{"id":4750,"date":"2026-03-12T06:59:41","date_gmt":"2026-03-12T13:59:41","guid":{"rendered":"https:\/\/www.donluc.com\/?p=4750"},"modified":"2026-03-12T06:59:41","modified_gmt":"2026-03-12T13:59:41","slug":"project-15-environment-aht20-temperature-and-humidity-mk35","status":"publish","type":"post","link":"https:\/\/www.donluc.com\/?p=4750","title":{"rendered":"Project #15: Environment &#8211; AHT20 Temperature and Humidity &#8211; Mk35"},"content":{"rendered":"<div style=\"width: 1200px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-4750-1\" width=\"1200\" height=\"675\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07W.mp4?_=1\" \/><a href=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07W.mp4\">https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07W.mp4<\/a><\/video><\/div>\n<p>&#8212;&#8212;<\/p>\n<p>#DonLucElectronics #DonLuc #FlameSensor #AHT20 #FireBeetle2ESP32E #ESP32 #Display #IoT #Project #Fritzing #Programming #Electronics #Microcontrollers #Consultant<\/p>\n<p>&#8212;&#8212;<\/p>\n<p><a href=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07a.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07a.jpg\" alt=\"AHT20 Temperature and Humidity\" width=\"720\" height=\"595\" class=\"alignnone size-full wp-image-4754\" srcset=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07a.jpg 720w, https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07a-300x248.jpg 300w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/a><\/p>\n<p>&#8212;&#8212;<\/p>\n<p><a href=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07b.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07b.jpg\" alt=\"AHT20 Temperature and Humidity\" width=\"720\" height=\"480\" class=\"alignnone size-full wp-image-4755\" srcset=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07b.jpg 720w, https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07b-300x200.jpg 300w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/a><\/p>\n<p>&#8212;&#8212;<\/p>\n<p><a href=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07c.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07c.jpg\" alt=\"AHT20 Temperature and Humidity\" width=\"720\" height=\"480\" class=\"alignnone size-full wp-image-4756\" srcset=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07c.jpg 720w, https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/03\/DL2602Mk07c-300x200.jpg 300w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/a><\/p>\n<p>&#8212;&#8212;-<\/p>\n<p><strong>Gravity: AHT20 Temperature and Humidity Sensor<\/strong><\/p>\n<p>The AHT20 is a high-precision but low-cost temperature and humidity sensor, which is equipped with an improved MEMS semiconductor capacitive humidity sensor element. It features standard I2C interface and a wide voltage supply of 2 Volt &#8211; 5 Volt, and with the simple peripheral circuit, it performs stably even in harsh environments in the measuring range of -40C ~ +85C. This sensor can be widely used for measuring the environmental temperature and humidity of home electronic equipment, the temperature and humidity of automobiles, and so on. <\/p>\n<p><strong>DL2602Mk07<\/strong><\/p>\n<p>1 x DFRobot FireBeetle 2 ESP32-E<br \/>\n1 x Fermion: 3.5\u201d 480&#215;320 TFT LCD Capacitive<br \/>\n1 x GDL Line 10 CM<br \/>\n1 x Gravity: AHT20 Temperature and Humidity Sensor<br \/>\n1 x Flame Sensor<br \/>\n1 x Crowtail &#8211; LED Green<br \/>\n1 x Gravity: IO Shield for FireBeetle 2<br \/>\n1 x Terminal Block Board for FireBeetle 2 ESP32-E IoT<br \/>\n1 x Lithium Ion Battery &#8211; 1000mAh<br \/>\n1 x USB 3.0 to Type-C Cable<\/p>\n<p><strong>DL2602Mk07p<\/strong><\/p>\n<p><strong>DL2602Mk07p.ino<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"arduino\" data-enlighter-title=\"\">\r\n\/****** Don Luc Electronics \u00a9 ******\r\nSoftware Version Information\r\nProject #15: Environment - AHT20 Temperature and Humidity - Mk35\r\n15-35\r\nDL2602Mk07p.ino\r\nDL2602Mk07\r\n1 x DFRobot FireBeetle 2 ESP32-E\r\n1 x Fermion: 3.5\u201d 480x320 TFT LCD Capacitive\r\n1 x GDL Line 10 CM\r\n1 x Gravity: AHT20 Temperature and Humidity Sensor\r\n1 x Flame Sensor\r\n1 x Crowtail - LED Green\r\n1 x Gravity: IO Shield for FireBeetle 2\r\n1 x Terminal Block Board for FireBeetle 2 ESP32-E IoT\r\n1 x Lithium Ion Battery - 1000mAh\r\n1 x Micro USB Cable\r\n*\/\r\n\r\n\/\/ Include the Library Code\r\n\/\/ EEPROM Library to Read and Write EEPROM with Unique ID for Unit\r\n#include &quot;EEPROM.h&quot;\r\n\/\/ DFRobot Display GDL API\r\n#include &lt;DFRobot_GDL.h&gt;\r\n\/\/ AHT20 Humidity and Temperature Sensor\r\n#include &lt;DFRobot_AHT20.h&gt;\r\n\r\n\/\/ AHT20 Humidity and Temperature Sensor\r\nDFRobot_AHT20 aht20;\r\n\/\/ AHT20 Humidity and Temperature Sensor\r\nfloat h = 0;\r\nfloat t = 0;\r\n\r\n\/\/ Flame Sensor\r\n\/\/ LED Green\r\nint iLEDG = D11;\r\n\/\/ Flame Sensor\r\nint iFlame =  A0;\r\nString sF = &quot;&quot;;\r\n\r\n\/\/ Defined ESP32\r\n#define TFT_DC  D2\r\n#define TFT_CS  D6\r\n#define TFT_RST D3\r\n\r\n\/*dc=*\/ \/*cs=*\/ \/*rst=*\/\r\n\/\/ DFRobot Display 320x480\r\nDFRobot_ILI9488_320x480_HW_SPI screen(TFT_DC, TFT_CS, TFT_RST);\r\n\r\n\/\/ Software Version Information\r\n\/\/ EEPROM Unique ID Information\r\n#define EEPROM_SIZE 64\r\nString uid = &quot;&quot;;\r\n\r\n\/\/ Software Version Information\r\nString sver = &quot;15-35&quot;;\r\n\r\nvoid loop() {\r\n  \r\n  \/\/ AHT20 Humidity and Temperature Sensor\r\n  isHT();\r\n  \r\n  \/\/ Flame Sensor\r\n  isFlame();\r\n\r\n  \/\/ isDisplay HT\r\n  isDisplayHT();\r\n\r\n  \/\/ Delay 0.1 Second\r\n  delay( 100 );\r\n\r\n}\r\n<\/pre>\n<p><strong>getDisplay.ino<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"arduino\" data-enlighter-title=\"\">\r\n\/\/ DFRobot Display 320x480\r\n\/\/ DFRobot Display 320x480 - UID\r\nvoid isDisplayUID(){\r\n\r\n  \/\/ DFRobot Display 320x480\r\n  \/\/ Text Display\r\n  \/\/ Text Wrap\r\n  screen.setTextWrap(false);\r\n  \/\/ Rotation\r\n  screen.setRotation(3);\r\n  \/\/ Fill Screen =&gt; black\r\n  screen.fillScreen(0x0000);\r\n  \/\/ Text Color =&gt; white\r\n  screen.setTextColor(0xffff);\r\n  \/\/ Font =&gt; Free Sans Bold 12pt\r\n  screen.setFont(&amp;FreeSansBold12pt7b);\r\n  \/\/ TextSize =&gt; 1.5\r\n  screen.setTextSize(1.5);\r\n  \/\/ Don Luc Electronics\r\n  screen.setCursor(0, 30);\r\n  screen.println(&quot;Don Luc Electronics&quot;);\r\n  \/\/ Tilt Switch\r\n  screen.setCursor(0, 60);\r\n  screen.println(&quot;Humidity and Temperature&quot;);\r\n  \/\/ Version\r\n  screen.setCursor(0, 90);\r\n  screen.println(&quot;Version&quot;);\r\n  screen.setCursor(0, 120);\r\n  screen.println( sver );\r\n  \/\/ EEPROM\r\n  screen.setCursor(0, 150);\r\n  screen.println(&quot;EEPROM&quot;);\r\n  screen.setCursor(0, 180);\r\n  screen.println( uid );\r\n\r\n}\r\n\/\/ isDisplay HT\r\nvoid isDisplayHT(){\r\n\r\n  \/\/ DFRobot Display 320x480\r\n  \/\/ Text Display\r\n  \/\/ Text Wrap\r\n  screen.setTextWrap(false);\r\n  \/\/ Rotation\r\n  screen.setRotation(3);\r\n  \/\/ Fill Screen =&gt; white\r\n  screen.fillScreen(0xffff);\r\n  \/\/ Text Color =&gt; blue\r\n  screen.setTextColor(0x001F);\r\n  \/\/ Font =&gt; Free Sans Bold 12pt\r\n  screen.setFont(&amp;FreeSansBold12pt7b);\r\n  \/\/ TextSize =&gt; 1.5\r\n  screen.setTextSize(1.5);\r\n  \/\/ Tilt Switch\r\n  screen.setCursor(0, 30);\r\n  screen.println(&quot;Humidity and Temperature&quot;);\r\n  screen.setCursor(0, 70);\r\n  screen.println( sF );\r\n  screen.setCursor(0, 120);\r\n  screen.println(&quot;Humidity&quot;);\r\n  screen.setCursor(0, 150);\r\n  screen.print( h );\r\n  screen.setCursor(65, 150);\r\n  screen.println( &quot;%RH&quot; );\r\n  screen.setCursor(0, 200);\r\n  screen.println(&quot;Temperature&quot;);\r\n  screen.setCursor(0, 230);\r\n  screen.print( t );\r\n  screen.setCursor(65, 230);\r\n  screen.println( &quot;C&quot; );\r\n\r\n}\r\n<\/pre>\n<p><strong>getEEPROM.ino<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"arduino\" data-enlighter-title=\"\">\r\n\/\/ isUID EEPROM Unique ID\r\nvoid isUID()\r\n{\r\n  \r\n  \/\/ Is Unit ID\r\n  uid = &quot;&quot;;\r\n  for (int x = 0; x &lt; 7; x++)\r\n  {\r\n    uid = uid + char(EEPROM.read(x));\r\n  }\r\n  \r\n}\r\n<\/pre>\n<p><strong>getFlame.ino<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"arduino\" data-enlighter-title=\"\">\r\n\/\/ Flame Sensor\r\n\/\/ is Tilt\r\nvoid isFlame(){\r\n\r\n  \/\/ Flame\r\n  \/\/ Check if Flame Sensor\r\n  if(digitalRead( iFlame) == 0 ){   \r\n    \r\n    \/\/ Turn LED HIGH\r\n    digitalWrite(iLEDG, HIGH);\r\n    sF = &quot;Fire Detected!!!&quot;;\r\n\r\n  } \r\n  else {\r\n    \r\n    \/\/ Turn LED LOW\r\n    digitalWrite(iLEDG, LOW);\r\n    sF = &quot;No Fire Detected!!!&quot;;\r\n    \r\n  }\r\n\r\n}\r\n<\/pre>\n<p><strong>getHT.ino<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"arduino\" data-enlighter-title=\"\">\r\n\/\/ AHT20 Humidity and Temperature Sensor\r\nvoid isHT(){\r\n\r\n  if(aht20.startMeasurementReady(true)){\r\n\r\n    \/\/ Humidity\r\n    h = aht20.getHumidity_RH();\r\n  \r\n   \/\/ Temperature\r\n   t = aht20.getTemperature_C();\r\n   }\r\n  \r\n}\r\n<\/pre>\n<p><strong>setup.ino<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"arduino\" data-enlighter-title=\"\">\r\n\/\/ Setup\r\nvoid setup()\r\n{\r\n \r\n  \/\/ Delay\r\n  delay( 100 );\r\n\r\n   \/\/ EEPROM Size\r\n  EEPROM.begin(EEPROM_SIZE);\r\n  \r\n  \/\/ EEPROM Unique ID\r\n  isUID();\r\n\r\n  \/\/ Delay\r\n  delay( 100 );\r\n \r\n  \/\/ DFRobot Display 320x480\r\n  screen.begin();\r\n\r\n  \/\/ Delay\r\n  delay( 100 );\r\n  \r\n  \/\/ Flame Sensor\r\n  \/\/ LED Green \r\n  pinMode(iLEDG, OUTPUT);\r\n  \/\/ Flame Sensor\r\n  pinMode(iFlame, INPUT);\r\n\r\n  \/\/ Delay\r\n  delay( 100 );\r\n\r\n  \/\/ AHT20 Humidity and Temperature Sensor\r\n  aht20.begin();\r\n  \r\n  \/\/ Delay\r\n  delay( 100 );\r\n\r\n  \/\/ DFRobot Display 320x480 - UID\r\n  \/\/ Don Luc Electronics\r\n  \/\/ Version\r\n  \/\/ EEPROM\r\n  isDisplayUID();\r\n\r\n  \/\/ Delay 5 Second\r\n  delay( 5000 );\r\n\r\n}\r\n<\/pre>\n<p>&#8212;&#8212;<\/p>\n<p><strong>People can contact us:<\/strong> https:\/\/www.donluc.com\/?page_id=1927<\/p>\n<p><strong>Consultant, R&#038;D, Electronics, IoT, Teacher and Instructor<\/strong><\/p>\n<ul>\n<li>Programming Language<\/li>\n<li>Single-Board Microcontrollers (PIC, Arduino, Raspberry Pi, Arm, Silicon Labs, Espressif, Etc&#8230;)<\/li>\n<li>IoT<\/li>\n<li>Wireless (Radio Frequency, Bluetooth, WiFi, Etc&#8230;)<\/li>\n<li>Robotics<\/li>\n<li>Automation<\/li>\n<li>Camera and Video Capture Receiver Stationary, Wheel\/Tank , Underwater and UAV Vehicle<\/li>\n<li>Unmanned Vehicles Terrestrial,  Marine and UAV<\/li>\n<li>Machine Learning<\/li>\n<li>Artificial Intelligence (AI)<\/li>\n<li>RTOS<\/li>\n<li>Sensors, eHealth Sensors, Biosensor, and Biometric<\/li>\n<li>Research &#038; Development (R &#038; D)<\/li>\n<li>Consulting<\/li>\n<\/ul>\n<p><strong>Follow Us<\/strong><\/p>\n<p><strong>Luc Paquin \u2013 Curriculum Vitae &#8211; 2026<\/strong><br \/>\nhttps:\/\/www.donluc.com\/luc\/LucPaquinCVEng2026Mk01.pdf<br \/>\nhttps:\/\/www.donluc.com\/luc\/<\/p>\n<p><strong>Web:<\/strong> https:\/\/www.donluc.com\/<br \/>\n<strong>Web:<\/strong> https:\/\/www.jlpconsultants.com\/<br \/>\n<strong>Facebook:<\/strong> https:\/\/www.facebook.com\/neosteam.labs.9\/<br \/>\n<strong>YouTube:<\/strong> https:\/\/www.youtube.com\/@thesass2063<br \/>\n<strong>DFRobot:<\/strong> https:\/\/learn.dfrobot.com\/user-10186.html<br \/>\n<strong>Elecrow:<\/strong> https:\/\/www.elecrow.com\/share\/sharepj\/center\/no\/760816d385ebb1edc0732fd873bfbf13<br \/>\n<strong>TikTok:<\/strong> https:\/\/www.tiktok.com\/@luc.paquin8<br \/>\n<strong>Hackster:<\/strong> https:\/\/www.hackster.io\/luc-paquin<br \/>\n<strong>LinkedIn:<\/strong> https:\/\/www.linkedin.com\/in\/jlucpaquin\/<\/p>\n<p><strong>Don Luc<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8212;&#8212; #DonLucElectronics #DonLuc #FlameSensor #AHT20 #FireBeetle2ESP32E #ESP32 #Display #IoT #Project #Fritzing #Programming #Electronics #Microcontrollers #Consultant &#8212;&#8212; &#8212;&#8212; &#8212;&#8212; &#8212;&#8212;- Gravity: AHT20 Temperature and Humidity Sensor The AHT20 is a high-precision but low-cost temperature and humidity sensor, which is equipped with an improved MEMS semiconductor capacitive humidity sensor element. It features standard I2C interface and a &#8230; <a title=\"Project #15: Environment &#8211; AHT20 Temperature and Humidity &#8211; Mk35\" class=\"read-more\" href=\"https:\/\/www.donluc.com\/?p=4750\" aria-label=\"Read more about Project #15: Environment &#8211; AHT20 Temperature and Humidity &#8211; Mk35\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[106,397,50,49,317,38,368,80,59,115,5,287,58,82,10],"tags":[418,6,92,102,4,320,87,369,19,107,83,85,24,9,84,27,33,34,108],"class_list":["post-4750","post","type-post","status-publish","format-standard","hentry","category-environment","category-arduino-digitalelectronics","category-arduino","category-consultant","category-dfrobot","category-digitalelectronics","category-elecrow","category-esp32","category-fritzing","category-e-mentor","category-microcontrollers","category-program","category-arduino-programming","category-program-esp32","category-projects","tag-aht20-temperature-and-humidity","tag-arduino","tag-battery","tag-components","tag-consultant","tag-dfrobot","tag-display","tag-elecrow","tag-electronics","tag-environment","tag-esp32","tag-fritzing","tag-microcontroller","tag-programming","tag-programming-esp32","tag-projects-2","tag-technology","tag-video-blog","tag-vlog"],"_links":{"self":[{"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/posts\/4750","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.donluc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4750"}],"version-history":[{"count":3,"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/posts\/4750\/revisions"}],"predecessor-version":[{"id":4760,"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/posts\/4750\/revisions\/4760"}],"wp:attachment":[{"href":"https:\/\/www.donluc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4750"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.donluc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4750"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.donluc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4750"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}