finternet

An indestructible box of internet.

Materials

1. balenaFin 1.1 (running balenaOS >= 2.44.0+rev1)

OPTIONAL (for mobile power):

1. USB cable
2. Jumper cables
3. USB power bank

OPTIONAL (for GSM inputs):

1. Quectel EG25-G
2. Antenna (https://www.amazon.co.uk/Alda-PQ-Antenna-printed-circuit/dp/B06XWTPY7C/ref=sr_1_2?keywords=lte+ufl+antenna&qid=1575455827&refinements=p_76%3A419158031&rnid=419157031&rps=1&sr=8-2)

Mobile power setup

Configuration

The following inputs can be used:

1. Ethernet
2. Wifi (requires configuration)
3. GSM (requires configuration)

The following outputs can be used to share internet:

1. Wifi (configurable SSID/password)
2. (TODO) Ethernet (requires second ethernet port to use ethernet input)
3. (TODO) Bluetooth
4. (TODO) USB

TODO:

1. Ethernet output
2. Bluetooth output
3. USB output
4. Serving NTP on the LAN

NOTES:

hotspot always on (on the slower interface of all available wireless interfaces)

connect to network and captive portal (only if no wifi connection at all?)

finternet.local (perhaps reusing balena-mdns-publisher)

simple express server for config (with link states)

1. output config

   wifi:

    SSID
   
    PSK
   

2. input config

   wifi:

    SSID
   
    PSK
   

   gsm:

    APN
   

   ethernet:

    static IP
   

add data, press reconfigure, handles connection

multiple inputs handled with routing metrics for fallback

Data flow

configurator (web UI) -> actor

• new configuration to store and apply

actor -> configurator

• currently applied config
• stored config
• available interfaces
• available networks