static s32_t api_spiffs_write(u32_t addr, u32_t size, u8_t *src) {
    flashmem_write(src, addr, size);
    return SPIFFS_OK;
}
uint32_t HttpFirmwareUpdate::writeFlash(char* data, uint32_t pos, int size)
{
	return flashmem_write(data, pos, size);
}