Product Details
This real-time clock (RTC) module uses the DS3232 chip. It integrates a crystal resonator and a temperature compensator, greatly enhancing long - term accuracy. In the temperature range of -40°C to +85°C, it maintains an accuracy of ±3.5ppm (±0.3024 seconds per day). The DS3232 comes with 236Byte SRAM storage, allowing for low - power data storage, making it ideal for IoT low - power collection scenarios. It has a battery input and can keep high - precision timing when the main power is cut off. The RTC provides detailed time and date information, can automatically adjust the date at the end of the month including leap - year corrections, and operates in either 24 - hour or 12 - hour format with AM/PM indicator. It also offers two programmable time - of - day alarms and a programmable square - wave output. The RST pin can be used as a push - button input for microprocessor reset. Note: Due to new air cargo regulations, the RTC module no longer includes batteries. The suitable button cell model is CR1220. You can buy the batteries locally. This product has features like internal crystal resonator for small deviation, internal temperature compensator for small temperature drift, a complete clock calendar function, two programmable alarms, and 236Byte SRAM. It can be used for event reminders, MCU external wake - up, clock and alarm output, and IoT data collection and storage. Its specifications include a power supply voltage of 3.3V - 5.5V, I2C address of 0x68, 236 Byte SRAM, a timing range from 1970 to 2100, a working temperature of -40°C to +85°C, a timing accuracy of ±3.5ppm, and a size of 22.5*21mm (0.89*0.83 inch). You can refer to the product wiki for more information. The shipping list includes one Fermion: DS3232 Precise RTC (Breakout) and one 2.54 - 7P Black Single Row Connector.
Using this Fermion DS3232 RTC module is easy. First, connect it to your device according to the connection diagram. Make sure to use the right power supply within the 3.3V - 5.5V range. If you want to use the battery - backup feature, you'll need to buy a CR1220 button cell locally as the module doesn't come with it. For setting the time and date, refer to the product wiki. You can program the two time - of - day alarms to suit your needs, like for event reminders. When it comes to maintenance, keep the module in a place within the -40°C to +85°C temperature range. Avoid exposing it to strong vibrations or extreme conditions. If you face any issues with the microprocessor reset, you can use the RST pin as a push - button input. And remember, the SRAM can store data at a low power, which is great for IoT applications. Just make sure you understand the I2C address (0x68) for proper communication with other devices.
