Raspberry Pi

From cod3v

Some of my Raspberries

  • Raspeberry 1 (or perhaps 1B) with a camera module on a wood stick. 26 pins. UART.

Simple things used in every Project



Server side

Finding the IP address

The SSH is disable by default after 2016. Below is show how to enable without using keyboard.

Use nmap -F to fast scan all devices in the local network. The default passwords are listed at Raspberry pi default login-password.

Try ping raspberrypi.local.

Enable ssh

On another computer, mount the Raspian boot SD card, navigate to the boot folder cd /Volumes/boot, create a blank file called ssh touch ssh. That's all.

Using the Raspian GUI: Preferences -> Raspberry Pi Configuration -> Interfaces -> SSH.

Using the terminal: sudo raspi-config or use systemctl:

sudo systemctl enable ssh
sudo systemctl start ssh


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  • MH-Z19 IR infrared Carbon Dioxide Gas Sensor For Air CO2 Concentration Monitor
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  • CD30 Air Quality Sensors Module for CO2 and RH/T Measurements I2C PWM Modbus

Erase the SD card

Use camera to format the SD card, or see https://www.raspberrypi.org/forums/viewtopic.php?t=204167 .

Bluetooth on Raspi 3

sudo apt update
sudo apt upgrade
sudo apt-get install python-bluez
#sudo apt install bluetooth pi-bluetooth bluez blueman

sudo nano /etc/systemd/system/dbus-org.bluez.service. Modify ExecStart=/usr/lib/bluetooth/bluetoothd –C

sudo sdptool add SP

sudo reboot

sudo apt-get install bluetooth bluez libbluetooth-dev
sudo python3 -m pip install pybluez