{"id":4971,"date":"2026-09-23T09:11:04","date_gmt":"2026-09-23T16:11:04","guid":{"rendered":"https:\/\/www.donluc.com\/?p=4971"},"modified":"2026-09-23T09:11:04","modified_gmt":"2026-09-23T16:11:04","slug":"project-15-environment-c4002-mmwave-human-presence-sensor-mk47","status":"publish","type":"post","link":"https:\/\/www.donluc.com\/?p=4971","title":{"rendered":"Project #15: Environment \u2013 C4002 mmWave Human Presence Sensor \u2013 Mk47"},"content":{"rendered":"<div style=\"width: 1200px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-4971-1\" width=\"1200\" height=\"675\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/09\/DL2608Mk04W.mp4?_=1\" \/><a href=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/09\/DL2608Mk04W.mp4\">https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/09\/DL2608Mk04W.mp4<\/a><\/video><\/div>\n<p>&#8212;&#8212;<\/p>\n<p>#DonLucElectronics #DonLuc #C4002 #Environment #FireBeetle2ESP32E #ESP32 #Display #IoT #Project #Fritzing #Programming #Electronics #Microcontrollers #Consultant<\/p>\n<p>&#8212;&#8212;<br \/>\n<a href=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/09\/DL2608Mk04a.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/09\/DL2608Mk04a.jpg\" alt=\"C4002 mmWave Human Presence Sensor\" width=\"720\" height=\"572\" class=\"alignnone size-full wp-image-4973\" srcset=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/09\/DL2608Mk04a.jpg 720w, https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/09\/DL2608Mk04a-300x238.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\/09\/DL2608Mk04b.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/09\/DL2608Mk04b.jpg\" alt=\"C4002 mmWave Human Presence Sensor\" width=\"720\" height=\"480\" class=\"alignnone size-full wp-image-4974\" srcset=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/09\/DL2608Mk04b.jpg 720w, https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/09\/DL2608Mk04b-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\/09\/DL2608Mk04c.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/09\/DL2608Mk04c.jpg\" alt=\"C4002 mmWave Human Presence Sensor\" width=\"720\" height=\"480\" class=\"alignnone size-full wp-image-4975\" srcset=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/09\/DL2608Mk04c.jpg 720w, https:\/\/www.donluc.com\/wp-content\/uploads\/2026\/09\/DL2608Mk04c-300x200.jpg 300w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/a><\/p>\n<p>&#8212;&#8212;<\/p>\n<p><strong>Fermion: C4002 mmWave Human Presence Sensor<\/strong><\/p>\n<p>Traditional PIR sensors only see movement. The C4002 sees people, whether walking, sitting, sleeping, or working. Beyond Traditional PIR Limits, delivers &#8220;True Presence&#8221; Automation with Micro-Motion Detection. Traditional PIR sensors often fail to detect stationary occupants, leading to inconvenient lighting deactivation. The Fermion: C4002 mmWave radar module resolves this by utilizing 24GHz FMCW technology to detect micro-motions (such as breathing and chest expansion). Capable of distinguishing between moving, stationary, and micro-moving targets within a 10\u00d710 meter range, this module serves as a reliable core component for smart lighting, HVAC control, and security monitoring in Home Assistant and IoT systems.<\/p>\n<p><strong>DL2608Mk04<\/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 Fermion: C4002 mmWave Human Presence Sensor<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>DL2608Mk04p<\/strong><\/p>\n<p><strong>DL2608Mk04p.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 \u2013 C4002 mmWave Human Presence Sensor \u2013 Mk47\r\n15-47\r\nDL2608Mk04p.ino\r\nDL2608Mk04\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 Fermion: C4002 mmWave Human Presence Sensor\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 USB 3.0 to Type-C Cable\r\n*\/\r\n\r\n\/\/ Include the Library Code\r\n\/\/ DFRobot Display GDL API\r\n#include &lt;DFRobot_GDL.h&gt;\r\n\/\/ C4002 mmWave Human Presence\r\n#include &quot;DFRobot_C4002.h&quot;\r\n\r\n\/\/ C4002 mmWave Human Presence\r\nDFRobot_C4002 c4002(&amp;Serial1, 115200, \/*D0*\/ D11, \/*D1*\/ D10);\r\n\/\/float light;\r\nString sLight;\r\n\/\/ Get Target State\r\nString sTarget;\r\n\/\/ Get Presence distance gate target info\r\nString sPreDis;\r\n\/\/ Get motion distance gate index\r\nString sMot;\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\nString sver = &quot;15-47&quot;;\r\n\r\nvoid loop() {\r\n  \r\n  \/\/ isC4002\r\n  isC4002();\r\n  \r\n  \/\/ isDisplay C4002\r\n  isDisplayC4002();\r\n\r\n  \/\/ Delay 0.1 Second\r\n  delay( 100 );\r\n  \r\n}\r\n<\/pre>\n<p><strong>getC4002.ino<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"arduino\" data-enlighter-title=\"\">\r\n\/\/ C4002 mmWave Human Presence\r\n\/\/ isSetupC4002\r\nvoid isSetupC4002(){\r\n\r\n  \/\/ C4002 mmWave Human Presence\r\n  \/\/ Initialize the C4002 sensor\r\n  while (c4002.begin() != true) {\r\n    Serial.println(&quot;C4002 begin failed!&quot;);\r\n    delay(1000);\r\n  }\r\n  \/\/Serial.println(&quot;C4002 begin success!&quot;);\r\n  delay(50);\r\n\r\n  \/\/ Set the run led to On\r\n\r\n  if (c4002.setRunLedState(eLedOn)) {\r\n    \/\/Serial.println(&quot;Set run led success!&quot;);\r\n  } else {\r\n    Serial.println(&quot;Set run led failed!&quot;);\r\n  }\r\n  delay(50);\r\n\r\n  \/\/ Set the out led to On\r\n  if (c4002.setOutLedState(eLedOn)) {\r\n    \/\/Serial.println(&quot;Set out led success!&quot;);\r\n  } else {\r\n    Serial.println(&quot;Set out led failed!&quot;);\r\n  }\r\n  delay(50);\r\n\r\n  \/\/ Set the Resolution mode to 20cm.\r\n  \/\/ eResolution20Cm: This indicates that the resolution of the &quot;distance gate&quot;\r\n  \/\/ is 20cm. With a resolution of 20 cm, it supports up to 25 distance gates, \r\n  \/\/with a maximum distance of 4.9 meters\r\n  \/\/c4002.setResolutionMode(eResolution20Cm);\r\n  if (c4002.setResolutionMode(eResolution20Cm)) {\r\n    \/\/Serial.println(&quot;Set resolution mode success!&quot;);\r\n  } else {\r\n    Serial.println(&quot;Set resolution mode failed!&quot;);\r\n  }\r\n  delay(50);\r\n\r\n  \/\/ Set the detect range to 0-200 cm\r\n  uint16_t clostRange = 0;\r\n  uint16_t farRange   = 200;\r\n  if (c4002.setDetectRange(clostRange, farRange)) {    \/\/ Max detect range(0-1100cm)\r\n    \/\/Serial.println(&quot;Set detect range success!&quot;);\r\n  } else {\r\n    Serial.println(&quot;Set detect range failed!&quot;);\r\n  }\r\n\r\n  \/\/ Set the light threshold to 0 lux.range: 0-50 lux\r\n  if (c4002.setLightThresh(0)) {\r\n    \/\/Serial.println(&quot;Set light threshold success!&quot;);\r\n  } else {\r\n    Serial.println(&quot;Set light threshold failed!&quot;);\r\n  }\r\n  delay(50);\r\n\r\n  \/\/ Resolution mode:eResolution20Cm\r\n  \/\/ Enable the &#039;distance gate&#039;\r\n  \/\/ Resolution mode:eResolution20Cm,This means that the number of &#039;distance gates&#039; \r\n  \/\/ we can operate is 25\r\n  \/\/disable : C4002_DISABLE, enable: C4002_ENABLE\r\n  uint8_t gateState[25] = { C4002_ENABLE, C4002_ENABLE, C4002_ENABLE, C4002_ENABLE, \r\n  C4002_ENABLE, C4002_ENABLE, C4002_ENABLE, C4002_ENABLE, C4002_ENABLE,\r\n   C4002_ENABLE, C4002_ENABLE, C4002_ENABLE, C4002_ENABLE, C4002_ENABLE, \r\n   C4002_ENABLE, C4002_ENABLE, C4002_ENABLE, C4002_ENABLE, C4002_ENABLE, C4002_ENABLE,\r\n   C4002_ENABLE, C4002_ENABLE, C4002_ENABLE, C4002_ENABLE, C4002_ENABLE };\r\n\r\n  \/\/ Operation motion distance gate\r\n  if (c4002.configureGate(eMotionDistGate, gateState)) { \r\n    Serial.println(&quot;Enable motion distance gate success!&quot;);\r\n  }\r\n\r\n  \/\/ Delay\r\n  delay(50);\r\n\r\n  \/\/ Operation presence distance gate\r\n  if (c4002.configureGate(ePresenceDistGate, gateState)) { \r\n    Serial.println(&quot;Enable presence distance gate success!&quot;);\r\n  }\r\n  \r\n  \/\/ Delay\r\n  delay(50);\r\n\r\n  \/\/ Set the target disappear delay time to 1s\uff0crange: 0-65535s\r\n  if (c4002.setTargetDisappearDelay(1)) {\r\n    \/\/Serial.println(&quot;Set target disappear delay time success!&quot;);\r\n  } else {\r\n    Serial.println(&quot;Set target disappear delay time failed!&quot;);\r\n  }\r\n \r\n  \/\/ Delay\r\n  delay(50);\r\n\r\n  \/\/ Set the report period to 10 * 0.1s = 1s\r\n  if (c4002.setReportPeriod(10)) {\r\n    \/\/Serial.println(&quot;Set report period success!&quot;);\r\n  } else {\r\n    Serial.println(&quot;Set report period failed!&quot;);\r\n  }\r\n\r\n}\r\n\/\/ isC4002\r\nvoid isC4002(){\r\n\r\n  \/\/ Get all the results of the C4002 sensor\r\n  sRetResult_t retResult = c4002.getNoteInfo();\r\n\r\n  if (retResult.noteType == eResult) {\r\n    \/\/Serial.println(&quot;------- Get all results --------&quot;);\r\n    \/\/ get the light intensity\r\n    float light = c4002.getLightIntensity();\r\n    \/\/Serial.print(&quot;Light: &quot;);\r\n    \/\/Serial.print(light);\r\n    \/\/Serial.println(&quot; lux&quot;);\r\n    sLight = light;\r\n\r\n    \/\/ get Target state\r\n    eTargetState_t targetState = c4002.getTargetState();\r\n    \/\/Serial.print(&quot;Target state: &quot;);\r\n    if (targetState == eNoTarget) {\r\n\r\n      \/\/Serial.println(&quot;No Target&quot;);\r\n      sTarget = &quot;No Target&quot;;\r\n\r\n    } else if (targetState == ePresence) {\r\n      \r\n      \/\/Serial.println(&quot;Static Presence&quot;);\r\n      sTarget = &quot;Static Presence&quot;;\r\n\r\n    } else if (targetState == eMotion) {\r\n      \r\n      \/\/Serial.println(&quot;Motion&quot;);\r\n      sTarget = &quot;Motion&quot;;\r\n\r\n    }\r\n\r\n    \/\/ Get Presence distance gate target info\r\n    sPresenceTarget_t presenceTarget = c4002.getPresenceTargetInfo();\r\n    \/\/Serial.print(&quot;Presence distance: &quot;);\r\n    \/\/Serial.print(presenceTarget.distance);\r\n    sPreDis = presenceTarget.distance;\r\n    \/\/Serial.println(&quot; m&quot;);\r\n\r\n    \/\/ Get motion distance gate index\r\n    sMotionTarget_t motionTarget = c4002.getMotionTargetInfo();\r\n\r\n    \/\/Serial.print(&quot;Motion direction: &quot;);\r\n    if (motionTarget.direction == eAway) {\r\n      \r\n      \/\/Serial.println(&quot;Away!&quot;);\r\n      sMot = &quot;Away!&quot;;\r\n\r\n    } else if (motionTarget.direction == eNoDirection) {\r\n      \r\n      \/\/Serial.println(&quot;No Direction!&quot;);\r\n      sMot = &quot;No Direction!&quot;;\r\n\r\n    } else if (motionTarget.direction == eApproaching) {\r\n      \r\n      \/\/Serial.println(&quot;Approaching!&quot;);\r\n      sMot = &quot;Approaching!&quot;;\r\n\r\n    }\r\n  }\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 240x320\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  \/\/ BME280 Environmental\r\n  screen.setCursor(0, 60);\r\n  screen.println(&quot;C4002 Human Presence&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\r\n}\r\n\/\/ isDisplay C4002\r\nvoid isDisplayC4002(){\r\n\r\n  \/\/ DFRobot Display 240x320\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  \/\/ ENS160 Air Quality Sensor\r\n  screen.setCursor(0, 30);\r\n  screen.println(&quot;C4002 Human Presence&quot;);\r\n  \/\/ Status\r\n  screen.setCursor(0, 60);\r\n  screen.print(&quot;Light &quot;);\r\n  screen.setCursor(70, 60);\r\n  screen.print( sLight );\r\n  screen.setCursor(250, 60);\r\n  screen.println(&quot;lux&quot;);\r\n  \/\/ Target\r\n  screen.setCursor(0, 90);\r\n  screen.print(&quot;Target &quot;);\r\n  screen.setCursor(90, 90);\r\n  screen.println( sTarget );\r\n  \/\/ Presence\r\n  screen.setCursor(0, 120);\r\n  screen.print(&quot;Presence: &quot;);\r\n  screen.setCursor(130, 120);\r\n  screen.println( sPreDis );\r\n  screen.setCursor(250, 120);\r\n  screen.println( &quot;CM&quot; );\r\n  \/\/ \r\n  screen.setCursor(0, 150);\r\n  screen.print(&quot;Motion: &quot;);\r\n  screen.setCursor(110, 150);\r\n  screen.println( sMot );\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  Serial.begin(115200);\r\n\r\n    \/\/ Delay\r\n  delay( 100 );\r\n\r\n  \/\/ C4002 mmWave Human Presence\r\n  isSetupC4002();\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  \/\/ DFRobot Display 320x480 - UID\r\n  \/\/ Don Luc Electronics\r\n  \/\/ Versioc\r\n  isDisplayUID();\r\n  \r\n  \/\/ Delay\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>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 #C4002 #Environment #FireBeetle2ESP32E #ESP32 #Display #IoT #Project #Fritzing #Programming #Electronics #Microcontrollers #Consultant &#8212;&#8212; &#8212;&#8212; &#8212;&#8212; &#8212;&#8212; Fermion: C4002 mmWave Human Presence Sensor Traditional PIR sensors only see movement. The C4002 sees people, whether walking, sitting, sleeping, or working. Beyond Traditional PIR Limits, delivers &#8220;True Presence&#8221; Automation with Micro-Motion Detection. Traditional PIR sensors &#8230; <a title=\"Project #15: Environment \u2013 C4002 mmWave Human Presence Sensor \u2013 Mk47\" class=\"read-more\" href=\"https:\/\/www.donluc.com\/?p=4971\" aria-label=\"Read more about Project #15: Environment \u2013 C4002 mmWave Human Presence Sensor \u2013 Mk47\">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":[106,50,49,317,38,80,59,115,5,287,58,82,10],"tags":[6,92,437,102,4,320,87,19,107,83,85,24,9,84,27,248,34,108],"class_list":["post-4971","post","type-post","status-publish","format-standard","hentry","category-environment","category-arduino","category-consultant","category-dfrobot","category-digitalelectronics","category-esp32","category-fritzing","category-e-mentor","category-microcontrollers","category-program","category-arduino-programming","category-program-esp32","category-projects","tag-arduino","tag-battery","tag-c4002-mmwave-human-presence-sensor","tag-components","tag-consultant","tag-dfrobot","tag-display","tag-electronics","tag-environment","tag-esp32","tag-fritzing","tag-microcontroller","tag-programming","tag-programming-esp32","tag-projects-2","tag-sensors","tag-video-blog","tag-vlog"],"_links":{"self":[{"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/posts\/4971","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=4971"}],"version-history":[{"count":1,"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/posts\/4971\/revisions"}],"predecessor-version":[{"id":4976,"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/posts\/4971\/revisions\/4976"}],"wp:attachment":[{"href":"https:\/\/www.donluc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4971"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.donluc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4971"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.donluc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4971"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}