Raspberry Pi – Tips & Notes

OS Install

NOOBS – New Out Of the Box Software

https://www.raspberrypi.org/downloads/noobs/

https://www.raspberrypi.org/learning/software-guide/

https://www.raspberrypi.org/help/videos/#noobs-setup

https://www.raspberrypi.org/documentation/installation/noobs.md

Download the latest hoop – unzip and copy it to a overwrite formatted SDCard which are then used to boot and load an appropriate OS for the RPi

 

Remote Desktop Control RPi from Mac using XRDP

sudo apt-get install xrdp

 

GPIO – General Purpose input/Output

A General Purpose Input/output (GPIO) is an interface available on most modern microcontrollers (MCU) to provide an ease of access to the devices internal properties. Generally there are multiple GPIO pins on a single MCU for the use of multiple interaction so simultaneous application.

Pinout – https://pinout.xyz

 

I²C – Inter-Inter Circuit

I2C is a serial communication protocol, so data is transferred bit by bit along a single wire (the SDA line). Like SPI, I2C is synchronous, so the output of bits is synchronized to the sampling of bits by a clock signal (the SCL line) shared between the master and the slave.

I²C, pronounced I-squared-C, is a synchronous, multi-master, multi-slave, packet switched, single-ended, serial computer bus invented in 1982 by Philips Semiconductor. It is widely used for attaching lower-speed peripheral ICs to processors and microcontrollers in short-distance, intra-board communication.

http://www.circuitbasics.com/basics-of-the-i2c-communication-protocol/

  • The default device address for I2C is 0x18

 

PWM – Pulse-width modulation

Pulse-width modulation, or pulse-duration modulation, is a way of describing a digital signal that was created through a modulation technique, which involves encoding a message into a pulsing signal.

Pulse Width Modulation, or PWM, is a technique for getting analog results with digital means. Digital control is used to create a square wave, a signal switched between on and off.

PWM is a way to control analog devices with a digital output

Pulse Width Modulation (PWM) is a fancy term for describing a type of digital signal. Pulse width modulation is used in a variety of applications including sophisticated control circuitry. A common way we use them is to control dimming of RGB LEDs or to control the direction of a servo motor.

There are many different ways to control the speed of DC motors but one very simple and easy way is to use Pulse Width Modulation.

 

Ultrasonic Sensor HC SR04

https://randomnerdtutorials.com/complete-guide-for-ultrasonic-sensor-hc-sr04/

Projects:

Three Wheeled Smart Car – Freenove

https://github.com/Freenove/Freenove_Three-wheeled_Smart_Car_Kit_for_Raspberry_Pi

Servo – servo control accuracy is 1us = 0.09degrees

 

 

What is P3M3

Maturity models are tools that can benchmark current performance against best practise. It provides valuable information on the current status of operations and point out areas for improvement that could increase the operational effectiveness, not just from a processes perspective but also the involved people, the tools used and the interaction of different disciplines within an organisation.

P3M3 is a management maturity model looking across an organization at how it delivers its projects, programmes and portfolio. P3M3 is unique in that it considers the whole system and not just at the processes.

P3M3 provides three maturity models that can be used separately to focus on specific areas of the business, or more generally to help the organization assess the relationships between their portfolios, programmes and projects.

The three P3M3 maturity models are:

  • Portfolio Management
  • Programme Management
  • Project Management

Structure

Each sub-model is further broken down into seven perspectives:

  • Organizational governance
  • Management control
  • Benefits management
  • Risk management
  • Stakeholder management
  • Finance management
  • Resource management

The P3M3 model has five maturity levels:

  • Level 1: Awareness
  • Level 2: Repeatable
  • Level 3: Defined
  • Level 4: Managed
  • Level 5: Optimized

P3M3 allows an assessment of the process employed, the competencies of people, the tools deployed and the management information used to manage and deliver improvements. This allows organizations to determine their strengths and weaknesses in delivering change.

There are no interdependencies between the models so an assessment may be against one, two or all of the sub-models. It is possible for an organization to be better at programme management than it is at project management.

Benefits

Through baselining an organization’s performance it is possible to identify areas where an organization can most effectively increase its project, programme and portfolio capability. Therefore the sort of benefits expected from using P3M3 to develop and implement an improvement plan would be:

  • Cost savings
    • On delivering project outputs and programme outcomes
    • Integrate processes across an organization
    • More effective use of budgets
  • Improved benefits delivery
  • Improved quality of delivered projects and programmes
  • Improved customer satisfaction
  • Increase return on investment
  • Providing plans for continual progression
  • Recognizing achievements from previous investment in capability improvement
  • Focusing on the organization’s maturity, not specific initiatives (you can run good programmes and projects without having high levels of maturity – but not consistently).