v2.2 vs v3.0
If not specified, most megasquirt ecu’s offered for sale use the older v2.2 mainboard. This is because of the lower cost and assembly time due to the basic feature set.
|Separate signal/power ground planes||No||Yes|
|5v vref re-settable polyfuses||No||Yes|
|Injector outputs||2 x high impedance||2 x high/low impedance|
|VR conditioner circuit||No||Yes|
|Coil driver circuit||No||Yes|
|Bluetooth device support||No||Yes|
|FP/idle overcurrent protection||No||Yes|
The V2.2 is the simplest and cheapest option but is technically obsolete and does not include the VR conditioner or low-z support. The V3.57 is a pre-assembled version of the V3.0.