Raspberry Pi. Recipes - Simon Monk

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Table of contents

Introduction (11)

Connection and configuration (15)

• 1.0. Introduction (15)
• 1.1 Selection of the Raspberry Pi model (15)
• 1.2 Closing the Raspberry Pi in its housing (17)
• 1.3 Power supply selection (18)
• 1.4 Choice of operating system distribution (19)
• 1.5 NOOBS - SD card storage (20)
• 1.6 Manual recording of the SD card (Macintosh computers) (22)
• 1.7 Manual recording of the SD card (Windows) (23)
• 1.8 Manual recording of SD card (Linux) (25)
• 1.9 Connecting external devices to Raspberry Pi (26)
• 1.10. Connecting a monitor equipped with DVI or VGA interface (27)
• 1.11. Using a television or monitor connected via a composite video connection (28)
• 1.12. Using the full capacity of the SD card (29)
• 1.13. Changing the size of the image displayed on the monitor (30)
• 1.14. Maximising productivity (32)
• 1.15. Change of password (34)
• 1.16. Starting the Raspberry Pi directly in GUI mode (35)
• 1.17. Switching off Raspberry Pi (36)
• 1.18. Installation of the camera module (37)

2 Networking (41)

• 2.0. Introduction (41)
• 2.1 Connection to the wired network (41)
• 2.2 Establishing your own IP address (43)
• 2.3 Connection to the wired network (44)
• 2.4 Changing the name under which Raspberry Pi is visible in the network (45)
• 2.5 Connecting to a wireless network (46)
• 2.6 Use of console cable (48)
• 2.7 Raspberry Pi remote control using SSH protocol (50)
• 2.8 Raspberry Pi control via VNC (51)
• 2.9 Sharing files on a Macintosh network (52)
• 2.10. Sharing the Raspberry Pi screen on a Macintosh (54)
• 2.11. Using Raspberry Pi as a NAS store (56)
• 2.12. Network printing (59)

3. the operating system (61)

• 3.0. Introduction (61)
• 3.1 Moving files in the graphical interface (61)
• 3.2 Starting Terminal sessions (63)
• 3.3 Viewing files and folders using the Terminal (64)
• 3.4 Copying of files and folders (66)
• 3.5 Renaming the file or folder (67)
• 3.6 File edition (68)
• 3.7. Viewing file content (70)
• 3.8 Creating files without an editor (71)
• 3.9 Creating catalogues (71)
• 3.10. Delete files and folders (72)
• 3.11. Performance of tasks with administrator privileges (73)
• 3.12. What do the file attributes mean? (74)
• 3.13. Modification of file attributes (75)
• 3.14. Change of file owner (76)
• 3.15. Taking screenshots (77)
• 3.16. Software installation using apt-get command (78)
• 3.17. Removing installed software by means of apt-get command (79)
• 3.18. Downloading files using the command line (79)
• 3.19. Downloading the source code using the git command (80)
• 3.20. Automatic start of a program or script when Raspberry Pi starts (81)
• 3.21. Automatic start of a program or script at regular intervals (83)
• 3.22. Search (84)
• 3.23. Use of command line history (85)
• 3.24. Monitoring of processor activity (86)
• 3.25. Archive service (88)
• 3.26. Display list of connected USB devices (89)
• 3.27. Save the command line messages to file (89)
• 3.28. Handling of archives (90)
• 3.29. Use of streams (90)
• 3.30. Hiding the output displayed in the Terminal window (91)
• 3.31. Background launches of programmes (92)
• 3.32. Creating command aliases (93)
• 3.33. Date and time setting (93)
• 3.34. Determining the free space on the memory card (94)

4. software (95)

• 4.0. Introduction (95)
• 4.1 Creating a multimedia entertainment centre (95)
• 4.2 Installation of office software (98)
• 4.3 Installation of other web browsers (99)
• 4.4 Using the Pi Store (101)
• 4.5 Start-up of webcam server (102)
• 4.6. Activation of the classic game console emulator (104)
• 4.7 Launching Minecraft (105)
• 4.8 Launching Open Arena (106)
• 4.9. Raspberry Pi as radio transmitter (107)
• 4.10. Starting the GIMP graphics editor (109)
• 4.11. Internet radio (110)

Python Basics (113)

• 5.0. Introduction (113)
• 5.1 Choice between Python 2 and 3 (113)
• 5.2 Writing a Python application using IDLE (114)
• 5.3 Use of the Python console (116)
• 5.4 Launching Python programs via Terminal (117)
• 5.5 Variables (117)
• 5.6 Display of data generated by the program (118)
• 5.7 Loading user input (119)
• 5.8 Arithmetic operations (119)
• 5.9 Chain-making (120)
• 5.10. Merging (joining) of chains (121)
• 5.11. Conversion of numbers into chains (122)
• 5.12. Conversion of chains into numbers (122)
• 5.13. Determination of chain length (123)
• 5.14. Determination of chain position in the chain (124)
• 5.15. Extraction of a chain fragment (124)
• 5.16. Replacing a piece of chain with another chain (125)
• 5.17. Replacement of chain characters by upper and lower case letters (126)
• 5.18. Activation of commands under certain conditions (127)
• 5.19. Comparison of values (128)
• 5.20. Logical operators (129)
• 5.21. Repeat instructions a specified number of times (130)
• 5.22. Repeat instructions until a certain condition is met (131)
• 5.23. Breaking the loop (131)
• 5.24. Definition of functions (132)

6. Python - letters and dictionaries (135)

• 6.0. Introduction (135)
• 6.1 Creating lists (135)
• 6.2 Accessing a listed item (136)
• 6.3 Establishing the length of the list (136)
• 6.4 Adding elements to the list (137)
• 6.5 Deleting items from the list (138)
• 6.6 List creation as a result of chain processing (138)
• 6.7 List iteration (139)
• 6.8 Numbering of list items (140)
• 6.9 Sorting the list (141)
• 6.10. Cutting a list fragment (141)
• 6.11. Processing of list items by function (142)
• 6.12. Dictionary creation (143)
• 6.13. Accessing dictionary items (144)
• 6.14. Removing items from the dictionary (145)
• 6.15. Dictionary iteration (146)

7. Python - advanced features (147)

• 7.0. Introduction (147)
• 7.1 Creating a multimedia entertainment centre (147)
• 7.2 Date formatting (148)
• 7.3 Return of more than one value (149)
• 7.4 Defining the class (149)
• 7.5 Defining the method (151)
• 7.6 Inheritance (152)
• 7.7 Save data to file (153)
• 7.8 Reading the file (154)
• 7.9. Serialisation (154)
• 7.10. Exception handling (155)
• 7.11. Use of modules (157)
• 7.12. Random numbers (158)
• 7.13. Sending requests to the Web (159)
• 7.14. Python arguments on the command line (159)
• 7.15. Sending e-mails from the Python application (160)
• 7.16. Simple Python Written Web Server (161)

8 Basic issues concerning the GPIO connector (163)

• 8.0. Introduction (163)
• 8.1. GPIO connector contacts (163)
• 8.2. Safe use of GPIO connector (164)
• 8.3 Installation of the RPi.GPIO library (165)
• 8.4 I2C bus configuration (166)
• 8.5 Use of I2C tools (167)
• 8.6 Preparation for SPI (169)
• 8.7 Release of the serial port (170)
• 8.8 Installation of the PySerial library allowing use of the serial port by Python applications (171)
• 8.9 Testing the serial port with Minicom (172)
• 8.10. Connecting the Raspberry Pi to the prototype plate using connecting cables (173)
• 8.11. Combining the Pi Cobbler module with a prototype plate (174)
• 8.12. Voltage reduction of signals from 5 to 3.3 V by means of two resistors (175)
• 8.13. Using a converter module to reduce the voltage of signals from 5 to 3.3 V (177)
• 8.14. Power supply of Raspberry Pi with battery (178)
• 8.15. Power supply to the Raspberry Pi using a lithium polymer (LiPo) battery (179)
• 8.16. Starting with PiFace board (181)
• 8.17. Starting with Gertboard (184)
• 8.18. Starting with RaspiRobot plate (186)
• 8.19. Use of Humble Pi prototype plate (188)
• 8.20. Use of Pi Plate (190)
• 8.21. Connecting a printed circuit board with spring terminals (194)

9 Control of electronic equipment (197)

• 9.0 Introduction (197)
• 9.1 Connecting the LED (197)
• 9.2 LED brightness adjustment (200)
• 9.3 Beep sound generation (202)
• 9.4 Control of a high-power DC-powered device through a transistor (204)
• 9.5 Switching on high-power devices with a relay (206)
• 9.6 Control of high-voltage AC-powered equipment (208)
• 9.7 Creating a graphical interface for switching on and off the electronics connected to Raspberry Pi (210)
• 9.8 Creating a graphical user interface to control the power of the diodes and motors using pulse duration modulation (211)
• 9.9 RGB LED colour change (213)
• 9.10. Creation of a multimedia entertainment centre (215)
• 9.11. Using an analogue voltmeter as a display (218)
• 9.12. Creation of interruption programmes (220)
• 9.13. Web-based GPIO connector control (223)

10 Engines (227)

• 10.0. Introduction (227)
• 10.1 Servomotor control (227)
• 10.2 Control of multiple servomotors (230)
• 10.3 Speed control of a DC powered motor (233)
• 10.4 Changing the direction of rotation of a DC motor (235)
• 10.5 Use of unipolar stepper motors (240)
• 10.6 Use of bipolar stepper motors (244)
• 10.7 Control of the bipolar stepper motor via the RaspiRobot plate (246)
• 10.8 Construction of a simple driving robot (248)

11. digital inputs (253)

• 11.0 Introduction (253)
• 11.1 Connecting the temporary switch (253)
• 11.2 Using the instantaneous switch (256)
• 11.3 Using a two-position bi-stable switch or slide switch (258)
• 11.4 Using the three-position switch (259)
• 11.5 Reduction of knocks generated when pressing a button (261)
• 11.6 Use of external booster resistor (263)
• 11.7 Use of (square) shaft encoder (265)
• 11.8 Using the key block (268)
• 11.9 Motion detection (271)
• 11.10. Raspberry Pi and GPS module (272)
• 11.11. Keyboard input (275)
• 11.12. Interception of mouse movements (277)
• 11.13. Using the real-time clock module (278)

12 Sensors (283)

• 12.0 Introduction (283)
• 12.1 Use of resistance sensors (283)
• 12.2 Light intensity measurement (287)
• 12.3 Methane detection (288)
• 12.4 Voltage measurement (291)
• 12.5 Using a voltage divider (293)
• 12.6 Connection of resistance sensor to an analog-to-digital converter (295)
• 12.7 Temperature measurement with an analogue-to-digital converter (297)
• 12.8 Acceleration measurement (299)
• 12.9 Temperature measurement with digital sensor (302)
• 12.10. Distance measurement (304)
• 12.11. Display of measured values (307)
• 12.12. Saving data to a log created on a USB stick (308)

13. displays (311)

• 13.0. Introduction (311)
• 13.1 Using the four-digit LED display (311)
• 13.2 Message display by means of an I2C interface display consisting of an LED matrix (314)
• 13.3 Using the Pi-Lite board (316)
• 13.4 Displaying messages on the alphanumeric LCD display (318)

14 Raspberry Pi and Arduino (323)

• 14.0 Introduction (323)
• 14.1 Arduino programming via Raspberry Pi (324)
• 14.2 Communication from Arduino via serial port monitor (326)
• 14.3 Arduino control using the PyFirmata library installed on Raspberry Pi (328)
• 14.4 Control of Arduino digital outputs with Raspberry Pi (330)
• 14.5 Arduino control via the PyFirmata library via serial port (331)
• 14.6 Reading data from Arduino digital inputs using the PyFirmata library (334)
• 14.7. Reading data from Arduino analog inputs using the PyFirmata library (336)
• 14.8 Analogue output support (PWM) using the PyFirmat library (337)
• 14.9 Servomotor control using the PyFirmata library (339)
• 14.10. Communication between Raspberry Pi and Arduino via serial interface without using the PyFirmata library (341)
• 14.11. Creating a program communicating with Arduino via the I2C bus (345)
• 14.12. Connection to Raspberry Pi of smaller Arduino tiles (349)
• 14.13. Connecting aLaMode board to Raspberry Pi (350)
• 14.14. Use of Arduino shields and aLaMode board connected to Raspberry Pi (353)
• 14.15. Using Gertboard as Arduino interface (354)

A. Components and distributors (355)

Scorch (361)