====== ESP32 ======
  * [[https://www.youtube.com/watch?v=CJhWlfkf-5M|ESP32 Geheimen: Onderbrekingen, en "Deep-sleep"]]
  * [[https://youtu.be/1pwqS_NUG7Q|ESP OTA ("Over The Air" handleiding met trucs (incl. OTA debugging)]]