{"product_id":"ds3231-rtc-module-battery-backup-raspberry-pi","title":"DS3231 RTC Module with Battery Backup for Raspberry Pi","description":"\u003cp\u003eKeep your Raspberry Pi projects running on perfect time with the \u003cstrong\u003eDS3231 Real-Time Clock (RTC) Module with Battery Backup\u003c\/strong\u003e. Designed for makers, developers, and hobbyists alike, this compact and reliable RTC module ensures your single-board computer or microcontroller always knows the exact time — even when powered off or disconnected.\u003c\/p\u003e\n\n\u003cp\u003eBuilt around the precision \u003cstrong\u003eDS3231 temperature-compensated crystal oscillator (TCXO)\u003c\/strong\u003e, this module maintains exceptional timekeeping accuracy of \u003cstrong\u003e±5 ppm (±0.432 seconds\/day)\u003c\/strong\u003e across a wide operating temperature range of \u003cstrong\u003e-40°C to +85°C\u003c\/strong\u003e. The included coin-cell battery backup ensures continuous, uninterrupted timekeeping whenever your main power is removed.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Accuracy Timekeeping:\u003c\/strong\u003e DS3231 TCXO chip maintains ±5 ppm accuracy regardless of temperature fluctuations\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Backup:\u003c\/strong\u003e Coin-cell battery keeps the clock running when main power is off, ensuring seamless continuity\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Temperature Range:\u003c\/strong\u003e Operates reliably from -40°C to +85°C — suitable for indoor and outdoor electronics projects\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eI²C Interface:\u003c\/strong\u003e Simple two-wire communication for easy integration with Raspberry Pi, Arduino, ESP32, and other popular platforms\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Design:\u003c\/strong\u003e Low-profile PCB form factor fits neatly into project enclosures or breadboard setups\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Made from quality plastic and metal components for long-lasting reliability\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable in 2 color options\u003c\/strong\u003e to suit your project aesthetic\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible Platforms\u003c\/h2\u003e\n\u003cp\u003eThis RTC module is compatible with a wide range of popular development boards and microcontrollers, including:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRaspberry Pi (all models)\u003c\/li\u003e\n  \u003cli\u003eArduino (Uno, Nano, Mega, etc.)\u003c\/li\u003e\n  \u003cli\u003eESP32 \/ ESP8266\u003c\/li\u003e\n  \u003cli\u003eOther I²C-compatible microcontrollers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIdeal Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eData logging projects requiring accurate timestamps\u003c\/li\u003e\n  \u003cli\u003eHome automation systems\u003c\/li\u003e\n  \u003cli\u003eAlarm clocks and scheduling applications\u003c\/li\u003e\n  \u003cli\u003eIoT devices requiring offline time tracking\u003c\/li\u003e\n  \u003cli\u003eEducational electronics and STEM projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip:\u003c\/strong\u003e DS3231\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e I²C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±5 ppm (±0.432 sec\/day)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -40°C to +85°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterials:\u003c\/strong\u003e Plastic + Metal PCB construction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery:\u003c\/strong\u003e CR2032 coin cell (backup power)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWhether you're a seasoned electronics engineer or a curious beginner, this DS3231 RTC module is the perfect addition to your maker toolkit. A great value gift for anyone passionate about DIY electronics and Raspberry Pi projects.\u003c\/p\u003e\n\n\u003cp\u003eFor more information on electronics safety and best practices for hobbyist projects, visit the U.S. Consumer Product Safety Commission (CPSC).\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is a DS3231 RTC module and what does it do for Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: The DS3231 Real-Time Clock (RTC) module is a small add-on board that provides accurate, battery-backed timekeeping to your Raspberry Pi or other microcontroller. Since the Raspberry Pi does not have a built-in hardware clock, it relies on internet time servers when connected. The DS3231 RTC module solves this by maintaining the correct date and time locally — even when the Pi is powered off — using its precision temperature-compensated oscillator and a coin-cell battery backup.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How accurate is the DS3231 RTC module?\u003c\/h4\u003e\n\u003cp\u003eA: The DS3231 chip offers industry-leading timekeeping accuracy of ±5 ppm, which translates to approximately ±0.432 seconds per day. Its built-in temperature-compensated crystal oscillator (TCXO) automatically adjusts for temperature changes within a -40°C to +85°C range, ensuring consistent accuracy across varying environments.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How long does the battery backup last?\u003c\/h4\u003e\n\u003cp\u003eA: With a standard CR2032 coin-cell battery, the RTC module can maintain accurate timekeeping for several years when operating solely on battery power (i.e., when the main board is unpowered). During normal operation — when connected to your Raspberry Pi or other board — the module draws power from the host device, preserving battery life even further.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this module compatible with Arduino and ESP32, or only Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: This DS3231 RTC module is compatible with any microcontroller or single-board computer that supports the I²C communication protocol. This includes Raspberry Pi (all models), Arduino (Uno, Nano, Mega), ESP32, ESP8266, and many others. Libraries for integrating this module are freely available for all major platforms.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is a DS3231 RTC module and what does it do for Raspberry Pi?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The DS3231 Real-Time Clock (RTC) module is a small add-on board that provides accurate, battery-backed timekeeping to your Raspberry Pi or other microcontroller. Since the Raspberry Pi does not have a built-in hardware clock, it relies on internet time servers when connected. 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