1‐wire temperature sensors - nliaudat/esp32_8ch_motor_shield GitHub Wiki

Usage of 1-wire temperature sensors (DS18B20): https://esphome.io/components/sensor/dallas.html

"... The 1-Wire bus ... should have an external pullup resistor of about 4.7KΩ. ..." "... For this, connect a resistor of about 4.7KΩ between 3.3V and the data pin. ..." "... Values ± 1KΩ will, in most cases, work fine as well, if you don’t have massively long wires. ..."

1-Wire Bus	Board	DS18B20	Resistor
Power	VCC (3.3. V)	red	~4.7KΩ between Power and Data
Ground	GND	black	-
Data	IO (e.g. IO22)	yellow	~4.7KΩ between Power and Data

See: https://github.com/nliaudat/esp32_8ch_motor_shield/blob/main/extension.md and https://github.com/nliaudat/floor-heating-controller/blob/main/sensor_temperature.yaml for sample code

Note: With proper and short cabling more than 16 DS18B20 on the same 1-wire bus seems to be possible.