[iot] esp überallklingel
briefkasten melder
- apfelhirn.de/posti-bot-smarter-briefkasten-mit-espressif-esp32/
- www.smarthome-tricks.de/software-iobroker/rfid-musicbox-mit-echodot-esp8266-und-iobroker/
- blog.thomasheldt.de/esp8266-wifi-briefkastenmelder-mit-solarmodul-der-start/#more-349
- www.operation-eigenheim.de/den-briefkasten-ins-smarthome-integrieren-teil-1/
- fxg.li/technik/intelligenter-briefkasten-mit-esp8266/
- https://www.instructables.com/id/MQTT-and-Wifi-Powered-Mailbox-Flag/
- http://www.whatimade.today/esp-8266-mailbox-notifier-using-deepsleep-and-blynk/
[nodemcu][bluetooth] Nodemcu + bluetooth
[mqtt]
[homekit][diy][iot] Arduino Home Automation
Briefkastenmelder
blog.thomasheldt.de/esp8266-wifi-briefkastenmelder-mit-solarmodul-der-start/#comments
forum-raspberrypi.de/forum/thread/19121-raspipo-st-2-der-briefkasten-verschickt-e-mails/
www.thomaslang.nl/esp8266-dht22-lowpower-mqtt-sensor/
//Sleep for 120 seconds, then wakeup and send data again ESP.deepSleep(120 * 1000000, WAKE_RF_DEFAULT);
https://www.open-homeautomation.com/2016/06/12/battery-powered-esp8266-sensor/