I had an idea, looked for a solution to detect water, found the trigboard and ordered it immediately. It was mailed to me the day after and I received it (in Belgium) soon after. So happy already with the service. Being a complete nitwit in electronics I duly followed the schema on the wiki, and guess what. It works! So very happy indeed.
I moved to trigboard Ver 7 to use PushSafer rather than the version 4 Pushbullet notifications. PushSafer is German internet based service to push notifications. I find it fast and reliable. From the mailbox to actual use with the preconfigured trigboard load took 15 minutes or less. As for user configuration the version 7 trigboard is much improved over version 4.
June 5, 2019
A high quality serial converter that works very well.
This was my first time to set up such a device. The videos and documentation was more for the person who knows the development environment for Arduino type devices. Since I don't know this environment, explaining the buzz words or replacing them with easier to understand language would help. As a retired electrical engineer, I could follow the author's design well for the circuits. What I am less experienced with is the software and APPs. BTW, the PushBullet APP is run by greedy developers.