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THE SOTH JOURNAL

Sensors

Ideas, know-how, and a little inspiration for your connected home.

WORTH A CLOSER LOOK

Sensors

ESPHome 2026.11 gets a filter that corrects humidity from sensors in warm enclosures

ESPHome has a new sensor filter, rh_correction, that recalculates relative humidity after you correct the temperature of the same sensor. It was written by damib and merged on 22 October 2026 after review by J. Nick Koston (bdraco) and Jesse Hills. The code went into the dev branch, one day after ESPHome 2026.10.0 came out, and the documentation si
Oct 22, 2026
3
min read

How to build a CO2 monitor with an SCD41 and ESPHome that stays accurate

Getting a CO2 reading out of a Sensirion SCD41 takes about ten lines of ESPHome YAML. Keeping that reading honest over months is the harder part. The sensor corrects its own drift with an algorithm that makes assumptions about your room, and if the room doesn't meet them, the numbers slowly move away from reality without any error in the logs. Wiri
Oct 22, 2026
10
min read

LoraReach: an open LoRaWAN gateway board for the Raspberry Pi CM4, with mains power, 4G and GPS

Brightix, a São Paulo company that designs and makes LED modules, drivers and controls, is preparing a Crowd Supply campaign for LoraReach: a carrier board for building your own LoRaWAN gateway around a Raspberry Pi Compute Module 4 or a pin-compatible module. Hackster.io wrote about it on 19 October 2026. The Crowd Supply page says the project is
Oct 19, 2026
3
min read

ESPHome 2026.11 fixes four Hi-Link radar bugs, from an LD2420 that stops reporting to LD2410S settings delayed by weeks

Four small fixes for Hi-Link mmWave radar modules landed in ESPHome's development branch on 19 October 2026. All four pull requests come from the same contributor, fallenmi, and bdraco merged them between 20:22 and 23:29 Polish time. Each covers a different module: the LD2410, the low-power LD2410S, the LD2420 and the multi-target LD2460. None of t
Oct 19, 2026
4
min read

Home Assistant 2026.11 reads HAVEN air quality monitors locally, from room CO2 to airflow in the duct

Home Assistant is getting a native integration for HAVEN IAQ, a maker of indoor air quality monitors from Burnaby, British Columbia, that sells to homeowners as well as to HVAC professionals. Joost Lekkerkerker merged it into the development branch at 22:31 UTC on 18 October (00:31 Polish time on the 19th), almost three months after GitHub user krh
Oct 18, 2026
3
min read