Hi there, @jcasman!
I'm very glad to hear from you.
So, let me answer your questions:
Have you connected them to your SK-S7G2?
* Not yet, but as soon as possible, after this topic, I will.
Could you give me an explanation of what it takes, why it's useful, what kinds of Arduino shields might be useful to people with an SK-S7G2?
* I think that it would take a proper mapping of the necessary pins, and the creation of routines/interfaces to do the proper control of peripherals connected to the Shields. Also, I think that Grove Shield and Grove Sensors would be a good choice, due to their ease of usage.
* See here: https://www.seeedstudio.com/Base-Shield-V2-p-1378.html
* And here: https://www.seeedstudio.com/category/Sensor-c-52.html
* Their modules and sensors are cheap, and its usage is "plug'n play", quick to use, quick to develop, and generic - You can plug a relay, a humidity sensor and a i2c display, and use all of them.
* About the shields... Well, let's talk about the S7G2: It already have USB, microSD, Ethernet, BLE, Display, CAN, Audio, Capacitive Touch. It is a full set of powerful options
* This let us with a set of Shield Options that could be: WiFi Shield, VGA Shield, GPS Shield, Motor Shield, ZigBee Shield, etc.
* The SK-S7G2 is well suitable for IoT applications, and a set of sensors and actuators would provide test, prototype and demonstration of its capabilities.
Do you have any specific ones that you are most interested in using?
* Without any doubt, I think about start using my Grove Shield and my humble set of sensors and modules.
* I have another Shield here that could be interesting too, it is named "Tatamaya Shield" (it will be announced to public soon, but I've received a prototype), and allow to connect ZigBee, Nordic 2.4 GHz transceivers, ESP8266, HC-SR04 ultrasonic sonar, etc.
And how are Arduino shields better or worse than using the Grove shields?
* The only difference is in the "plug'n play" interface. Normally, Arduino Shields are focused in specific scenarios, like motor control, display, gaming, etc.
* With IoT in mind, the usage of Grove is more suitable, because I can plug analog and digital modules, and even devices which use i2c or uart to communicate, selecting elements of my choice.
Thanks for your attention!