How about setting the calibration values to 1.0 instead of 0.0 and tick the Enable box

I realized that the problem does not exist on pin 2 (D4). ESPEasy detects all sensors and reads perfectly well all data if the 1-wire sensors are attached to pin2. At other pins the sensors do not get detected or always read zero.

What is so special about GPIO-2 (D4) on the Wemos D1 mini?

BTW, I tried the following firmware versions: 78, 108, 120, and 137 The log shows: 9214976 : WD : Uptime 153 ConnectFailures 0 FreeMem 26960 9214977 : WD : Uptime 153 ConnectFailures 0 FreeMem 26960 9230940 : DS : Temperature: 0.00 (28-57-47-f3-6-0-0-25) 9244978 : WD : Uptime 154 ConnectFailures 0 F...

Hi, ESPEasy works quite well on WemosD1 and Witty Cloud devices using a DHT22 sensor. Thanks a lot for this great sw! Unfortunately I cannot get any DS18b20 temp sensor working. The boards are powered by 2A power-banks. The IDX / Var is definitely NOT zero. I tried different values (1, 2, 22, 77, 12...

You have to set "IDX / Var" to something /= 0, e.g. 1