The WeMos D1 Mini family of boards is one of the latest additions to the ESP8266-based IoT ecosystem. The WeMos D1 Mini Real-Time Clock w/ SD Card Shield allows you to add a Real-Time Clock (RTC) to your WeMos mini or mini Pro development boards and log data to high-capacity flash by adding a single board. Using an RTC is the best way to keep track of time in your projects, for instance, when time-stamping data captured by a sensor (data logging). Using an SD card is the best way to store large amounts of data.
The WeMos D1 Mini RTC w/ SD Card Shield is designed so that pins D2 (SDA) and D1 (SCL) are connected to the DS1307 real-time clock chip's I2C pins onboard, and the SPI bus (pin D8 as CS) to the SD card adapter. The I2C interface of the shield has a fixed address of 0x68. The DS1307 RTC is a low-cost, low-power real-time clock IC that can maintain full clock and calendar, i.e., hours, minutes, seconds as well as year, month and day. As with all RTCs, it maintains track of time even if the microcontroller loses power using a backup CR1220 battery (not included).
The WeMos family is a great solution for building projects quickly using the ESP8266 SoC. Different users have different applications for the WeMos shields, thus we've found that the easiest way to please everyone is to ship the boards with the headers unsoldered. Each board in this kit includes a pair of Male, Female, Long Female pin headers for you to choose. Soldering is required for installing the header pins!
Features:
- DS1307 Interface: I2C (pins D2 (SDA) and D1 (SCL); default address: 0x68)
- SD Card Adapter Interface: SPI (pins D5 (CLK), D6 (DO), D7 (DI), and D8 (CS))
- Backup Battery Type: CR1220 (3.0VDC)
We have written useful guides for getting you started with the WeMos D1 Mini Real-Time Clock w/ SD Card Shield:
- http://youtube.com/acrobotic
