One thing that we can agree on is that QR codes, which originated in Japan, have now reached most of the world, and are used, most probably, way beyond what the inventors at Denso Wave intended—the automotive industry.
Flash Module GigaDevice GD25Q16 | RAK15001
The RAK15001 is a NOR flash module with a 16 MBit (2 MByte) nonvolatile memory. It uses GD25Q16CNIG (16 Mbit) from GigaDevice with a standard SPI interface. In this large memory, you can save big data that your applications need to access frequently, like conversion tables, lookup tables or images, and even sound files. Compared to the EEPROM module, the RAK15001 Flash Memory module has fewer write/erase cycles, so it is not ideal as storage for constantly changing data like for sensor readings.