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I tried to use an Arduino implementation. Hours of digging through the source code later because half this stuff is undocumented I'm giving up, because the design choices are fundamentally stupid and broken. Why did I even try? Seriously. Sigh.
If you're wondering: ESP8266 variant. Can't make the main thread go to sleep and wake it up on wifi events. You get to poll. Which doesn't work when you want power saving. Which I kind of do because I'm building a temperature sensor and 70mA constantly will warm it up.
It's really sad, because I implemented my entire application in 200 lines of code using all these wonderful pre-existing libraries, and now I have to rewrite it (which will probably be 2000 lines) because I hit a fundamental showstopper with power management.
would it be worth separating the sensor from the SoC?
Considered it, but yuck. It's so much neater all in one box.
when in doubt I just ignore all the library stuff and write the relevant registers directly, and _usually_ nothing minds
The chip is undocumented. You need to use ESP's blob libs. Which is still better than Arduino wrappers on top of ESP's blob libs.
had the same problem some time ago. Pooling in loop until wifi link, resets almost always. Only way to use is in AT modem mode with a second uC.
I use one for my MegaDrive WiFi cartridge with FreeRTOS based esp-open-rtos, and yep, power saving for that chip is completely broken. E.g., it keeps the RTC running during sleep, but clears its registers on wake... #WAT
The solution is "don't use Arduino".https://twitter.com/marcan42/status/1031907303497261063 …
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