1wire issues

ESPHome
1

So I have 4 Kinkony KC868-A8 boards,

a few with 1wire running, but recently 1 unit has recently stopped recognizing any 1wire devices, such as the ds18b20 sensors connected.

I’ve tried new sensors, tried a different port on the kinkony, also tried manually adding a 4k7 resistor which im sure is not required as this is built in, but no matter what, I cannot get it to recognize any sensors.

The code is the same as the other Kinkony devices but at this stage its looking more and more like a hardware issue but I just wanted to be sure that i’m not missing anything.

I have tried removing the code, and re adding it, also no go.

Any ideas?

Thanks

2

Are you running ESPHome 2024.6 or later, with the one_wire component, or earlier with the dallas component?

Definitely DS18B20 not DS18S20?

Might help to share it anyway.

3

Yes, difinitely the DS18B20 sensors,

Log output stating the version

INFO ESPHome 2024.6.3
INFO Reading configuration /config/esphome/house-outputs.yaml...
[22:32:11][I][app:100]: ESPHome version 2024.6.3 compiled on Jun 28 2024, 22:05:00
[22:32:11][C][logger:185]: Logger:
[22:32:11][C][logger:186]:   Level: DEBUG
[22:32:11][C][logger:188]:   Log Baud Rate: 115200
[22:32:11][C][logger:189]:   Hardware UART: UART0
[22:32:11][C][i2c.arduino:071]: I2C Bus:
[22:32:11][C][i2c.arduino:072]:   SDA Pin: GPIO4
[22:32:11][C][i2c.arduino:073]:   SCL Pin: GPIO5
[22:32:11][C][i2c.arduino:074]:   Frequency: 50000 Hz
[22:32:11][C][i2c.arduino:086]:   Recovery: bus successfully recovered
[22:32:11][I][i2c.arduino:096]: Results from i2c bus scan:
[22:32:11][I][i2c.arduino:102]: Found i2c device at address 0x22
[22:32:11][I][i2c.arduino:102]: Found i2c device at address 0x24
[22:32:11][C][gpio.one_wire:020]: GPIO 1-wire bus:
[22:32:11][C][gpio.one_wire:021]:   Pin: GPIO14
[22:32:11][W][gpio.one_wire:078]:   Found no devices!

Code below.

one_wire:
  - platform: gpio
    pin: GPIO14

sensor:
  - platform: dallas_temp
    address: 0x950121128170a628
    name: "Temp"

Thanks

4

Ok, this is interesting.

If i remove the sensor part and just add the one_wire component, it finds the sensor.

one_wire:
  - platform: gpio
    pin: GPIO14

[22:44:05][C][gpio.one_wire:020]: GPIO 1-wire bus:
[22:44:05][C][gpio.one_wire:021]:   Pin: GPIO14
[22:44:05][C][gpio.one_wire:080]:   Found devices:
[22:44:05][C][gpio.one_wire:082]:     0x950121128170a628 (DS18B20)
1 Like
5

Bump? this is still an issue and I have no idea why this is happening?

6

Additionally, from the log.

[01:01:38][W][dallas.temp.sensor:139]: 'CoreRackTemp' - Scratch pad checksum invalid!
[01:01:38][W][component:157]: Component dallas_temp.sensor set Warning flag: scratch pad checksum invalid
[01:01:38][D][sensor:094]: 'CoreRackTemp': Sending state nan °C with 1 decimals of accuracy
7

Solved this by adding

setup_priority: -100

To my sensor.

1 Like