaspi looks to be an easy setup, I'm leaning towards this approach for ease of development (because I'm pretty new to the electronics building scene). Thanks for the quick response!
Yeah definitely, the ATXRaspi is a standalone board that has the shutdown (and coming soon - reboot!) feature, all it needs is a power source, 2 GPIO connections to the Pi and a script installation. The firmware is loaded and there's nothing else to do. To make Mboost act like an ATXRaspi you would need to stack a barebones Moteino on it and load it with the MightyBoost control sketch (https://github.com/LowPowerLab/RFM69/blob/master/Examples/MightyBoostControl/MightyBoostControl.ino).