Computing Life

I have been a happy user of DigitalOcean for more than 5 years now. But got two accidents in the past month. One for the machine being powered down for no reason. Talked with the support but we couldn't find anything, no operations from DO backend, also no log from …

Bought a camera (Leica SL) recently, and spent some time (and money) on some old Leica R lenses. One is 60mm f/2.8 macro with 1:1 adapter, one is 400mm f/6.8. I found both of them can be pretty good at …

Indoor air can be much more polluted than the outdoor air. There are some "smart air purifier" like Dyson Air Purifier on the market, but they are usually very pricey, and lack APIs for customization. That's why I used a Raspberry Pi to build a smart air monitoring system, which …

This post was published on zhihu (in Chinese).

The motivation is, it's getting cold in Seattle. And the condo we live reached an extent that we cannot bear any more. In addition to buying more (and more) heaters, I also began to think about where the energy went, because our …

After I released the IFTTT delay API, there was some interesting discussion going on in the comments. At the same time, I also found the delay API is still too simple. It still couldn't pass any information other than the event name. And this caused troubles in the applications of …