Cancelled flight? Personal loss? First PCB design for a critical remote sensor board not working? I have had the privilege of working with many great engineers, business people and leaders throughout my career. Those who seem to have been the most successful often utter the following thoughts (perhaps through different words).
In life, we only have control over two things: our action and our attitude. So our sensor remote board is not working the way we expected? So what! We will live to fight another day. Let's invest our time and energy towards defining and isolating the problem, not by complaining about the problem. There is always a reason for why things don't work. Start by quantifying "the gap" and the start by verifying key assumptions. For example, if there is no communication, start by verifying the supply voltage, currents, start-up profile. Then, move onto to the communication signals. Are they the correct level, frequency, sequencing? Do they meet the timing requirements for the device? Do the signals look clean?
Regardless, hang in there and remember......
"No problem can withstand the assault of sustained thinking." - Voltaire (1694 - 1778), French Writer, Essayist, and Philosopher