Description
The problem
Hi,
I'm experiencing an issue with the HDC1080 sensor in ESPHome. Occasionally, the temperature reading suddenly drops to -40°C, even though the surrounding readings are perfectly valid and within expected values.
At first, I thought it was a hardware failure, so I replaced the sensor with a brand new unit — but the problem persists with the new sensor as well.
This leads me to believe it might be a software or communication issue rather than a sensor defect. I'm using the default ESPHome configuration for the HDC1080, without any custom settings.
This behavior seems to have started with ESPHome version 2025.5.0, and it still occurs in version 2025.5.2, so it doesn't appear to have been resolved in the latest update.
EDIT: I just realized there are some wrong values for humidity too
Which version of ESPHome has the issue?
2025.5.0
What type of installation are you using?
Home Assistant Add-on
Which version of Home Assistant has the issue?
No response
What platform are you using?
ESP8266
Board
sonoff 4ch pro
Component causing the issue
hdc1080
YAML Config
i2c:
sda: GPIO2
scl: GPIO1
scan: True
id: i2c_bus
sensor:
- platform: hdc1080
temperature:
name: "Temperatura Esterna"
humidity:
name: "Umidità Esterna"
internal: True
update_interval: 30sAnything in the logs that might be useful for us?
[15:46:05][D][sensor:093]: 'Temperatura Esterna': Sending state -40.00000 °C with 1 decimals of accuracy
[15:46:05][D][sensor:093]: 'Umidità Esterna': Sending state 0.00000 % with 0 decimals of accuracy
[15:46:05][D][hdc1080:069]: Got temperature=-40.0°C humidity=0.0%
[15:46:35][D][sensor:093]: 'Temperatura Esterna': Sending state -40.00000 °C with 1 decimals of accuracy
[15:46:35][D][sensor:093]: 'Umidità Esterna': Sending state 41.75415 % with 0 decimals of accuracy
[15:46:35][D][hdc1080:069]: Got temperature=-40.0°C humidity=41.8%Additional information
No response