Pico: log sensor data to microSD with timestamps
Wire a microSD card to a Pico over SPI and write timestamped CSV sensor logs that survive power loss. The offline data logger pattern.
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#csv
2 tutorials
ESP32: log sensor data to a microSD card
Write timestamped CSV data from ESP32 sensors to a microSD card. FAT file basics, real timestamps, daily file rotation, and the flush pattern that survives power cuts.