This repository hosts a transmitter that implements the "Philips-temperature" protocol used by our digi clock + thermometer combo:
It is a rebranded "Electronics Tomorrow LTD." model no. 7904. (according to the label on the back)
According to rtl_433 this clock's outdoor temperature sensor uses the philips_aj3650 protocol to transmit the temperature data.
The transmitter code here is targeted at an ESP32 chip augmented with a cheap 434 MHz transmitter.
More information can be found in the Putting an old digital clock (with an outdoor thermometer) on steroids article.
All you need to do is plug Data in pin of the 433 MHz transmitter to
the GPIO_NUM_5 on the ESP32:
(the green wire is a very crude antenna)
This repository uses platformio, so all you need to do is:
pip3 install platformio
export INFRA_WIFI_SSID=my-wifi
export INFRA_WIFI_PASS=password
pio runto get a firmware image.
- Author: Michal Jirku (wejn.org)
- License: GPL v2, unless stated otherwise in the file