├── .gitattributes ├── .gitignore ├── Diagrams ├── Board.pdf ├── Diagram.pdf ├── Ultraschall Sensoren_85_SMD.brd └── Ultraschall Sensoren_85_SMD.sch ├── README.md ├── ThreeSensors_Mega └── ThreeSensors_Mega.ino └── ThreeSensors_Tiny └── ThreeSensors_Tiny.ino /.gitattributes: -------------------------------------------------------------------------------- 1 | # Auto detect text files and perform LF normalization 2 | * text=auto 3 | 4 | # Custom for Visual Studio 5 | *.cs diff=csharp 6 | 7 | # Standard to msysgit 8 | *.doc diff=astextplain 9 | *.DOC diff=astextplain 10 | *.docx diff=astextplain 11 | *.DOCX diff=astextplain 12 | *.dot diff=astextplain 13 | *.DOT diff=astextplain 14 | *.pdf diff=astextplain 15 | *.PDF diff=astextplain 16 | *.rtf diff=astextplain 17 | *.RTF diff=astextplain 18 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Windows image file caches 2 | Thumbs.db 3 | ehthumbs.db 4 | 5 | # Folder config file 6 | Desktop.ini 7 | 8 | # Recycle Bin used on file shares 9 | $RECYCLE.BIN/ 10 | 11 | # Windows Installer files 12 | *.cab 13 | *.msi 14 | *.msm 15 | *.msp 16 | 17 | # Windows shortcuts 18 | *.lnk 19 | 20 | # ========================= 21 | # Operating System Files 22 | # ========================= 23 | 24 | # OSX 25 | # ========================= 26 | 27 | .DS_Store 28 | .AppleDouble 29 | .LSOverride 30 | 31 | # Thumbnails 32 | ._* 33 | 34 | # Files that might appear in the root of a volume 35 | .DocumentRevisions-V100 36 | .fseventsd 37 | .Spotlight-V100 38 | .TemporaryItems 39 | .Trashes 40 | .VolumeIcon.icns 41 | 42 | # Directories potentially created on remote AFP share 43 | .AppleDB 44 | .AppleDesktop 45 | Network Trash Folder 46 | Temporary Items 47 | .apdisk 48 | -------------------------------------------------------------------------------- /Diagrams/Board.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/SensorsIot/ThreeSensorsTiny/7c503aa3d9ab44ac071f87a1d4b28cd4ddbe405d/Diagrams/Board.pdf -------------------------------------------------------------------------------- /Diagrams/Diagram.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/SensorsIot/ThreeSensorsTiny/7c503aa3d9ab44ac071f87a1d4b28cd4ddbe405d/Diagrams/Diagram.pdf -------------------------------------------------------------------------------- /Diagrams/Ultraschall Sensoren_85_SMD.brd: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127 | 128 | 129 | 130 | 131 | 132 | 133 | 134 | 135 | 136 | 137 | 138 | 139 | 140 | 141 | 142 | 143 | 144 | 145 | 146 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 157 | 158 | 159 | 160 | 161 | 162 | 163 | 164 | 165 | 166 | 167 | 168 | 169 | 170 | 171 | 172 | 173 | 174 | 175 | >Name 176 | 177 | 178 | 179 | 180 | 181 | 182 | 183 | 184 | Small Outline IC 185 | 186 | 187 | 188 | 189 | 190 | 191 | 192 | 193 | 194 | >NAME 195 | >VALUE 196 | 197 | 198 | 199 | 200 | 201 | 202 | 203 | 204 | 205 | 206 | 207 | 208 | 209 | 210 | 211 | 212 | 213 | 214 | 215 | 216 | 217 | 218 | 219 | 220 | 221 | 222 | >Name 223 | 224 | 225 | 226 | 227 | 228 | <h3>SparkFun Electronics' preferred foot prints</h3> 229 | In this library you'll find all manner of retired footprints for resistors, capacitors, board names, ICs, etc., that are no longer used in our catalog. 230 | We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com. 231 | 232 | Licensing:Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 233 | 234 | You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage. 235 | 236 | 237 | 238 | 239 | 240 | 241 | 242 | 243 | 244 | 245 | 246 | 247 | 248 | >NAME 249 | >VALUE 250 | 251 | 252 | 253 | 254 | 255 | 256 | 257 | 258 | 259 | 260 | 261 | 262 | 263 | EAGLE Design Rules 264 | 265 | Die Standard-Design-Rules sind so gewählt, dass sie für 266 | die meisten Anwendungen passen. Sollte ihre Platine 267 | besondere Anforderungen haben, treffen Sie die erforderlichen 268 | Einstellungen hier und speichern die Design Rules unter 269 | einem neuen Namen ab. 270 | EAGLE Design Rules 271 | 272 | The default Design Rules have been set to cover 273 | a wide range of applications. Your particular design 274 | may have different requirements, so please make the 275 | necessary adjustments and save your customized 276 | design rules under a new name. 277 | 278 | 279 | 280 | 281 | 282 | 283 | 284 | 285 | 286 | 287 | 288 | 289 | 290 | 291 | 292 | 293 | 294 | 295 | 296 | 297 | 298 | 299 | 300 | 301 | 302 | 303 | 304 | 305 | 306 | 307 | 308 | 309 | 310 | 311 | 312 | 313 | 314 | 315 | 316 | 317 | 318 | 319 | 320 | 321 | 322 | 323 | 324 | 325 | 326 | 327 | 328 | 329 | 330 | 331 | 332 | 333 | 334 | 335 | 336 | 337 | 338 | 339 | 340 | 341 | 342 | 343 | 344 | 345 | 346 | 347 | 348 | 349 | 350 | 351 | 352 | 353 | 354 | 355 | 356 | 357 | 358 | 359 | 360 | 361 | 362 | 363 | 364 | 365 | 366 | 367 | 368 | 369 | 370 | 371 | 372 | 373 | 374 | 375 | 376 | 377 | 378 | 379 | 380 | 381 | 382 | 383 | 384 | 385 | 386 | 387 | 388 | 389 | 390 | 391 | 392 | 393 | 394 | 395 | 396 | 397 | 398 | 399 | 400 | 401 | 402 | 403 | 404 | 405 | 406 | 407 | 408 | 409 | 410 | 411 | 412 | 413 | 414 | 415 | 416 | 417 | 418 | 419 | 420 | 421 | 422 | 423 | 424 | 425 | 426 | 427 | 428 | 429 | 430 | 431 | 432 | 433 | 434 | 435 | 436 | 437 | 438 | 439 | 440 | 441 | 442 | 443 | 444 | 445 | 446 | 447 | 448 | 449 | 450 | 451 | 452 | 453 | 454 | 455 | 456 | 457 | 458 | 459 | 460 | 461 | 462 | 463 | 464 | 465 | 466 | 467 | 468 | 469 | 470 | 471 | 472 | 473 | 474 | 475 | 476 | 477 | 478 | 479 | 480 | 481 | 482 | 483 | 484 | 485 | 486 | 487 | 488 | 489 | 490 | 491 | 492 | 493 | 494 | 495 | 496 | 497 | 498 | 499 | 500 | 501 | 502 | 503 | 504 | 505 | 506 | 507 | 508 | 509 | 510 | 511 | 512 | 513 | 514 | 515 | 516 | 517 | 518 | 519 | 520 | 521 | 522 | 523 | 524 | 525 | 526 | 527 | 528 | 529 | 530 | 531 | 532 | 533 | 534 | 535 | 536 | 537 | 538 | 539 | 540 | 541 | 542 | 543 | 544 | 545 | 546 | 547 | 548 | 549 | 550 | 551 | 552 | 553 | 554 | 555 | 556 | 557 | 558 | 559 | 560 | 561 | 562 | 563 | 564 | 565 | 566 | 567 | 568 | 569 | 570 | 571 | 572 | 573 | 574 | 575 | 576 | 577 | 578 | 579 | 580 | 581 | 582 | 583 | 584 | 585 | 586 | 587 | 588 | 589 | 590 | 591 | 592 | 593 | 594 | 595 | 596 | 597 | 598 | 599 | 600 | 601 | 602 | -------------------------------------------------------------------------------- /Diagrams/Ultraschall Sensoren_85_SMD.sch: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127 | 128 | 129 | 130 | 131 | 132 | 133 | 134 | 135 | 136 | 137 | 138 | 139 | 140 | 141 | 142 | 143 | 144 | 145 | 146 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 157 | 158 | 159 | 160 | 161 | 162 | 163 | 164 | 165 | >Name 166 | 167 | 168 | 169 | 170 | 171 | 172 | 173 | 174 | Small Outline IC 175 | 176 | 177 | 178 | 179 | 180 | 181 | 182 | 183 | 184 | >NAME 185 | >VALUE 186 | 187 | 188 | 189 | 190 | 191 | 192 | 193 | 194 | 195 | 196 | 197 | 198 | 199 | 200 | 201 | 202 | 203 | 204 | 205 | 206 | 207 | 208 | 209 | 210 | 211 | 212 | >Name 213 | 214 | 215 | 216 | 217 | 218 | 219 | 220 | 221 | 222 | 223 | 224 | 225 | 226 | SR-04 227 | >VALUE 228 | 229 | 230 | 231 | 232 | 233 | 234 | 235 | 236 | 237 | 238 | >VALUE 239 | 240 | 241 | 242 | 243 | 244 | 245 | >NAME 246 | >VALUE 247 | 248 | 249 | 250 | 251 | 252 | 253 | 254 | 255 | 256 | 257 | 258 | 259 | 260 | 261 | 262 | 263 | 264 | 265 | SRF-05 266 | >VALUE 267 | 268 | 269 | 270 | 271 | 272 | 273 | 274 | 275 | 276 | 277 | 278 | 279 | 280 | 281 | 282 | 283 | 284 | 285 | 286 | 287 | 288 | 289 | 290 | 291 | 292 | 293 | 294 | 295 | 296 | 297 | 298 | 299 | 300 | 301 | 302 | 303 | 304 | 305 | 306 | 307 | 308 | 309 | 310 | 311 | 312 | 313 | 314 | 315 | 316 | 317 | 318 | 319 | 320 | 321 | 322 | 323 | 324 | 325 | 326 | 327 | 328 | 329 | 330 | 331 | 332 | 333 | 334 | 335 | 336 | 337 | 338 | 339 | 340 | 341 | 342 | 343 | 344 | 345 | 346 | 347 | 348 | 349 | 350 | 351 | Supply Symbols 352 | GND, VCC, 0V, +5V, -5V, etc. 353 | Please keep in mind, that these devices are necessary for the 354 | automatic wiring of the supply signals. 355 | The pin name defined in the symbol is identical to the net which is to be wired automatically. 356 | In this library the device names are the same as the pin names of the symbols, therefore the correct signal names appear next to the supply symbols in the schematic. 357 | <author>Created by librarian@cadsoft.de</author> 358 | 359 | 360 | 361 | 362 | 363 | 364 | >VALUE 365 | 366 | 367 | 368 | 369 | 370 | SUPPLY SYMBOL 371 | 372 | 373 | 374 | 375 | 376 | 377 | 378 | 379 | 380 | 381 | 382 | 383 | 384 | 385 | <h3>SparkFun Electronics' preferred foot prints</h3> 386 | In this library you'll find non-functional items- supply symbols, logos, notations, frame blocks, etc. 387 | We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com. 388 | 389 | Licensing: Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 390 | 391 | You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage. 392 | 393 | 394 | 395 | 396 | 397 | >VALUE 398 | 399 | 400 | 401 | 402 | 403 | SUPPLY SYMBOL 404 | 405 | 406 | 407 | 408 | 409 | 410 | 411 | 412 | 413 | 414 | 415 | 416 | 417 | 418 | <h3>SparkFun Electronics' preferred foot prints</h3> 419 | In this library you'll find all manner of retired footprints for resistors, capacitors, board names, ICs, etc., that are no longer used in our catalog. 420 | We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com. 421 | 422 | Licensing:Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 423 | 424 | You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage. 425 | 426 | 427 | 428 | 429 | 430 | 431 | 432 | 433 | 434 | 435 | 436 | 437 | 438 | >NAME 439 | >VALUE 440 | 441 | 442 | 443 | 444 | 445 | 446 | 447 | 448 | >NAME 449 | >VALUE 450 | 451 | 452 | 453 | 454 | 455 | 456 | 457 | 458 | 10uF Tantalum SMT 459 | CAP-00811- 16V 10% (EIA-3216) 460 | 461 | 462 | 463 | 464 | 465 | 466 | 467 | 468 | 469 | 470 | 471 | 472 | 473 | 474 | 475 | 476 | 477 | 478 | 479 | 480 | 481 | 482 | 483 | 484 | 485 | 486 | 487 | 488 | 489 | 490 | 491 | 492 | 493 | 494 | 495 | 496 | 497 | 498 | 499 | 500 | 501 | 502 | 503 | 504 | 505 | 506 | 507 | 508 | 509 | PB1 Rechts 510 | PB3 Mitte 511 | PB4 Links 512 | 513 | 514 | 515 | 516 | 517 | 518 | 519 | 520 | 521 | 522 | 523 | 524 | 525 | 526 | 527 | 528 | 529 | 530 | 531 | 532 | 533 | 534 | 535 | 536 | 537 | 538 | 539 | 540 | 541 | 542 | 543 | 544 | 545 | 546 | 547 | 548 | 549 | 550 | 551 | 552 | 553 | 554 | 555 | 556 | 557 | 558 | 559 | 560 | 561 | 562 | 563 | 564 | 565 | 566 | 567 | 568 | 569 | 570 | 571 | 572 | 573 | 574 | 575 | 576 | 577 | 578 | 579 | 580 | 581 | 582 | 583 | 584 | 585 | 586 | 587 | 588 | 589 | 590 | 591 | 592 | 593 | 594 | 595 | 596 | 597 | 598 | 599 | 600 | 601 | 602 | 603 | 604 | 605 | 606 | 607 | 608 | 609 | 610 | 611 | 612 | 613 | 614 | 615 | 616 | 617 | 618 | 619 | 620 | 621 | 622 | 623 | 624 | 625 | 626 | 627 | 628 | 629 | 630 | 631 | 632 | 633 | 634 | 635 | 636 | 637 | 638 | 639 | 640 | 641 | 642 | 643 | 644 | 645 | 646 | 647 | 648 | 649 | 650 | 651 | 652 | 653 | 654 | 655 | 656 | 657 | 658 | 659 | 660 | 661 | 662 | 663 | 664 | 665 | 666 | 667 | 668 | 669 | 670 | 671 | 672 | 673 | 674 | 675 | 676 | 677 | 678 | 679 | 680 | 681 | 682 | 683 | 684 | 685 | 686 | 687 | 688 | 689 | 690 | 691 | 692 | 693 | 694 | 695 | 696 | 697 | 698 | 699 | 700 | 701 | 702 | Since Version 6.2.2 text objects can contain more than one line, 703 | which will not be processed correctly with this version. 704 | 705 | 706 | 707 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # ThreeSensorsTiny 2 | Three Ultrasonic sensors connected to a ATtiny and connected through I2C 3 | 4 | These are the sketches for the YouTube video: https://youtu.be/vj0SUYo8f_A 5 | 6 | They might include some errors. 7 | -------------------------------------------------------------------------------- /ThreeSensors_Mega/ThreeSensors_Mega.ino: -------------------------------------------------------------------------------- 1 | /* 2 | 3 | This sketch runs on an Arduino connected to an ATtiny85/45 running ThreeSensors_Tiny.ino 4 | 5 | The data received is HC-SR04 PING sensor data in centimeters 6 | */ 7 | 8 | 9 | #include 10 | 11 | int place; 12 | byte dist[3]; 13 | long entryP = 0; 14 | 15 | const int I2CSlaveAddress = 8; // I2C Address. 16 | 17 | 18 | void setup() 19 | { 20 | Wire.begin(); 21 | Serial.begin(115200); 22 | Serial.println("Setup"); 23 | } 24 | 25 | 26 | 27 | void loop() 28 | { 29 | Serial.print("L"); 30 | while (readTiny(I2CSlaveAddress) < 255) { 31 | Serial.print("WT"); // wait for first byte 32 | } 33 | for (place = 0; place < 3; place++) { 34 | dist[place] = readTiny(I2CSlaveAddress); 35 | } 36 | for (int i = 0; i < 3; i++) { 37 | Serial.print(dist[i]); 38 | Serial.print(" "); 39 | } 40 | Serial.println(); 41 | delay(200); 42 | } 43 | 44 | byte readTiny(int address) { 45 | byte hh ; 46 | long entry = millis(); 47 | Wire.requestFrom(address, 1); // The TinyWire library only allows for one byte to be requested at a time 48 | while (Wire.available() == 0 && (millis() - entry) < 100) Serial.print("W"); 49 | if (millis() - entry < 100) hh = Wire.read(); 50 | return hh; 51 | } 52 | -------------------------------------------------------------------------------- /ThreeSensors_Tiny/ThreeSensors_Tiny.ino: -------------------------------------------------------------------------------- 1 | 2 | 3 | /* 4 | 5 | This sketch runs on an ATtiny85 connected to an Arduino Mega running a receiver sketch 6 | This sketch gets distance data from three ultrasonic sensors and transmits it to the Arduino when requested 7 | 8 | Andreas Spiess, 2015 9 | 10 | */ 11 | 12 | #include // Requires fork by Rambo with onRequest support 13 | #include // NewPing version 1.7 14 | #include // watchdog 15 | 16 | #define SLEFT 0 17 | #define SRIGHT 2 18 | #define SMIDDLE 1 19 | 20 | 21 | #define LEFT_T PB1 22 | #define LEFT_E PB1 23 | 24 | #define MIDDLE_T PB3 25 | #define MIDDLE_E PB3 26 | 27 | #define RIGHT_T PB4 28 | #define RIGHT_E PB4 29 | 30 | #define MAX_DISTANCE 270 // Maximum distance we want to ping for (in centimeters). Maximum sensor distance is rated at 400-500cm. 31 | 32 | NewPing SensorLeft (LEFT_T, LEFT_E, MAX_DISTANCE); // Define left Sensor 33 | NewPing SensorMiddle (MIDDLE_T, MIDDLE_E, MAX_DISTANCE); // Define middle Sensor 34 | NewPing SensorRight (RIGHT_T, RIGHT_E, MAX_DISTANCE); // Define right Sensor 35 | 36 | 37 | const int I2CSlaveAddress = 8; // I2C Address. 38 | 39 | int distance[3]; // Where the Distance is stored (8 bit unsigned) 40 | int place = 0; 41 | unsigned long start; 42 | 43 | 44 | 45 | 46 | void setup() 47 | { 48 | TinyWireS.begin(I2CSlaveAddress); // Begin I2C Communication 49 | TinyWireS.onRequest(transmit); // When requested, call function transmit() 50 | 51 | wdt_enable(WDTO_500MS); // Watchdog 52 | } 53 | 54 | 55 | void loop() 56 | { 57 | readDistance(); 58 | wdt_reset(); // feed the watchdog 59 | } 60 | 61 | 62 | //------------------------------------------------------------------- 63 | 64 | void transmit() 65 | { 66 | byte hh; 67 | switch (place) { 68 | case 0: 69 | hh = 255; // start byte 70 | break; 71 | case 1: 72 | hh = distance[SLEFT]; // Send last recorded distance for current sensor 73 | break; 74 | case 2: 75 | hh = distance[SMIDDLE]; // Send last recorded distance for current sensor 76 | break; 77 | case 3: 78 | hh = distance[SRIGHT]; // Send last recorded distance for current sensor 79 | break; 80 | } 81 | TinyWireS.send(hh); 82 | place = place + 1; 83 | if (place > 3) place = 0; 84 | } 85 | 86 | void readDistance() 87 | { 88 | distance[SLEFT] = SensorLeft.ping_cm(); 89 | if (distance[SLEFT] > 254 ) { 90 | distance[SLEFT] = 254; 91 | } 92 | delay(20); 93 | distance[SMIDDLE] = SensorMiddle.ping_cm(); 94 | if (distance[SMIDDLE] > 254 ) { 95 | distance[SMIDDLE] = 254; 96 | } 97 | delay(20); 98 | distance[SRIGHT] = SensorRight.ping_cm(); 99 | if (distance[SRIGHT] > 254 ) { 100 | distance[SRIGHT] = 254; 101 | } 102 | delay(20); 103 | } 104 | 105 | 106 | 107 | 108 | --------------------------------------------------------------------------------