1  import time
 2  import board
 3  import busio
 4  from digitalio import DigitalInOut, Direction  # pylint: disable=unused-import
 5  import adafruit_miniesptool
 6  
 7  print("ESP32 Nina-FW")
 8  
 9  # Override these if you are manually wiring. Otherwise, this will use ESP pins from board.
10  tx = getattr(board, "ESP_TX", board.TX)
11  rx = getattr(board, "ESP_RX", board.RX)
12  resetpin = getattr(board, "ESP_RESET", board.D12)
13  gpio0pin = getattr(board, "ESP_GPIO0", board.D10)
14  
15  uart = busio.UART(tx, rx, baudrate=115200, timeout=1)
16  
17  esptool = adafruit_miniesptool.miniesptool(
18      uart, DigitalInOut(gpio0pin), DigitalInOut(resetpin), flashsize=4 * 1024 * 1024
19  )
20  esptool.sync()
21  
22  print("Synced")
23  print("Found:", esptool.chip_name)
24  if esptool.chip_name != "ESP32":
25      raise RuntimeError("This example is for ESP32 only")
26  esptool.baudrate = 912600
27  print("MAC ADDR: ", [hex(i) for i in esptool.mac_addr])
28  
29  # Note: Make sure to use the LATEST nina-fw binary release!
30  esptool.flash_file("NINA_W102-1.6.1.bin", 0x0, "0326db53e579f8a4293feac70d00f6bb")
31  
32  esptool.reset()
33  time.sleep(0.5)