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THE SOTH JOURNAL

ESP32/ESP8266 devices

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

WORTH A CLOSER LOOK

ESP32/ESP8266 devices

ESPHome 2026.11 can describe its own firmware in an SBOM for the Cyber Resilience Act

Companies selling products built on ESPHome will soon be able to produce a software bill of materials (SBOM) for its firmware without editing it by hand. Two pull requests merged on 24 October 2026 make ESPHome write the metadata that Espressif's esp-idf-sbom tool reads. The author names the reasons directly: EN 18031 and the EU Cyber Resilience Ac
Oct 24, 2026
3
min read

How to control a garage door from Home Assistant with an ESP32, a relay and ESPHome

Most garage door and gate openers already have a wall button. Press it once and the door moves; press it again and it stops or reverses. An ESP32 with a relay can press that button for you, and two reed switches can tell Home Assistant whether the door is really open or closed. The parts cost little and the whole thing runs locally, with no cloud a
Oct 24, 2026
10
min read

ESPHome 2026.11 adds local Bluetooth control for the Delta AC MAX wallbox

Owners of a Delta AC MAX EV charger can now read it and start or stop charging from an ESP32, without the vendor app and without the cloud. The new delta_wallbox component was merged into ESPHome on 23 October 2026 and is set to ship with ESPHome 2026.11. It talks to the charger over Bluetooth Low Energy and exposes the data as ordinary ESPHome sen
Oct 23, 2026
2
min read

ESPHome 2026.11 connects an ESP32 to the internet through a cellular modem

An ESPHome device no longer needs Wi-Fi or Ethernet to reach the network. A new modem component, merged on 23 October 2026 for ESPHome 2026.11, brings up an IP connection over PPP through a cellular modem wired to the ESP32's UART. The API, MQTT and OTA updates then work the same way they do over Wi-Fi. The pull request was opened in May 2024 and c
Oct 23, 2026
3
min read

DS18B20 with ESPHome: several temperature probes on one wire, without mixing them up

The DS18B20 is the sensor people reach for when they want to know the temperature of something rather than the air in a room: the flow and return pipes of a heating system, a hot water tank, a freezer, an aquarium, the space under the floor. It comes in waterproof probes on a cable, it talks over a single data line, and you can hang several of them
Oct 23, 2026
9
min read