I need to save telemetry uint8_t data to EEPROM every 2 minutes. And retrieve it once a day. But writing every 2 minutes would require writing 262,800 per year. And I want these B Series to last on average at least 5 years. Thats 1.3 million writes. I will be writing only unsigned 8bit integers per write, so that might help. But, still, I’m hesitant to trust the B Series EEPROM for that kind of volume.
In the Boron EEPROM documentation is this: “Since the data is spread across a large number of flash sectors, flash erase-write cycle limits should not be an issue in general.”
So, should I not be worried about it? Can I write 1.3 million 8bit integers? Does the Particle firmware do good enough of a job of spreading this out that EEPROM will hold up?
The EEPROM on the Boron is simulated (so not a fixed byte-by-byte region) and further stored on an embedded file-system which provides built-in wear leveling and power-safe protection.
The littlefs is given a 2MB chunk on external SPI flash.
Thanks Joel for the heads up. Sounds like the old reality of having to deal with unreliable EEPROM might be over, at least with the Particle Nordic chips:)