Home

Raspberry Pi Connections

Audio

• Connect white extender cable to Pi's audio jack
• Connect black male audio jack to extender (red and green wires with black jacket)

Power

• USB micro power adapter (Canakit) with inline two-state button switch

Safe Shutdown Button

• Blue and purple wire with small black button switch
  • GPIO18 (6th from top on right) - Blue
  • GND (7th from top on right) - Purple

Ringing Control Connections (Output)

• GND (3rd from top on right) - Blue
• GPIO14 (4th from top on right) - Green

Hook Detection Connections (Input)

• GPIO4 (4th from top on left) - Yellow
• GND (5th from top on left) - Orange

Circuit Board Connections

Ringing generator power (Kyocera power adapter)

• female micro USB connector with red and black wires and blue jacket
• connects to center of board
  • Pin H07 - Red wire
  • Pin I07 - Black wire

Raspberry Pi 4-wire band

• Blue-Green-Yellow-Orange colors (in that order)
• Male pins
  • Pin F01 - Green
  • Pin F02 - Blue
  • Pin E14 - Yellow
  • Pin F14 - Orange

Hook switch connections (two blue twisted wires, symmetric)

• Pin A06 - Blue
• Pin A08 - Blue

Ringing generator power input

• M14 - Red
• O14 - Black

Configuration

WiFi Direct Connection (basic)

1. Log onto Phone WiFi network with password PASSWORD
2. Open up file browser ("Finder" on mac)
3. Enter URL in address bar: smb://Phone/phone
4. Enter the following login info:
   1. Username: pi
   2. Password: PASSWORD
   3. Workgroup: WORKGROUP
5. Open "config.py" with a text editor to change configuration

SSH (advanced)

• Connect to Phone WiFi network or power up Raspberry Pi with ethernet cable connected
• Run the following in console or other terminal emulator: ssh pi@phone.local
• Enter password PASSWORD
• Navigate to /home/pi/share and edit config.py

Update Audio Files

• Follow steps for configuration #1-#4.
• Navigate to audio folder (/home/pi/share/audio)
• Delete/add new audio files

Notes

Follow Raspberry Pi as a Standalone WiFi Access Point with some modifications:

• Step 3: Use ifconfig to bring up/down interface wlan0:

  • sudo ifconfig wlan0 down
  • sudo ifconfig wlan0 up

• Add allow-hotplug befoore wlan0 config in /etc/network/interfaces (not sure if needed?)

• Step 5: Shut down dnsmasq when trying to reach internet with ethernet

• Run the following before starting/enabling hostapd service:

  • sudo systemctl unmask hostapd
  • sudo systemctl enable hostapd
  • sudo systemctl start hostapd
  • See: Failed to start hostapd.service: Unit hostapd.service is masked./documentation/issues/1018#issuecomment-471335938)

• resolvconf settings will override dnsmasq nameserver, uncomment no-resolv in /etc/dnsmasq.conf

• Patience. It can take over a minute for WiFi connection to work after rebooting.

Samba:

• Follow Set up a Raspberry Pi as a File Server for your local network
• Connect to shared folder by typing into file browser:
  • smb://DEVICE/FOLDER

Dial tone:

• 350 Hz + 440 Hz pure sine wave
• Generate on the fly or play from audio file (latter seems simpler)

Since this project is an installation, RPi needs to be safely shutdown with a physical button:

• gpiozero shutdown button

Black Magic Telephone Ringing Generator

• Pulls about 180 mA (5V input) when ringing