DS18B20 without resistor with an ESP32 / 8266? Also alternatives for waterproof sensor?

Hi All,

I’m working on a pool project and am attempting to be as compact as possible in the outdoor enclosure, I was reading that with the Raspberry Pi’s its no longer necessary to use the pull up resister, is this also possible with an ESP based device like an ESP32/8266?

Also i was curious if there are any competitors to the DS18B20 that would be waterproof and work well.