Devices and chips that use the Dallas/Maxim 1-Wire protocol, e.g. iButton have been around since the 1990s. The DS18B20 temperature sensor is still very popular (although it's more likely that you get one of its clones).
This page contains 1-Wire primitives for STM8 eForth. Higher level words, e.g. ROM scanning or the DOW-CRC8 will be added when required.
\ STM8 eForth "1-Wire" communication primitives
\res MCU: STM8S103
\res export PB_DDR PB_IDR
#require ]B!