Fone (Still WIP)

This project is an implementation of a cell phone while keeping true to the unix philosophy.

This project uses the following components:

• Raspberry Pi 3B
• Adafruit FONA 808 - Mini Cellular GSM + GPS Breakout

Fone consists of a server which will speak to the FONA baord using the serial interface. It accepts two types of transactions from clients:

1. Commands - These are transactions which require the FONA board to query or execute a task.
2. Subscriptions - These are transactions which require the server to notify a subscribing client about any subscribed notifications originating from the FONA board.

Every client in the server will have a specialized function and will need to communicate to the FONA board via the server.

Additional information may be found in the man pages in docs/man/

Setup

1. Setup build environment

   sudo apt install build-essential screen
   

2. Setup serial communication

3. Connect the GPIO pins on the FONA 808 to the pi. Look here for more detail on pinouts

• FONA GND -> Pi Ground
• FONA Vio -> Pi 3v3 power
• FONA RX -> Pi TXD
• FONA TX -> Pi RXD

4. Configure ppp to connect to the network stack

   apt install ppp
   cp etc/ppp/peers/fona /etc/ppp/peers/fona
   chmod 644 /etc/ppp/peers/fona
   cp etc/chatscripts/gprs /etc/chatscripts/gprs
   chmod 644 /etc/chatscripts/gprs
   

5. Deploying (may be daemonized later)

   sudo pon fona
   cd /path/to/fone/code
   make all
   screen -fa -d -m -S foneserver ./build/foneserver
   # Wait until foneserver is running
   ./build/fone_configure
   screen -fa -d -m -S call-receive ./build/call-receive
   screen -fa -d -m -S sms-receive ./build/sms-receive
   

Interesting configuration

AT+CLIP=1      # Enable Caller ID
ATE 0          # Disable Echoing
AT+CHFA=0      # Main audio
AT+CLVL=20     # Volume

# Receiving SMS
AT+CMGL="ALL"  # List all messages in storage
AT+CPMS="SM"   # Prefer SM store
AT+CNMI=2,0    # do not emit +CMTI notifications. This will need to change if moved to subscription model

What is complete:

• Core
  • Tether Cellular Data Connection
  • Threaded named pipes
  • Threaded UART interface
  • Transaction message queue
  • Subscriber message queue
• Application Clients
  • Test Network
  • Sending SMS
  • Receive SMS
  • Initiate Phone Call
  • Answer Phone Call
  • GPS
  • Something else?
• User Interfaces