Raspberry Pi 3 Cookbook for Python Programmers - Third Edition

Cover......Page 1
Title Page......Page 2
Copyright and Credits......Page 3
Dedication......Page 5
Packt Upsell......Page 6
Contributors......Page 7
Table of Contents......Page 10
Preface......Page 21
Introduction......Page 27
Introducing Raspberry Pi......Page 28
Why Python?......Page 29
Which version of Python should you use?......Page 30
The Raspberry Pi family – a brief history of Pi......Page 31
Which Pi to choose?......Page 32
Getting ready......Page 33
How to do it.........Page 34
Secondary hardware connections......Page 38
Getting ready......Page 39
How to do it.........Page 41
How it works.........Page 42
Changing the default user password......Page 44
Preparing an SD card manually......Page 45
Expanding the system to fit in your SD card......Page 48
Accessing the RECOVERY/BOOT partition......Page 49
Using the tools to back up your SD card in case of failure......Page 52
How to do it.........Page 53
There's more.........Page 54
Using built-in Wi-Fi and Bluetooth on Raspberry Pi......Page 55
Connecting to your Wi-Fi network......Page 56
Connecting to Bluetooth devices......Page 58
Getting ready......Page 59
How to do it.........Page 61
Networking directly to a laptop or computer......Page 62
Getting ready......Page 63
How to do it.........Page 68
There's more.........Page 72
See also......Page 73
Getting ready......Page 74
How to do it.........Page 75
There's more.........Page 79
Getting ready......Page 80
How to do it.........Page 81
How it works.........Page 82
Connecting remotely to Raspberry Pi over the network using VNC......Page 83
How to do it.........Page 84
There's more.........Page 85
Getting ready......Page 86
How to do it.........Page 87
How it works.........Page 89
Running as a desktop with X11 forwarding......Page 90
How to do it.........Page 91
Getting ready......Page 93
How to do it.........Page 94
There's more.........Page 95
Introduction......Page 97
How to do it.........Page 98
How it works.........Page 99
How to do it.........Page 100
Stemming text data......Page 101
How to do it.........Page 102
How to do it.........Page 103
How to do it.........Page 105
Applications of text classifiers......Page 108
Introduction......Page 109
Getting ready......Page 110
How to do it.........Page 112
How it works.........Page 113
How to do it.........Page 116
How it works.........Page 118
There's more.........Page 119
Getting ready......Page 121
How to do it.........Page 122
How it works.........Page 124
There's more.........Page 127
Organizing your photos automatically......Page 130
How to do it.........Page 131
How it works.........Page 133
How to do it.........Page 136
Logistic regression classifier......Page 138
How to do it.........Page 139
How to do it.........Page 140
How to do it.........Page 142
Analyzing the sentiment of a sentence......Page 143
How to do it.........Page 144
How to do it.........Page 146
Applications of sentiment analysis......Page 148
Introduction......Page 149
How to do it.........Page 150
How it works.........Page 151
Drawing lines using a mouse on Tkinter Canvas......Page 154
How to do it.........Page 155
Creating a bat and ball game......Page 156
How to do it.........Page 157
How it works.........Page 160
Creating an overhead scrolling game......Page 164
Getting ready......Page 165
How to do it.........Page 166
How it works.........Page 171
Introduction......Page 175
How to do it.........Page 176
How to do it.........Page 177
Image scaling......Page 182
How to do it.........Page 183
How to do it.........Page 187
How to do it.........Page 192
Blurring and sharpening images......Page 195
How to do it.........Page 196
Detecting edges in images......Page 200
How to do it.........Page 201
See also......Page 204
How to do it…......Page 205
Detecting corners in images......Page 208
How to do it.........Page 209
Introduction......Page 212
Getting ready......Page 214
How to do it.........Page 216
How it works.........Page 219
Shaders......Page 221
Lights......Page 222
Creating and importing 3D models......Page 223
How to do it.........Page 224
There's more.........Page 226
Creating or loading your own objects......Page 227
Changing the object's textures and .mtl files......Page 228
Creating a 3D world to explore......Page 229
How to do it.........Page 230
How it works.........Page 232
Building 3D maps and mazes......Page 234
Getting ready......Page 235
How to do it.........Page 236
How it works.........Page 240
The Building module......Page 242
Using SolidObjects to detect collisions......Page 246
Building a face detector application......Page 247
How to do it.........Page 248
How to do it.........Page 250
How it works.........Page 253
Applications of a face recognition system......Page 254
Introduction......Page 255
Getting ready......Page 260
How to do it.........Page 262
How it works.........Page 263
There's more.........Page 264
Controlling the GPIO current......Page 265
Getting ready......Page 267
Trying a speaker or headphone with Raspberry Pi......Page 268
How to do it.........Page 269
How it works.........Page 270
Pull-up and pull-down resistor circuits......Page 271
Getting ready......Page 273
How to do it.........Page 274
How it works.........Page 276
Resetting and rebooting Raspberry Pi......Page 277
Adding extra functions......Page 279
Getting ready......Page 281
How to do it.........Page 284
There's more.........Page 286
Emulating mouse events......Page 287
Getting ready......Page 288
How to do it.........Page 290
How it works.........Page 292
There's more.........Page 293
Displaying random patterns......Page 294
Mixing multiple colors......Page 295
Getting ready......Page 298
How to do it.........Page 300
How it works.........Page 305
Introduction......Page 307
Getting ready......Page 308
How to do it.........Page 311
How it works.........Page 313
Using multiple I2C devices......Page 314
I2C bus and level shifting......Page 315
Using just the PCF8591 chip or adding alternative sensors......Page 316
Reading analog data using an analog-to-digital converter......Page 318
Getting ready......Page 319
How to do it.........Page 320
How it works.........Page 321
Gathering analog data without hardware......Page 322
Getting ready......Page 325
How to do it.........Page 327
How it works.........Page 329
Plotting live data......Page 331
Scaling and calibrating data......Page 333
Extending the Raspberry Pi GPIO with an I/O expander......Page 335
How to do it.........Page 336
How it works.........Page 338
There's more.........Page 339
I/O expander voltages and limits......Page 340
Using your own I/O expander module......Page 341
Directly controlling an LCD alphanumeric display......Page 342
Capturing data in an SQLite database......Page 343
How to do it.........Page 344
How it works.........Page 347
There's more.........Page 349
The WHERE command......Page 350
Viewing data from your own webserver......Page 351
Getting ready......Page 352
How to do it.........Page 355
How it works.........Page 357
Security......Page 359
Using MySQL instead......Page 360
Sensing and sending data to online services......Page 361
Getting ready......Page 362
How to do it.........Page 365
How it works.........Page 366
See also......Page 367
Visualizing optical characters......Page 368
How to do it.........Page 369
How to do it.........Page 370
How it works.........Page 373
Applications of an OCR system......Page 374
Introduction......Page 375
Getting ready......Page 376
How to do it.........Page 380
How it works.........Page 385
Darlington array circuits......Page 387
Transistor and relay circuits......Page 389
Tethered or untethered robots......Page 390
Rover kits......Page 391
Using advanced motor control......Page 393
How to do it.........Page 395
How it works.........Page 397
There's more.........Page 398
Motor speed control using PWM control......Page 399
Using I/O expanders......Page 400
Building a six-legged Pi-Bug robot......Page 401
How to do it.........Page 402
How it works.........Page 406
Controlling the servos......Page 407
The servo class......Page 408
Learning to walk......Page 409
Controlling servos directly with ServoBlaster......Page 412
Getting ready......Page 413
How to do it.........Page 416
How it works.........Page 418
Getting ready......Page 420
How to do it.........Page 422
There's more.........Page 426
Getting ready......Page 428
How to do it.........Page 429
How it works.........Page 431
Ultrasonic reversing sensors......Page 432
Getting a sense of direction......Page 435
Getting ready......Page 436
How to do it.........Page 437
How it works.........Page 438
There's more.........Page 439
Calibrating the compass......Page 440
Calculating the compass bearing......Page 441
Saving the calibration......Page 443
Driving the robot using the compass......Page 444
Introduction......Page 447
Getting ready......Page 448
How to do it.........Page 452
There's more.........Page 456
Sending RF control signals directly......Page 457
Determining the structure of the remote control codes......Page 460
Using SPI to control an LED matrix......Page 461
Getting ready......Page 464
How to do it.........Page 467
How it works.........Page 472
Daisy-chain SPI configuration......Page 474
Communicating using a serial interface......Page 475
Getting ready......Page 476
How to do it.........Page 478
How it works.........Page 484
RS232 signals and connections......Page 485
Using the GPIO built-in serial pins......Page 486
The RS232 loopback......Page 488
Controlling Raspberry Pi using Bluetooth......Page 490
Getting ready......Page 491
How to do it.........Page 492
Configuring Bluetooth module settings......Page 495
Controlling USB devices......Page 496
Getting ready......Page 497
How to do it.........Page 498
How it works.........Page 502
Controlling similar missile-type devices......Page 503
Robot arm......Page 505
Taking USB control further......Page 506
Computing the Euclidean distance score......Page 507
How to do it.........Page 508
How to do it.........Page 510
Finding similar users in the dataset......Page 513
How to do it.........Page 514
How to do it.........Page 515
Applications of recommender systems......Page 518
Introduction......Page 519
Makers, hobbyists, and Raspberry Pi specialists......Page 520
Chapter 9......Page 521
Chapter 11......Page 523
Chapter 12......Page 524
Chapter 14......Page 525
Chapter 1......Page 526
Chapter 3......Page 527
Chapter 6......Page 528
Chapter 9......Page 529
Chapter 11......Page 530
Chapter 13......Page 531
APT commands......Page 532
Pip Python package manager commands......Page 533
Other Books You May Enjoy......Page 534
Index......Page 537