{"product_id":"cjmcu-219-ina219-i2c-bi-directional-current-power-sensor-module-cdn-0611","title":"CJMCU-219 INA219 I2C Bi-directional Current \/ Power Sensor Module – CDN-0611","description":"\u003ch1\u003eCJMCU-219 INA219 I2C Bi-directional Current \/ Power Sensor\u003c\/h1\u003e\n\u003cp\u003eThe CJMCU-219 module integrates the INA219 zero-drift, bi-directional current\/power monitor. It reports bus voltage, shunt voltage, current, and power over I2C with 1% accuracy. Use it to monitor battery charge\/discharge, solar panel output, or any DC load without breaking the circuit.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChip\u003c\/td\u003e\n\u003ctd\u003eINA219BID\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBus voltage range\u003c\/td\u003e\n\u003ctd\u003e0 – 26 V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCurrent range (with on-board 0.1 Ω shunt)\u003c\/td\u003e\n\u003ctd\u003e±3.2 A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax shunt voltage drop\u003c\/td\u003e\n\u003ctd\u003e±320 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.8 mA (12-bit)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eI2C, up to 4 selectable addresses\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-battery-load-tester\"\u003eBattery capacity tester using Arduino and a load resistor\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-solar-panel-tracker-kit-with-arduino-uno-plus-ldr\"\u003eSolar panel maximum power point tracker logging voltage\/current\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eUSB power monitor to measure exactly how much current your gadget draws\u003c\/li\u003e\n  \u003cli\u003eOver‑current protection circuit that alerts you via IoT platform\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with any 3.3V or 5V microcontroller that has I2C, such as Arduino Uno, Nano, Mega, ESP8266, ESP32, or Raspberry Pi. The module’s onboard LDO supplies the INA219 with 3.3V, so you can connect VCC to 3.3V or 5V. I2C logic levels are 3.3V, safe for all boards.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the load positive wire to the IN+ terminal and the power source positive to IN+. The module senses current on the high side. SDA and SCL lines connect to your microcontroller’s I2C pins; add 4.7kΩ pull‑up resistors if your board lacks them. Keep the input voltage under 26 V to avoid damaging the shunt.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes. Connect VCC to 5V, GND to GND, SDA to A4, SCL to A5. Use the Adafruit INA219 library to read values instantly.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I measure current above 3.2 A?\u003c\/summary\u003e\u003cp\u003eThe onboard 0.1 Ω shunt limits the range to ±3.2 A. You can replace the shunt resistor with a lower value (e.g., 0.01 Ω) to extend range, but recalibrate the library and mind power dissipation.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat does “no drift” mean?\u003c\/summary\u003e\u003cp\u003eThe INA219 uses a zero-drift architecture, so offset voltage remains stable over temperature and time. Measurements stay accurate without routine recalibration.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445122490733,"sku":"CDN-0611","price":100.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_ec24523d-14d9-4c37-86b1-4a46779293e8.jpg?v=1781513419","url":"https:\/\/compoden.com\/products\/cjmcu-219-ina219-i2c-bi-directional-current-power-sensor-module-cdn-0611","provider":"Compoden","version":"1.0","type":"link"}