Having trouble when connecting apt via https?
Try the following steps:
- Importing repository gpg key fails (with certificate or gpg error)
wget --no-check-certificate -qO - https://debian.fhem.de/archive.key | apt-key add -
- apt-get update fails with "no driver for https"
apt-get install apt-transport-https
- apt-get update still fails becaus of https
echo 'Acquire::https::debian.fhem.de::Verify-Peer "false";' > /etc/apt/apt.conf.d/30nohttps