I reached what I think was the third day. There was a connection problem with the tank and three lit green diodes, which I resolved. Then it says there are two lit red diodes, which means create figure 5 from the grid annex, but I did that and it didn't work. I tried the response for two flashing red diodes just in case, mixing up terafitunol (misspelled as terafinutol in the manual by the way), which I'm pretty sure I did correctly, but still no response. I'm stuck and can't figure out how to proceed.
Oh, I finally noticed the little triangle arrow indicating the grid orientation. That's so sneaky. Just like how the wire configurations don't go in order past the first time. I'm glad I was able to figure it out, but it's a shame that if you're missing something, there's no real way to get unstuck.
I enjoyed the game, but it is kind of lacking the excitement of collaborating with another person like in "Keep Talking & Nobody Explodes." This game basically just has you take on both roles of that game, which misses a key part of the appeal. It's still nice for what it is, though.