{"product_id":"type-2-esp32-based-4-digits-digital-objects-counter-with-relay-4-channels-rf-remote-control-wifi-support","title":"TYPE 3- ESP32 based 4 Digits Digital Objects Counter with Relay, 4 Channels RF remote control, WiFi Support","description":"\u003ch3\u003eThis product is NOT for sale in AUSTRALIA. Australians can purchase \u003ca href=\"https:\/\/buildcircuits.com\/collections\/counters\" rel=\"noopener\" target=\"_blank\"\u003ecounters without a relay\u003c\/a\u003e.\u003c\/h3\u003e\n\u003ch3\u003e\n\u003cstrong\u003e\u003ciframe width=\"750\" height=\"420\" src=\"https:\/\/www.youtube.com\/embed\/cT_bBT1QjOo\" title=\"Digital Objects Counter with Relay, RF Remote Control and Separate count transmitter\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis \u003cstrong\u003eESP32-powered 4-digit digital counter\u003c\/strong\u003e is a smart and versatile device designed to count objects automatically or manually. It can display values from \u003cstrong\u003e0 to 9999\u003c\/strong\u003e using a bright, colorful LED matrix display. The system uses a \u003cstrong\u003ephotoresistor–laser beam mechanism\u003c\/strong\u003e to detect passing objects and increment the count with precision.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0217\/9979\/6836\/files\/4digitsdigitalobjectscounterwithrelay_2.png?v=1786155617\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0217\/9979\/6836\/files\/how_does_it_work.jpg?v=1786149734\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eWith \u003cstrong\u003ebuilt-in WiFi\u003c\/strong\u003e, you can access a \u003cstrong\u003ebrowser-based control panel\u003c\/strong\u003e directly from your phone or computer—no app installation required. Simply connect to the ESP32’s WiFi access point and manage the counter wirelessly.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0217\/9979\/6836\/files\/App_33c2e931-e001-485a-bd1d-692186877e3a.jpg?v=1786155699\" alt=\"\" width=\"189\" height=\"422\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0217\/9979\/6836\/files\/how_does_it_work.jpg?v=1786149734\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eCommon Features:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAutomatic Object Counting:\u003c\/strong\u003e\u003cbr\u003eA \u003cstrong\u003elaser beam\u003c\/strong\u003e constantly shines on the \u003cstrong\u003ephotoresistor\u003c\/strong\u003e. When the beam is interrupted (object passes through), the counter increases by one. Users can restrict photoresistor from counting via web interface.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eManual Controls and RF remote control\u003c\/strong\u003e\u003cbr\u003eThree onboard buttons let you control the counter easily:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUP:\u003c\/strong\u003e Increase count manually\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDOWN:\u003c\/strong\u003e Decrease count manually\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRESET:\u003c\/strong\u003e Reset the counter to zero\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes RF remote control module\u003c\/strong\u003e\u003cbr\u003eSupports \u003cstrong\u003eRF remote control\u003c\/strong\u003e for wireless count up and count down\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWiFi Access \u0026amp; Web Control:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eConnect to WiFi network: SSID and password details will be given to customers.\u003ccode\u003e\u003c\/code\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOpen browser and visit \u003cstrong\u003e\u003ca rel=\"noopener\" class=\"decorated-link\" href=\"http:\/\/192.168.4.1\"\u003ehttp:\/\/192.168.4.1\u003cspan class=\"ms-0.5 inline-block align-middle leading-none\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" class=\"block h-[0.75em] w-[0.75em] stroke-current stroke-[0.75]\"\u003e\u003cuse href=\"\/cdn\/assets\/sprites-core-eri7ssmm.svg#304883\" fill=\"currentColor\"\u003e\u003c\/use\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAccess an intuitive web interface to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eIncrement or decrement the count remotely\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSet a specific count value, for example, 453\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAutomatically \u003cstrong\u003eturn ON a relay\u003c\/strong\u003e once the set count value is reached. Connect your device to the relay in normally CLOSED mode and when the count value is reached the relay will be turned ON and your connected device will be turned OFF.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0217\/9979\/6836\/files\/how_to_use_a_relay.jpg?v=1786164441\" alt=\"\" width=\"429\" height=\"286\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStop further counting\u003c\/strong\u003e after reaching the target value\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEnable or \u003cstrong\u003erestrict photoresistor-based counting\u003c\/strong\u003e when required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eChange display color\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eIntegrated \u003cstrong\u003erelay output\u003c\/strong\u003e for automation or external device control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCustomizable Display Colors:\u003c\/strong\u003e\u003cbr\u003eChoose from \u003cstrong\u003efive vivid colors\u003c\/strong\u003e — Yellow, Red, White, Green, and Blue — for the 4-digit display. Use web interface for changing colors. Colors are saved even power is turned off.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0217\/9979\/6836\/files\/6colors.jpg?v=1786153910\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eData Memory (Power Loss Protection):\u003c\/strong\u003e\u003cbr\u003eThe ESP32 automatically \u003cstrong\u003eremembers the last count and color settings\u003c\/strong\u003e, even after power disconnection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDisplay Options:\u003c\/strong\u003e\u003cbr\u003eCan be used with two display sizes,\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eP3 Display (3-inch digits)-\u003c\/strong\u003e\u003cspan class=\"Yjhzub\"\u003e192mm x 96mm Included\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eP5 Display (5-inch digits)- \u003c\/strong\u003e320mmx160mm- you can choose to purchase separately\u003cbr\u003eBoth use \u003cstrong\u003e64×32 LED matrix panels\u003c\/strong\u003e for clear, high-contrast numbers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePower Supply:\u003c\/strong\u003e\u003cbr\u003eWorks with \u003cstrong\u003e5V 4A power adapter\u003c\/strong\u003e \u003cem\u003e(not included)\u003c\/em\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePlug-and-Play Design:\u003c\/strong\u003e\u003cbr\u003eNo assembly required. Comes fully pre-wired and tested. \u003cem\u003e(Enclosure not included.)\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIncludes Laser Module:\u003c\/strong\u003e\u003cbr\u003eHigh-quality laser emitter included for reliable photoresistor detection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\n\u003cstrong\u003eCommunication with a separate TM1637 Mini Objects Counter:\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0217\/9979\/6836\/files\/Final_idea_image.png?v=1786158580\" alt=\"\" width=\"508\" height=\"508\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eIncludes a dedicated \u003cstrong\u003eHC-12 communication header\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports connection to a \u003ca href=\"https:\/\/buildcircuits.com\/products\/4-digits-digital-objects-counter-with-laser-wifi-esp32c3-tm1637\" rel=\"noopener\" target=\"_blank\"\u003eTM1637 \u003cstrong\u003emini objects counter\u003c\/strong\u003e\u003c\/a\u003e via HC-12 wireless module\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMini counter can be placed \u003cstrong\u003eanywhere within up to 200 meters range\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCounted values from the mini counter are \u003cstrong\u003ewirelessly transmitted\u003c\/strong\u003e to the main unit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMain unit displays the received count on a \u003cstrong\u003e64×32 dot matrix display\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIdeal for \u003cstrong\u003edistributed counting systems\u003c\/strong\u003e, long-distance counting, and automation setups\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications \u0026amp; Uses\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis counter is suitable for a wide range of \u003cstrong\u003eindustrial, commercial, and hobby projects\u003c\/strong\u003e, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFactory or workshop production lines\u003c\/strong\u003e – count items as they pass on a conveyor.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePeople counters\u003c\/strong\u003e – monitor entries or exits through a doorway.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEvent or game scoring systems\u003c\/strong\u003e – track scores or hits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDIY electronics projects\u003c\/strong\u003e – educational or experimental use.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInventory or packaging lines\u003c\/strong\u003e – automatic quantity tracking.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eExhibition and display counters\u003c\/strong\u003e – show live object or visitor counts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eGeneral Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"\"\u003eFeature\u003c\/th\u003e\n\u003cth class=\"\"\u003eDescription\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMicrocontroller\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eESP32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e64×32 RGB LED Matrix (P3 or P5)- Indoor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCounting Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0–9999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCounting Method\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePhotoresistor + Laser detection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManual Control\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 Buttons (UP, DOWN, RESET)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWireless Access\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eESP32 Access Point Mode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeb Interface URL\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ca rel=\"noopener\" class=\"decorated-link\" href=\"http:\/\/192.168.4.1\"\u003ehttp:\/\/192.168.4.1\u003cspan class=\"ms-0.5 inline-block align-middle leading-none\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" class=\"block h-[0.75em] w-[0.75em] stroke-current stroke-[0.75]\"\u003e\u003cuse href=\"\/cdn\/assets\/sprites-core-eri7ssmm.svg#304883\" fill=\"currentColor\"\u003e\u003c\/use\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V \/ 4A (adapter not included, purchase separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMemory Retention\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSaves count \u0026amp; color after power off\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed, Green, Blue, Yellow, White\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnclosure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Accessories\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLaser module, photoresistor module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003ePackage includes: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Objects Counter Module with relay and enclosure\u003c\/li\u003e\n\u003cli\u003e1 x Laser Module\u003c\/li\u003e\n\u003cli\u003e1 x P3 \u003cstrong\u003eINDOOR\u003c\/strong\u003e \u003cstrong\u003e64×32 dot matrix display- \u003c\/strong\u003e\u003cspan class=\"Yjhzub\"\u003e192mm x 96mm \u003c\/span\u003edisplay- DEFAULT\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e5V 4A power supply is not included.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's not included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou need to purchase these separately:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e5V 4A power supply(essential)\u003c\/li\u003e\n\u003cli\u003eRF remote control(Optional)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e P5 INDOOR \u003cstrong\u003e64×32 dot matrix display- \u003c\/strong\u003e\u003cspan class=\"Yjhzub\"\u003e320mmx160mm \u003c\/span\u003edisplay- OPTIONAL\u003c\/li\u003e\n\u003cli\u003e433Mhz RF Remote Control\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/buildcircuits.com\/products\/4-digits-digital-objects-counter-with-laser-wifi-esp32c3-tm1637\" rel=\"noopener\" target=\"_blank\"\u003eTM1637 mini objects counter\u003c\/a\u003e and HC-12 receiver and transmitter set\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"BUILDCIRCUITS","offers":[{"title":"P3- 192x96mm Display Counter with relay","offer_id":42596585472098,"sku":null,"price":120.0,"currency_code":"USD","in_stock":false},{"title":"P5- 320x160mm Display Counter with relay","offer_id":42596585504866,"sku":null,"price":145.0,"currency_code":"USD","in_stock":false},{"title":"TM1637 Counter Receiver\/ Transmitter set","offer_id":42596585537634,"sku":null,"price":50.0,"currency_code":"USD","in_stock":false},{"title":"433Mhz RF Remote Control","offer_id":42596585570402,"sku":null,"price":15.0,"currency_code":"USD","in_stock":false},{"title":"HC-12 Long range Remote Control-200m range","offer_id":43186975342690,"sku":null,"price":35.0,"currency_code":"USD","in_stock":false},{"title":"5V 4A power supply","offer_id":43186975375458,"sku":null,"price":15.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0217\/9979\/6836\/files\/main_front_image.png?v=1786166567","url":"https:\/\/buildcircuits.com\/products\/type-2-esp32-based-4-digits-digital-objects-counter-with-relay-4-channels-rf-remote-control-wifi-support","provider":"BUILDCIRCUITS","version":"1.0","type":"link"}