{"product_id":"voltmeter-unit-ads1115","title":"Voltmeter Unit (ADS1115)","description":"\u003cdiv style=\"position: relative; padding-bottom: 55%; height: 0; overflow: hidden; max-width: 100%; border-radius: 8px; margin: 10px 0; box-shadow: 0 4px 12px rgba(0,0,0,0.1);\" class=\"custom-video-container\"\u003e\u003cvideo controls=\"controls\" muted=\"\" playsinline=\"\" style=\"position: absolute; top: -2%; left: 0; width: 100%; height: 100%;\"\u003e\n    \u003csource type=\"video\/mp4\" src=\"https:\/\/m5stack.oss-cn-shenzhen.aliyuncs.com\/video\/Product_example_video\/Unit\/VMeter.mp4\"\u003e\u003c\/video\u003e\u003c\/div\u003e\n\u003cstyle\u003e\n\/* ===== Scoped Description Style ===== *\/\n.product-description.rte {\n  font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, \"Helvetica Neue\", Arial, sans-serif;\n  color: #2c2c2c;\n  line-height: 1.65;\n  font-size: 16px;\n}\n\n\/* ===== Headings ===== *\/\n.product-description.rte h2 {\n  font-size: 1.8em;\n  color: 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.table-container table,\n  .product-description.rte .table-container thead,\n  .product-description.rte .table-container tbody,\n  .product-description.rte .table-container th,\n  .product-description.rte .table-container td,\n  .product-description.rte .table-container tr {\n    display: block;\n    width: 100%;\n  }\n  .product-description.rte .table-container thead {\n    display: none;\n  }\n  .product-description.rte .table-container tbody tr {\n    padding: 12px 0;\n    border-bottom: 1px solid #e6ebf2;\n  }\n  .product-description.rte .table-container tbody td {\n    padding: 8px 16px;\n    border: none;\n    text-align: left;\n  }\n  .product-description.rte .table-container tbody td:first-child {\n    width: 100%;\n    background: none;\n    color: #1f6fe5;\n    font-weight: 600;\n    padding-top: 16px;\n  }\n  .product-description.rte .table-container tbody td:last-child {\n    padding-bottom: 16px;\n    color: #2c2f36;\n    line-height: 1.6;\n  }\n\n  \/* Ensure button appears correctly on mobile *\/\n  .product-description.rte #learn-and-documents-btn {\n    font-size: 14px;\n    padding: 8px 16px;\n  }\n}\n\u003c\/style\u003e\n\u003ch2 data-id=\"Description\" id=\"description\"\u003eDescription\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eUnit VMeter\u003c\/strong\u003e is a voltage sensor capable of real-time voltage monitoring. It uses a 16-bit ADC converter ADS1115 and communicates via I2C (0x49). To ensure measurement accuracy, a built-in DC\/DC isolated power supply is provided, and the I2C interface is electrically isolated using a low-power isolator CA-IS3020S. This prevents noise and surges from the data bus or other circuits from entering the local ground terminal and interfering with or damaging sensitive circuits. Each \u003cstrong\u003eUnit VMeter\u003c\/strong\u003e is individually calibrated before leaving the factory, with a maximum measurement voltage of ±36V, an accuracy of 1% of full scale, ±1 digit.\u003c\/p\u003e\n\u003cdiv style=\"background: #fff8e1; border: 1px solid #ffe0a3; border-left: 4px solid #f9a825; border-radius: 8px; padding: 14px 16px; margin: 24px 0;\"\u003e\n\u003cstrong style=\"display: block; color: #8d6e00; font-size: 15px; margin-bottom: 6px;\"\u003e Calibration Parameters \u003c\/strong\u003e \u003cspan style=\"color: #2c2c2c; font-size: 14.5px; line-height: 1.6;\"\u003e The EEPROM (0x53) has built-in calibration parameters from the factory. Do not write to the EEPROM, otherwise the calibration data will be overwritten, resulting in inaccurate measurement results. \u003c\/span\u003e\n\u003c\/div\u003e\n\u003ch2 data-id=\"Features\" id=\"features\"\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e±36V range\u003c\/li\u003e\n\u003cli\u003e16-bit ADC conversion\u003c\/li\u003e\n\u003cli\u003eResolution: 1mV at ≤16V, 7.9mV above 16V\u003c\/li\u003e\n\u003cli\u003eAccuracy: 1% of full scale, ±1 digit\u003c\/li\u003e\n\u003cli\u003eLED power indicator\u003c\/li\u003e\n\u003cli\u003eNo recalibration required (EEPROM pre-written at factory)\u003c\/li\u003e\n\u003cli\u003eBuilt-in CA-IS3020S isolation chip for anti-interference\u003c\/li\u003e\n\u003cli\u003eIsolated DC-DC\u003c\/li\u003e\n\u003cli\u003eIsolation withstand voltage up to 1000 VRMS\u003c\/li\u003e\n\u003cli\u003eDevelopment Platforms: Arduino, UiFlow (Blockly, Python)\u003c\/li\u003e\n\u003cli\u003e2 x LEGO compatible holes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-id=\"Includes\" id=\"includes\"\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Unit VMeter\u003c\/li\u003e\n\u003cli\u003e1 x HY2.0-4P Grove Cable (20cm)\u003c\/li\u003e\n\u003cli\u003e1 x VH3.96-4P Terminal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-id=\"Applications\" id=\"applications\"\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVoltmeter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-id=\"Specifications\" id=\"specifications\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"table-container\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e7.9mV @ 16V reading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e±36V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eI2C Communication @0x49\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Size\u003c\/td\u003e\n\u003ctd\u003e56.0 x 24.0 x 8.0mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Weight\u003c\/td\u003e\n\u003ctd\u003e8.2g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Size\u003c\/td\u003e\n\u003ctd\u003e138.0 x 93.0 x 9.0mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e16.5g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eLearn and Documents\u003c\/h2\u003e\n → DOCUMENTS \n\u003c\/div\u003e","brand":"m5stack-store","offers":[{"title":"Default Title","offer_id":53774128775533,"sku":"ljw1787247090680","price":15.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0526\/9869\/files\/voltmeter-unit-ads1115_1.jpg?v=1787247097","url":"https:\/\/www.ruralgoods.shop\/products\/voltmeter-unit-ads1115","provider":"My Store","version":"1.0","type":"link"}