If you’re interested in the different types of memory that an Arduino can use, I’ve written a whole guide to that here: /arduino-memory-amount-guide/ 2. Read from the EEPROM using the following function call: EEPROM.get(address, data) įor more detail about how to use these functions (and the difference between put/get and write/read), the official Arduino reference is here.Track which addresses you’ve used (if needed you can store this at the start or end of the EEPROM, addresses start at 0 and each byte is addressed alternatively consider using a magic number).Write to the EEPROM using the following function call: EEPROM.put(address, data).
While EEPROM can be added to an Arduino, I’d typically recommend using the other data storage options in this guide (e.g. These include the MKR series and the Arduino Due. Some popular Arduino boards do not have EEPROM. using two bytes of memory for each reading).
The table below shows how much EEPROM space Arduino models have: Modelġ024 bytes can store about 500 temperature measurements (i.e. Current ‘state’ of the sketch, if your sketch represents a state machine, saving state information to the EEPROM can allow the Arduino to recover quickly after power failureĮEPROM can only store small amounts of data.Recent readings from a sensor, such as saving the last few measurements so that these can be recovered if the power is lost.Some of the ways I’ve seen this used include: Using EEPROM on an Arduino is generally a good idea when you have an unreliable power supply and need to quickly save small amounts of data to protect against power failure. EEPROM costs nothing to use if it’s included with your Arduino (see FRAM below if your board doesn’t have EEPROM). Think of EEPROM as a tiny flash drive built in to your Arduino. This means that data saved to the EEPROM can be read using a sketch even after the Arduino has been turned off and turned back on. EEPROMĮEPROM is a section of memory that is safe when the Arduino loses power. If your project involves working with data in any way, check out my complete guide here: /analyze-data-using-arduino/ 1.
I wrote this guide as part of a series on Arduino data analysis. To analyse data on another device, try storing the data in the cloud.To collect data over a long time that will be shared with a computer, try an SD card.To store small amounts of data, such as recent measurements, try the EEPROM.The best ways to store data depend on your project: Ways Arduino can store data collected from sensors
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