{"id":16,"date":"2017-03-29T19:33:57","date_gmt":"2017-03-29T19:33:57","guid":{"rendered":"https:\/\/arduinoforlammers.wordpress.com\/?p=16"},"modified":"2022-11-17T17:55:59","modified_gmt":"2022-11-17T16:55:59","slug":"ekspander_pcf8574","status":"publish","type":"post","link":"http:\/\/adsl_zapas.dkonto.pl\/index.php\/ekspander_pcf8574\/","title":{"rendered":"Ekspander PCF8574"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">W tym po\u015bcie pokazuj\u0119 jak po\u0142\u0105czy\u0107 wy\u015bwietlacz LCD z&nbsp;Arduino korzystaj\u0105c z magistrali&nbsp;I2C. Dzi\u0119ki temu do komunikacji u\u017cyte s\u0105 tylko&nbsp;dwa piny plus zasilanie.<br>Pomaga nam w tym ekspander <a href=\"https:\/\/www.google.pl\/url?sa=t&amp;rct=j&amp;q=&amp;esrc=s&amp;source=web&amp;cd=2&amp;ved=0ahUKEwjotvGs0v7SAhUGApoKHX8rD6EQFggmMAE&amp;url=https%3A%2F%2Fwww.nxp.com%2Fdocuments%2Fdata_sheet%2FPCF8574.pdf&amp;usg=AFQjCNHXcUubJggVnex518pJjp0IqVE31g\">PCF8574P<\/a>. <br>Doda\u0142em te\u017c <a href=\"http:\/\/akademia.nettigo.pl\/starter_kit_030\/\">link<\/a>, z Akademii Nettigo, kt\u00f3ry pokazuje jak wykorzysta\u0107 uk\u0142ad w innych konfiguracjach. Jest tam te\u017c biblioteka expandera, kt\u00f3rej nale\u017cy u\u017cy\u0107<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>SPIS TRE\u015aCI<\/strong>\n<ul class=\"wp-block-list\">\n<li><a href=\"#part1\">Ekspander PCF8574 i LCD16\/2<\/a><\/li>\n\n\n\n<li><a href=\"#part2\">Inne wykorzystanie ekspandera<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<a name=\"part1\"><\/a>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"ekspander-pcf-i-wyswietlacz-lcd16-2\">Ekspander PCF i wy\u015bwietlacz LCD16\/2<\/h2>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"oto-schemat-polaczen-dla-arduino-uno-r3\"><strong>Oto schemat po\u0142\u0105cze\u0144 dla Arduino Uno R3:<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" class=\"editor-featured-image__preview-image\" src=\"https:\/\/arduinoforlammers.files.wordpress.com\/2017\/03\/zrzut-ekranu-2017-04-01-o-17-51-51.png?w=1462\"><em>Uwaga! Ja korzystam z Arduino Uno R3 i ma on wyprowadzone dodatkowo piny magistrali I2C tak jak na rysunku powy\u017cej. R\u00f3wnie dobrze mo\u017cna z ekspandera wyj\u015b\u0107 na piny&nbsp;A4 i A5, jak w tabelce.<\/em><\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"laczenie-z-innymi-platformami\"><strong>\u0141\u0105czenie z innymi&nbsp;platformami:<\/strong><\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Arduino boards<\/strong><\/td><td><strong><span class=\"wikiword\">I2C<\/span> \/ TWI pins<\/strong><\/td><\/tr><tr><td>Uno, Ethernet<\/td><td>A4 (SDA), A5 (SCL)<\/td><\/tr><tr><td>Mega2560<\/td><td>20 (SDA), 21 (SCL)<\/td><\/tr><tr><td>Leonardo<\/td><td>2 (SDA), 3 (SCL)<\/td><\/tr><tr><td>Due<\/td><td>20 (SDA), 21 (SCL), <span class=\"wikiword\">SDA1<\/span>, <span class=\"wikiword\">SCL1<\/span><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Potrzebne cz\u0119\u015bci:\n<ul class=\"wp-block-list\">\n<li><em>Potencjometr 10k.<\/em><\/li>\n\n\n\n<li><em>Expander PCF8574P<\/em><\/li>\n\n\n\n<li><em>Arduino Uno R3<\/em><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Biblioteki do instalacji:<br><\/strong>https:\/\/github.com\/fdebrabander\/Arduino-LiquidCrystal-I2C-library.git<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Kod 1:<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: csharp; light: false; title: Kod:; toolbar: true; notranslate\" title=\"Kod:\">\n#include  \/\/Standardowa biblioteka Arduino\n#include\nLiquidCrystal_I2C lcd(0x16,16,2);\nvoid setup()\n{\n  lcd.init(); \n\n  lcd.print(&quot;Hello, world!&quot;);\n}\n\nvoid loop()\n{\n}\n\n<\/pre><\/div>\n\n\n<a name=\"part2\"><\/a>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"uzycie-ukladu-pcf8574p-w-celu-zwiekszenia-ilosci-pinow\">U\u017cycie uk\u0142adu  PCF8574P w celu zwi\u0119kszenia ilo\u015bci pin\u00f3w<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tu u\u017cy\u0142em biblioteki: <a href=\"https:\/\/github.com\/xreef\/PCF8574_library\">https:\/\/github.com\/xreef\/PCF8574_library<\/a> kt\u00f3ra wydaje si\u0119 ciekawa i napisana te\u017c dla ESP8266<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"rozmieszczenie-pinow-pcf8574\">Rozmieszczenie pin\u00f3w PCF8574<\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/1.bp.blogspot.com\/-2oZWWk6WOYg\/VdLNo5s313I\/AAAAAAAADLE\/a51QpVPKTeM\/s1600\/PCF8574A%2Bpinouts.png\" alt=\"\"\/><\/figure>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: cpp; light: false; title: Kod:; toolbar: true; notranslate\" title=\"Kod:\">\n#include &quot;PCF8574.h&quot;\n\n\/\/ Set i2c address\nPCF8574 pcf8574(0x20);\n\nvoid setup()\n{\n\tSerial.begin(115200);\n\tdelay(1000);\n\tSerial.println(&quot;\\n\\nINIT&quot;);\n\n\tpcf8574.pinMode(P4, OUTPUT, LOW);\n\n\tSerial.print(&quot;\\nInit pcf8574...&quot;);\n\tif (pcf8574.begin()){\n\t\tSerial.println(&quot;OK&quot;);\n\t}else{\n\t\tSerial.println(&quot;KO&quot;);\n\t}\n}\nvoid loop()\n{\n  pcf8574.digitalWrite(P4, HIGH);\n  delay(1000);\n  pcf8574.digitalWrite(P4, LOW);\n  delay(1000);\n\t}\n\n<\/pre><\/div>\n\n\n<h4 class=\"wp-block-heading\" id=\"linki\"><strong>Linki:<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PCF8574 i2c digital I\/O expander: Arduino, esp8266 and esp32, rotary encoder \u2013 Part 2\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.mischianti.org\/2020\/03\/13\/pcf8574-i2c-digital-i-o-expander-rotary-encoder-part-2\/\">PCF8574 i2c digital I\/O expander: Arduino, esp8266 and esp32, rotary encoder \u2013 Part 2 \u2013 Renzo Mischianti<\/a><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Renzo Mischianti &#8211; WeMos D1 (esp8266): i2c shield to manage encoder, multiple buttons, and LEDs\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.mischianti.org\/2022\/02\/06\/wemos-d1-esp8266-i2c-shield-to-manage-encoder-multiple-buttons-and-leds\/\">WeMos D1 (esp8266): i2c shield to manage encoder, multiple buttons, and LEDs \u2013 Renzo Mischianti<\/a><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><a href=\"https:\/\/maxpromer.github.io\/LCD-Character-Creator\/\">https:\/\/maxpromer.github.io\/LCD-Character-Creator\/<\/a><\/li>\n\n\n\n<li>PCF8574 czyli jak \u0142atwo zwi\u0119kszy\u0107 liczb\u0119 pin\u00f3w w Arduino\n<ul class=\"wp-block-list\">\n<li><a href=\"http:\/\/akademia.nettigo.pl\/starter_kit_030\/\">PCF8574 czyli jak \u0142atwo zwi\u0119kszy\u0107 liczb\u0119 pin\u00f3w w Arduino &#8211; Akademia Nettigo<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">MicroPython<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/github.com\/mcauser\/micropython-pcf8574\">https:\/\/github.com\/mcauser\/micropython-pcf8574<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Post opisuje jak po\u0142\u0105czy\u0107 do Arduino wy\u015bwietlacz dzia\u0142aj\u0105cy na magistrali I2C.<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[2],"tags":[20,24],"class_list":["post-16","post","type-post","status-publish","format-standard","hentry","category-arduino","tag-lcd162","tag-pcf8574"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - aioseo.com -->\n\t<meta name=\"description\" content=\"Post opisuje jak po\u0142\u0105czy\u0107 do Arduino wy\u015bwietlacz dzia\u0142aj\u0105cy na 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