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stm32-bootloader
Customizable Bootloader for STM32 microcontrollers. This example demonstrates how to perform in-application-programming of a firmware located on an external SD card with FAT32 file system.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Yes, unless you have something like an STM32 with a built-in bootloader. This can be used to update the regular bootloader. For example, this bootloader is capable of jumping to the built-in bootloader from software (as opposed to the "regular" method of pulling certain pins high or low at reset to cause the processor to run the built-in bootloader from ROM rather than the regular bootloader from flash).