ColdBootAssistant

Behavior

1. If Flask Service is installed, Start Flask Service.
2. Wait 60 seconds and start Cold Boot / Force Shutdown Assistant.
3. If Flask Service is installed, everyone can see current count.

1. Install Raspbian

1. Download Raspbian Lite from Here.

2. Unzip downloaded file.
3. Write image to Micro SD Card.

2. Connect to WiFi (Optional)

sudo raspi-config

1. Choose 2 Network Options
2. Choose N2 Wi-fi
3. Select Country
4. Enter WiFi SSID
5. Enter WiFi Password

3. Enable SSH Server (Optional)

1. Enable SSH Server from raspi-config
2. Choose 5 Interfacing Options
3. Choose P2 SSH
4. Select <Yes>
5. Edit sshd_config

sudo raspi-config

6. Uncomment these lines

#Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::
#LoginGraceTime 2m
#PermitRootLogin prohibit-password
#PasswordAuthentication yes
#PermitEmptyPasswords no

7. Ctrl + O
8. Enter
9. Ctrl + X
10. Make sure SSH Service is enabled and reload SSH Service

sudo service ssh enable
sudo service ssh restart
sudo service ssh status

4. Install Services

1. Install git

sudo apt-get update
sudo apt-get install -y git

2. Clone this repository

git clone https://github.com/eavictor/ColdBootAssistant.git

3. Change Directory

cd ColdBootAssistant

4. Change file owner (4 files)

chown +x install1_python.sh
chown +x install2_coldboot.sh
chown +x install2_force_shutdown.sh
chown +x install3_flask.sh

5. Install Python 3.7.3 (1st script)

sudo bash install1_python.sh

6. Change user to root

sudo -i

7. Install one of below service (2nd script)

bash install2_coldboot.sh
bash install2_force_shutdown.sh

8. Install Flask for showing cycle count (optional, 3rd script)

bash install3_flask.sh

9. For Force Shutdown, install python 3.7.3 and dependencies and put pc_boot_complete.py to startup folder

Hardware parts

1. 1x Raspberry Pi 3 Model B
2. 1x Sharp PC817 (OPTO Isolator)
3. 1x Keyes Relay
4. 1x 1/4W 10kΩ Resistor
5. 1x 1/4W 1kΩ Resistor
6. 1x Breadboard
7. 3x Female-to-Female DuPont Wire (see below)
8. 8x Male-to-Female DuPont Wire (see below)
9. 1x MicroSD Card

Important

Female-to-Female DuPont Wire

1x red (RPi PIN 2 <--> Relay VCC PIN)

1x black (RPi PIN 6 <--> Relay GND PIN)

1x white (RPi PIN 12 <--> Relay IN1 PIN)

Important

Male-to-Female DuPont Wire

1x red (PC817 PIN 4 <--> RPi PIN 1)

2x black (Breadboard - <--> RPi PIN 9)

1x blue (PC817 PIN 3 <--> RPi PIN 3 <--> 1kΩ Resistor <--> Breadboard-)

1x green (PC PowerLED+ <--> PC817 PIN 1)

1x yellow (PC PowerLED- <--> PC817 PIN 2 10kΩ Resistor <--> Breadboard-)

1x orange (Relay PIN 1 <--> PowerSW+)

1x purple (Relay PIN 3 <--> PowerSW-)