UPDATE on Subject #1.
I offer this to assist others who are interested in using the Light Chaser Skill.
I was able to match the pin outs on the TSL-2561 Module that I purchased with those on HEXA’s Hardware Interface (my Module is 3V). After installing the Module and Powering ON, the Light Chaser App opened and my HEXA now seeks out and moves towards bright light sources.
To make this easier, I have attached an enlarged image of my TSL-2561 Module (bottom of PCB where the silkscreen pin out labels are) with the proper wiring to the HEXA. The Module is only 18 X 14mm. I also included a separate color coded HEXA Hardware Interface diagram to assist to identify proper Dupont wire connections…
I still require assistance with #2 and #3 and I’ll add a #4 Rock and Run which also does not load.