Reads optional configuration for Pulse. Except for in during testing this library use the configuration app :vintage_heart with key, VintageHeart.Pulse.

The following defaults will be used if not otherwise configured:any()

• heart_callback? - true. Controls whether the application is registed as the :heart callback
• poll_interval_millis - 10_000 - polls every 10 seconds
• offline_kick_count - 24 - After 24, or whatever this is configured to, polls without an internet connection then VintageNet is kicked causing an attempted reconnection to the wlan0.
• offline_status_down_count - 84 - After 84 internet-disconnected polls the status is set to be :down. Unless heart_callback? was false then :heart will detect the status and reboot the device.
• wizard_hotspot_ip - {192, 168, 0, 1}. When this is the IP address assume that WiFi is being setup via VintageNetWizard, so connectivity checks are suspended.

Note that the wizard hotspot id is not validated.