I have a ESP8266-ESP12 with 4MB flash and I'm trying to save user data on the unused space (above 0x0200000).
I'm having issues reading data from that addrres or any above 0x0080000.
spi_flash_read returns SPI_FLASH_RESULT_ERR.
If I use an address below that everything is alright.
Someone had a similar issue on: viewtopic.php?f=6&t=4886 but there's no answer there.
My flash is a BergMicro 25Q32ASSIG.