BG2GFC
The type of data stored needs to be determined based on the chip being used.
The 213, 215, and 216 chips I mentioned in my article have storage capacities of 144b, 504b, and 888b respectively. The M1 chip has storage capacities of 1K, 2K, and 4K, with different sub-models having different storage capacities.
This chip can write completely valid "Tonglian" content without any issues. Starting with the 215 chip, it is possible to write fully uncompressed "Tonglian" information. Furthermore, even with larger capacities, ADIF format "Tonglian" logs can be written.
Writing images is slightly difficult, the main problem being how to store them. One option would be to convert the images into base64 strings, which would take up more space, and the recipient would need to decode and reconstruct them as images, making it inefficient. It's better to directly write the text-formatted communication information.
It's no longer necessary to write QR codes, as NFC chips can already be programmed with URLs and text. Once attached, they can be read without scanning, which is much more convenient than using a QR code.
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