Description
The AK-SDFS-UART-B board allows you to read/write data from/to an SD card using a serial TTL port (UART). The board supports the FAT file system so the files can be read back from the SD on a PC/MAC.
Using a simple protocol (libraries included) you can read/write 4 files concurrently, in text or binary mode. Using only four wires (TX, RX, VCC and GND) you can read and write from the SD using very small microprocessors, even 8-bit ones. The baudrate can be adjusted from 9600 up to 460800 bps.
We have prepared a library that encapsulates the communication protocol and the source code can be downloaded. There is also an Arduino sketch demonstration available for download.
The AK-SDFS-UART-B is perfect to be used as a data logger, for sensors and debug information. It supports SD and SDHC cards.
We also have a micro SD version of this board.
Features
- Only four wires to get a working FAT File System
- Powered from 3.3V external supply
- All I/O pins are 5V tolerant
- Operates on 4 files concurrently
- RTC supported (time and date command has to be given at every power up)
- Supports all file commands as Open, Create, Exist, Close, Write, Flush, Read, Size
- Supports long file names
- Supports directory tree listing
- Commands to create and delete directories
- Supports binary files
- Uses a single and secure UART protocol. Source code examples are provided
- Breadboard-ready
- Supports firmware upgrade
Are the tx-rx pins 5V tolerant? Or you have to use a voltage level shifter for interfacing with microcontrollers?
Hi. Sorry for the late reply. All the pins except for RESET are 5V tolerant.