In case of Arduino UNO, the SPI Pins are as follows: Hence, you have to identify the SPI Pins on your Arduino Board. First thing to remember is that the communication between Arduino and the SD Card Module is through SPI Interface.
Now that we have seen a little bit about the SD Card Module, let us proceed with interfacing one with Arduino. The following image shows the pins and components of an SD Card Module. So, the pins on an SD Card Module are as follows. Talking about pins, as I have mentioned that a Micro SD Card supports only SPI Communication, the SD Card Module has pins for SPI Communication. They are the 3.3V Voltage Regulator IC and a 5V to 3.3V Level Converter IC for the communication pins. Since Arduino operates at 5V and the Micro SD Card operates at 3.3V, a typical Micro SD Card Adapter or an SD Card Module basically consists of two important components.
The following is the image of a typical SD Card Module. Related Post: Basics of SPI CommunicationĪn SD Card Module or a Micro SD Card Adapter is a simple board which facilitates connection between a Micro SD card and a Microcontroller like Arduino. A Micro SD card supports SPI Communication. Almost all Micro SD Cards work in a voltage range of 2.7V to 3.6V (typically, 3.3V). It is non-volatile memory and is often used in mobile phones and other consumer electronic devices.īefore going to look at the SD Card Adapter, you need to understand two things about a typical Micro SD Card.įirst thing is the operating voltage. In order to do that, you have to use a MicroSD Card Adapter or an SD Card Module and understand about the Arduino SD Card Module Interface.Ī Micro SD Card is a flash based, removable memory device. In our case, if we want to record the data from a sensor using Arduino, we have to interface an SD Card with Arduino. Data Logging is already being implemented in several applications like Weather (Temperature), Agriculture (Soil Moisture), Automobiles (Crash Data), Aircrafts (Black Box), etc.
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All we did in those projects is hook-up a sensor with Arduino and view the sensor’s data on either an LCD or the Arduino IDE’s Serial Monitor.Īs soon as you power-off the Arduino, all the previous data read from the sensor is lost and there is now way you can retrieve that data.ĭata Logging is a process of recording data based on time or an event. with Arduino in several earlier projects. We have interfaced several sensors like Humidity, Temperature, RTC Clock, etc. Data Logging with Arduino SD Card Module Interface.A Brief Note on SD Card Module / Adapter.