{"title":"DS3231 High Precision RTC Clock Module for Raspberry Pi B+","handle":"ds3231-high-precision-rtc-clock-module-for-raspberry-pi-b","url":"/products/ds3231-high-precision-rtc-clock-module-for-raspberry-pi-b","description":"A high-precision real-time clock (RTC) module based on the DS3231 IC, designed to plug directly into a Raspberry Pi B+ (and compatible with Arduino). The DS3231 maintains accurate timekeeping with ±5 ppm accuracy (±0.432 seconds per day) across −40 °C to +85 °C, and includes a coin cell battery backup to keep the clock running when the main board is powered off.\n\nThe module supports both 3.3 V and 5 V systems without level conversion, making it compatible with a wide range of boards. Communication is via I²C at up to 400 kHz.\n\nKey Features\n\n\nDS3231 RTC IC – High-precision timekeeping with ±5 ppm accuracy\n\nFull Calendar – Seconds, minutes, hours, day, date, month, and year with leap year compensation valid until 2100\n\nBattery Backup – Coin cell maintains time when main power is off\n\nTwo Alarms – Programmable calendar alarms\n\nTemperature Sensor – On-chip digital temperature sensor (±3 °C accuracy)\n\nClock Outputs – 1 Hz and 32.768 kHz square wave outputs\n\n3.3 V / 5 V Compatible – No level shifting required\n\n\nSpecifications\n\n\nRTC IC – DS3231\n\nAccuracy – ±5 ppm (−40 °C to +85 °C)\n\nInterface – I²C (up to 400 kHz)\n\nSupply Voltage – 2.3–5.5 V\n\nOperating Temperature – −40 °C to +85 °C\n\n\nIdeal For\n\nRaspberry Pi projects requiring accurate timekeeping\nData logging with timestamps\nAlarm clocks and scheduling systems\nArduino projects needing a battery-backed RTC\n\n\nResources\n\nDS3231 Datasheet (PDF)\nArduino Demo Code (ZIP)\n","vendor":"Elecrow","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":14412,"title":"Default Title","sku":"EC-RPA32311R","price":2.92,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":1,"option1":"Default Title"}]}