SparkFun Forums

[monkeyman40]

I just came upon the Onion Omega2+ IoT Computer and believe I want to buy as much, but I cannot find what the difference between the Expansion Docks is (since the SparkFun page doesn't provide the ability to select and compare multiple items) and which I need. I recently purchased the SparkFun Arduino Pro Mini (5V) and an Arduino Uno R3 so the Arduino Dock R2 for Onion Omega2 seems to be a must have.
But what about the Expansion Dock and/or Power Dock 2 for Onion Omega2? It seems as though the Power Dock simply provides a power input while perhaps the Expansion Dock does not. Is that correct? If I use the Arduino Dock, is there any point in buying the Power Dock (but it looks as though the Power Dock has not just a circular power plug, but also a battery connector while the Arduino unit seems not to have the battery plug)?

If so, does this sound sufficient?:
Onion Omega2+ IoT Computer - DEV-14431
Power Dock 2 for Onion Omega - DEV-14440
Arduino Dock R2 for Onion Omega - DEV-14438
Ethernet Expansion Board for Onion Omega - DEV-14441
Lithium Ion Battery - 850mAh - PRT-13854
Wall Adapter Power Supply - 5V DC 2A (Barrel Jack) - TOL-12889
OLED Expansion Board for Onion Omega - DEV-14442
Breadboard - Self-Adhesive (White) - PRT-12002
PNY 256GB PRO Elite microSDXC card (but can the Onion Omega2 handle greater than 4GB cards?).

Thank you for your assistance,
David

[monkeyman40]

Still no reply, which is surprising.
To simplify, would the following be sufficient to enable the beginning use of the Omega 2 Plus?:
1) Onion Omega2+ IoT Computer - DEV-14431 (https://www.sparkfun.com/products/14431)

2) Arduino Dock R2 for Onion Omega - DEV-14438 (https://www.sparkfun.com/products/14438)

3) Wall Adapter Power Supply - 5V DC 2A (Barrel Jack) - TOL-12889 (https://www.sparkfun.com/products/12889)