MrPappi
November 10, 2021, 6:14pm
1
Hi,
So after some struggle I give up (for a moment) =).
I have built a temp controller accordingly is my believe but as it isn´t working I guess not.
the strange thing is that I have 4 db18s20 wired sensor and if I connect them “one by one” they show up. very strange.
below is my config (removed sensor details as they dont even come up as 4 found sensors).
esphome:
name: nibe
platform: ESP8266
board: nodemcuv2
# probes DS18B20
dallas:
- pin: D2
update_interval: 30s
Below is the schematic i have used with an 4.7k resistor.
logs:
does anybody have any bright idea?
MrPappi
November 10, 2021, 7:33pm
2
some additional is that it´s wired sensors (2m each)
Akriss
November 10, 2021, 8:29pm
3
I’ve always have powered my DS18B20 sensors off of the 5v with long runs.
Try powering the nodemcu via 5v/USB and move the power to the sensors to 5v pin.
Reference:
[15:33:26][C][dallas.sensor:073]: Pin: GPIO12
[15:33:26][C][dallas.sensor:074]: Update Interval: 10.0s
[15:33:26][D][dallas.sensor:079]: Found sensors:
[15:33:26][D][dallas.sensor:082]: 0x5E02131A7D65AA28
[15:33:26][D][dallas.sensor:082]: 0x4902131A6393AA28
[15:33:26][D][dallas.sensor:082]: 0xB30069E200001928
[15:33:26][D][dallas.sensor:082]: 0xDD01142FDF00C728
[15:33:26][D][dallas.sensor:082]: 0xE00316554741FF28
[15:33:26][D][dallas.sensor:082]: 0x7B04165130D5FF28
MrPappi
November 10, 2021, 8:46pm
4
thanks for the reply, i will check that even though I understand it should be ok with 3.3v. the good news is at least i found the problem why only one sensors was showing up. Did measure everything and the breadboard was broken (whats the odds on that? ) so now at least (after some re-cabling) i see all 4 sensors =) i will continue and hope it will go smoth now but many thanks for the input Akriss.
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