Internet connection dropped at least twice today.
Peter re-scheduled our weekly chat to tomorrow evening, without an internet connection that would probably be for the best.
Saw a repo claiming most DS18B20 sensors are clones, and provided Arduino code to discover and classify each DS18B20. The two waterproof DS18B20 I purchased are D1 type clones. Apparently they are noisy, and have supercapacitors instead of EEPROM for alarms. Though the author also claims that these clones have a 3 C offset at 0 C, but my calibrations dispute that. Perhaps his statements were about the type on average, unless I have a 2 C systematic error in my measurements.