While let's encrypt is great when compared to not having anything.
There are conveniences ~$150 per year buys you with an okay wildcard certificate. Certificates being valid for a span of years... Free revocation and reissue all day every day (versus a few times in a week). ...wild card subdomain support, you don't need a new cert if you roll out a new host on newhost.domain.com . Tech support tickets.
The conveniences and stability a paid SSL solution provides are likely more attractive to onion.io than saving $150. What is time worth? You have more of it if you are not dicking around with a certificate with more points of failure-- I know that. And I say that as a fan and supporter of Let's Encrypt. They are doing great things over there and have no reservations against someone using a Let's Encrypt cert-- when it makes sense to.
Looks good, Thanks for sharing! I tested out your code on one of my original Omega, and was also having issues with running out of space. When I have some time I'll try again with my Omega2+ and add more space with an SD card.
I've been too busy with work to get anywhere with my own project, but am looking for the best way to add server-side functionality to this project. It would be great to be able to change the setpoint, show last off time, and set minimum off time. Any suggestions on the best way to do this? I'm trying to learn more about PHP, and also looking at node.js.
Once I have an Omega controlling my draft cooler, my goal is to replace the arduino controlling my brewery now. Hopefully I will be far enough along with that project to have something worth sharing in a couple more weeks.