One-Time Password (OTP)

The otp sensor generates One-Time Passwords according to RFC6238 that is compatible with most OTP generators available, including Google Authenticator. You can use this when building custom security solutions and want to use “rolling codes”, that change every 30 seconds.

Configuration

To enable the OTP sensor, add the following lines to your configuration.yaml:

# Example configuration.yaml entry
sensor:
  - platform: otp
    token: SHARED_SECRET_TOKEN

Generating a token

A simple way to generate a token for a new sensor is to run this snippet of Python code in your Open Peer Power virtual environment:

$ pip3 install pyotp
$ python3 -c 'import pyotp; print("Token:", pyotp.random_base32())'
Token: IHEDPEBEVA2WVHB7

To run in a Docker container:

$ docker exec -it open-peer-power python -c 'import pyotp; print("Token:", pyotp.random_base32())'
Token: IHEDPEBEVA2WVHB7

Copy and paste the token into your Open Peer Power configuration and add it to your OTP generator. Verify that they generate the same code.