MLX90614 and it's weird readings

neel-m · March 29, 2025, 1:27am

You might find this issue enlightening.

github.com/esphome/issues

mlx90614 Report wrong Object temperature and Ambient=nan°C

opened 09:53PM - 08 Jun 23 UTC

closed 01:29AM - 28 Oct 23 UTC

mishomvp

stale

### The problem Hello, As soon as I saw that esphome supports mlx90614 I dec…ided to test one such sensor that I had available. Everything was working and you are showing real temperature values. But after I updated esphome to 2023.5.5 the sensor now shows negative temperature ([D][mlx90614:112]: Got Temperature=-111.2°C Ambient=nan°C). I also checked in the history back and just when I updated to 2023.5.5 on May 29th the readings of this sensor are different. I don't see any sensor reading errors in the logs. Thanks in advance! ### Which version of ESPHome has the issue? ESPHome version 2023.5.5 ### What type of installation are you using? Home Assistant Add-on ### Which version of Home Assistant has the issue? 2023.6.0 ### What platform are you using? ESP32 ### Board esp32dev ### Component causing the issue _No response_ ### Example YAML snippet ```yaml i2c: sda: 21 scl: 22 frequency: 100kHz sensor: - platform: mlx90614 ambient: name: Ambient object: name: Object update_interval: 120s ``` ### Anything in the logs that might be useful for us? _No response_ ### Additional information _No response_