ESP32 SPI master -> slave file transfer

Projects Networking, Protocols, and Devices
5

I've swapped HIGH/LOW as per below but still no change

  digitalWrite(SS, HIGH);
  hspi->beginTransaction(SPISettings(spiClk, MSBFIRST, SPI_MODE0));
  delay(100);
  hspi->transfer(spi_master_tx_buf, 32);

  // debug
  Serial.print("After transfer: ");
  for (size_t i = 0; i < 32; ++i)
    printf("%d ", spi_master_tx_buf[i]);
  printf("\n");

  digitalWrite(SS, LOW);
  hspi->endTransaction();