Raspberry Pi

• Determine the Pi's MAC address with the command ifconfig (The ether value is the MAC address)
• Register the MAC address with Tufts Wireless Device Registration
• Enter the command sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
• Add the network information for Tufts Wireless:

network={

    ssid="Tufts_Wireless"

    key_mgmt=NONE

}

• Reboot the Pi with the command sudo shutdown -r now

For more detailed instructions on setting up your Raspberry Pi through the USB to Serial Converter visit http://lctronics.org/rpi-setup.html

Establishing an SSH connection to the Raspberry Pi

• Determine the Pi's IP address with the command ifconfig wlan0 (The IP address appears after inet)
• Enter the command sudo raspi-config, Select Interfacing Options, and enable the SSH server
  • You should also change the Pi's password at this time
  • To make your Pi extra secure you may also follow directions to use SSH Keys to securely access the Pi without a password
    • If you receive the warning WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! then enter the command ssh-keygen -R <IP> on your local machine
• Disconnect the FTDI from the Pi and your computer and exit the terminal session (^a ^k)
• In the terminal window enter the command ssh pi@<IP> (replace <IP> with the Pi's IP address)

Connecting to ThingWorx

• Run the following commands on the Raspberry Pi
  • sudo apt-get install python-pip
  • pip install requests
  • mkdir Thingworx
• Create a python script to write values to properties on Thingworx
  • nano write.py
• Paste the following code into the nano editor:

import requests

import json

# Info

url = "http://pp-1804271345f2.portal.ptc.io:8080/Thingworx/Things/CEEO_Summer/Properties/"

headers = {

        'appKey': "<your appkey here>",

        'Accept': "application/json",

        'Content-Type': "application/json"

        }

propName =raw_input("Enter Property: ")

value=raw_input("Enter Value: ")

propValue = {propName: value}

# Put

requests.request("PUT",url+'*',headers=headers,json=propValue)

# Get (validate value was posted)

getResponse=requests.request("GET",url+propName,headers=headers)

parsed_json = json.loads(getResponse.text)

if set(parsed_json['rows'][0][propName]) == set(value):

  print('Property Value Updated')

else:

 print('Property Value was not updated')

• Exit the editor with ^x and run the python script to test the connection to Thingworx with the command python write.py
• Create another python script to read properties from Thingworx
  • nano read.py
• Paste the following code into the nano editor:

import requests

import json

# Info

url = "http://pp-1804271345f2.portal.ptc.io:8080/Thingworx/Things/CEEO_Summer/Properties/"

headers = {

        'appKey': "<your appkey here>",

        'Accept': "application/json",

        'Content-Type': "application/json"

        }

propName =raw_input("Enter Property: ")

# Get

getResponse=requests.request("GET",url+propName,headers=headers)

parsed_json = json.loads(getResponse.text)

print(('Property Value: ')+(parsed_json['rows'][0][propName]))

More API calls can be made with python. The syntax for these calls are available at https://documenter.getpostman.com/view/478773/2SKqo9

The rest of the tutorials on this page are still incomplete

Raspberry Pi with MatLAB Online

Resource: https://www.mathworks.com/help/supportpkg/raspberrypiio/ug/connect-to-raspberry-pi-hardware-board-in-matlab-online.html?s_v1=24252&elqem=2377458_EM_NA_DIR_18-06_MOE-EDU

• Note: you can only connect to a Raspberry Pi 3
• Run the following commands to setup the raspberry pi
  • sudo apt-get update
  • sudo apt-get install matlab-rpi
  • sudo matlab-rpi-setup

Using Arduino with Raspberry Pi

For projects that require analog pins, you can connect the Arduino through a serial connection and control it as a slave.

Resources: https://pypi.org/project/nanpy/ , https://www.youtube.com/watch?v=QumIhvYtRKQ

• sudo apt-get install arduino -y
• Install git
  • sudo apt-get update
  • sudo apt-get dist-upgrade
  • sudo apt-get install git
• navigate to or make a downloads directory
• git clone https://github.com/nanpy/nanpy-firmware.git
• cd nanpy-firmware
• Configure Nanpy
  • ./configure.sh
  • cd Nanpy
  • nano cfg.h