DS18B20 not detected in EPSHOME

[gigib]

Hello

Thank you for your support so far. I was able to see DS18B20 temperature sensor with KCS firmware, but then I loaded ESPhome as I was planning to use 6 sensors in the same wire.
After loading ESPHome I'm not able to see a single sensor anymore ( I have left only one for tests):

Code:

[23:48:45][I][i2c.arduino:069]: Results from i2c bus scan:
[23:48:45][I][i2c.arduino:075]: Found i2c device at address 0x21
[23:48:45][I][i2c.arduino:075]: Found i2c device at address 0x22
[23:48:45][I][i2c.arduino:075]: Found i2c device at address 0x24
[23:48:45][I][i2c.arduino:075]: Found i2c device at address 0x25
[23:48:47][C][dallas.sensor:076]:  Pin: GPIO14
[23:48:47][C][dallas.sensor:077]:  Update Interval: 60.0s
[23:48:47][W][dallas.sensor:080]:  Found no sensors!
[23:48:47][C][dallas.sensor:075]: DallasComponent:
[23:48:47][C][dallas.sensor:076]:  Pin: GPIO32
[23:48:47][C][dallas.sensor:077]:  Update Interval: 60.0s
[23:48:47][W][dallas.sensor:080]:  Found no sensors!
[23:48:47][C][dallas.sensor:075]: DallasComponent:
[23:48:47][C][dallas.sensor:076]:  Pin: GPIO33
[23:48:47][C][dallas.sensor:077]:  Update Interval: 60.0s
[23:48:47][W][dallas.sensor:080]:  Found no sensors!
[23:48:57][E][dallas.sensor:112]: Requesting conversion failed

Is the following configuration correct for KC868-A16 and onewire sensor detection?

Code:

i2c:
  sda: 4
  scl: 5
  scan: true
  id: bus_a
 
dallas:
  - pin: GPIO14
  - pin: GPIO32
  - pin: GPIO33

Thanks
Gigi

[admin]

you said, you want to use "SAME WIRE"? but you have define some different pins? what do you want to do??

[gigib]

Hello

Let me explain, at the moment I only have a single DS18B20 connected to the center GPIO ( I believe GPIO 32)
But it is not detected by ESPhome. I had the same connection while running KCS firmware and I could see the temperature with no issues.

[admin]

dallas:
- pin: GPIO32

just only config yaml as these, then check ESPHome log, whether have found DS18B20.
make sure you are really use the GPIO32.

[gigib]

Hello

 I bought a KC868-A8 and I'm seeing the same issue. I tried different GPIOs ( 14, 33) but sensor is still not detected
The only additional configuration I have is:

da

Code:

dallas:
  - pin: GPIO33

Data wire is now connected next to VCC, which should be the 4th GPIO connector

what else could be the issue here?

[admin]

take a photo how you wire?

[gigib]

take a photo how you wire?

   

I'm seeing the same issue with KC868-A16 too

[admin]

your wire is correct. try to change define GPIOS by these (32,33,14):
DS18B20/DHT11/DHT21/WS2812 LED strip -1: 32
DS18B20/DHT11/DHT21/WS2812 LED strip -2: 33
DS18B20/DHT11/DHT21/WS2812 LED strip -2: 14

[gigib]

It looks like the issue was with that specific sensor I was using for tests.
I bought 5 new DS18B20 sensors and I was able to detect all of them when directly connected to the same GPIO.
Now I tried to connect sensors from a 50-meter cat5e bus, but I can only detect 2 or 3 of them.
I might need to distribute sensors to all 4 GPIO or add a resistor. What's your suggestion?

[admin]

50 meter , it's too long. if you use esphome, i suggest you add a new small modulle for read ds18b20 data. let sensor near by esp32 board is better.
we have tested ds18b20 by 30 meter is ok, BUT use thick wire, not CAT5 cable, CAT5 is too thin.