Recently I have been experimenting with building a digital radio using Arduino + Si4735 + pu2clr/SI4735. The FM functionality is basically working fine. Thanks to Ricardo Lima Caratti, the author of the pu2clr open source project, for providing such a convenient library. With correct circuit connections, the features can be implemented almost instantly.
After some simple testing, I decided to challenge the so‑called SSB single sideband patch. I ran into a small pitfall. Using the pu2clr example code: https://github.com/pu2clr/SI4735/blob/master/examples/TOOLS/SI47XX_09_SAVE_SSB_PATCH_EEPROM/SI47XX_09_SAVE_SSB_PATCH_EEPROM.ino, I attempted to write the SSB patch into an AT24C256 EEPROM. However, after executing the code, the data written was incorrect. All verification reads returned 0xFF. The patch name displayed in Arduino IDE Serial Monitor was garbled, and the size showed as 65535, corresponding to FF error data.