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yet another way to store configuration
Tuesday, April 28 2026
I figured that, since I already had a lot of code in the ESP8266 Remote Control firmware for FRAM (that is, ferroelectric RAM, which is a non-volatile storage technology with essentially infinite wear characteristics), I should make that an additional means by which the system can save and retrieve configuration information. (There are already three other configuration methods: hardcoded, EEPROM on an I2C slave, and local flash.) The FRAM had been implemented over a year ago for logging data when the ESP8266 cannot reach the internet, but I'd left four kilobytes of its 32 kilobytes unused at the top, something I rediscovered as I pieced together its memory map from its source code. I had ChatGPT modify existing functions designed for saving and retrieving configuration data from slave EEPROM to do the same for FRAM, and it seemed to work well enough when I tested it. The only fly in the ointment is that sometimes switching the configuration storage tech results in endless crashes on startup, something I can't quite figure out.
Another thing I managed to do today was arrive at the foot of the escarpment with what is probably the final extension westward of the Chamomile Wall (as it is now getting close to our boundary with someone else's parcel). I then finished "roofing" that end with flat stones and then piled rounded stones in various places in the center axis of the wall to give it something of a spine.
This evening Gretchen made fettucine with chickpeas, kale, and a tahini sauce that I thought was very good (especially with a little hot sauce), though it clearly disappointed her. Later I took a nice hot bath, producing a substantial tub ring of grime that I immediately scrubbed away. In colder weather, I always let the tub full of water remain so it can impart its heat to the indoor air, but it's warmer now, so I let it drain.
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