adding code examples for Metro M7

Metro_M7_Examples/Digital_Input/code.py

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+# SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
+# SPDX-License-Identifier: MIT
+"""
+CircuitPython Digital Input Example - Blinking an LED using a button switch.
+"""
+import board
+import digitalio
+
+led = digitalio.DigitalInOut(board.LED)
+led.direction = digitalio.Direction.OUTPUT
+
+button = digitalio.DigitalInOut(board.D5)
+button.switch_to_input(pull=digitalio.Pull.UP)
+
+while True:
+    if not button.value:
+        led.value = True
+    else:
+        led.value = False

Metro_M7_Examples/WiFi/code.py

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+# SPDX-FileCopyrightText: 2019 ladyada for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+import os
+import board
+import busio
+from digitalio import DigitalInOut
+import adafruit_requests as requests
+import adafruit_esp32spi.adafruit_esp32spi_socket as socket
+from adafruit_esp32spi import adafruit_esp32spi
+
+print("ESP32 SPI webclient test")
+
+TEXT_URL = "http://wifitest.adafruit.com/testwifi/index.html"
+JSON_URL = "http://api.coindesk.com/v1/bpi/currentprice/USD.json"
+
+# If you are using a board with pre-defined ESP32 Pins:
+esp32_cs = DigitalInOut(board.ESP_CS)
+esp32_ready = DigitalInOut(board.ESP_BUSY)
+esp32_reset = DigitalInOut(board.ESP_RESET)
+
+spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
+esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)
+
+requests.set_socket(socket, esp)
+
+if esp.status == adafruit_esp32spi.WL_IDLE_STATUS:
+    print("ESP32 found and in idle mode")
+print("Firmware vers.", esp.firmware_version)
+print("MAC addr:", [hex(i) for i in esp.MAC_address])
+
+for ap in esp.scan_networks():
+    print("\t%s\t\tRSSI: %d" % (str(ap["ssid"], "utf-8"), ap["rssi"]))
+
+print("Connecting to AP...")
+while not esp.is_connected:
+    try:
+        esp.connect_AP(os.getenv('CIRCUITPY_WIFI_SSID'), os.getenv('CIRCUITPY_WIFI_PASSWORD'))
+    except OSError as e:
+        print("could not connect to AP, retrying: ", e)
+        continue
+print("Connected to", str(esp.ssid, "utf-8"), "\tRSSI:", esp.rssi)
+print("My IP address is", esp.pretty_ip(esp.ip_address))
+print(
+    "IP lookup adafruit.com: %s" % esp.pretty_ip(esp.get_host_by_name("adafruit.com"))
+)
+print("Ping google.com: %d ms" % esp.ping("google.com"))
+
+# esp._debug = True
+print("Fetching text from", TEXT_URL)
+r = requests.get(TEXT_URL)
+print("-" * 40)
+print(r.text)
+print("-" * 40)
+r.close()
+
+print()
+print("Fetching json from", JSON_URL)
+r = requests.get(JSON_URL)
+print("-" * 40)
+print(r.json())
+print("-" * 40)
+r.close()
+
+print("Done!")