Wemos D1 R32 Dallas parasitic mode

Just got my hands on my first ESP32 and are looking to reuse existing Dallas temp sensors.

My problem is that I cant get them detected, answer is [11:58:01][W][dallas.sensor:080]: Found no sensors!

I have 7 sensors connected in parallel and they only have two wires, I connect them to GND and digital pin IO13.

What can be the issue here?

Thanks

Wiring?


DS18B20 problem with 'parasite power mode' - Sensors - Arduino Forum

Possibly, the sensors are premade and only have two wires, brown and white, you mean to connect data port and +5V with a resistor could do it? Any guess on brown or white?

Weird, they should have 3 (VCC,GND and DATA). Got some link to the product and/or pictures? :page_facing_up:

Probably counterfeits?

That’s the parasite power mode I’m aware of

All my dallas 1-wire sensor feature Red (VCC), Black (GND) and Yellow (Data) wires :man_shrugging: