add example for using the pyportal's light sensor, and analog data readings

Author: brentru

examples/adafruit_io_simpletest_analog_in.py

@@ -0,0 +1,71 @@
+"""
+Example of reading an analog light sensor
+and sending the value to Adafruit IO
+"""
+import time
+import board
+import busio
+from analogio import AnalogIn
+from digitalio import DigitalInOut
+
+# ESP32 SPI
+from adafruit_esp32spi import adafruit_esp32spi, adafruit_esp32spi_wifimanager
+
+# Import Adafruit IO REST Client
+from adafruit_io.adafruit_io import RESTClient, AdafruitIO_RequestError
+
+# Delay between polling and sending light sensor data, in seconds
+SENSOR_DELAY = 30
+
+# Get wifi details and more from a secrets.py file
+try:
+    from secrets import secrets
+except ImportError:
+    print("WiFi secrets are kept in secrets.py, please add them there!")
+    raise
+
+# PyPortal ESP32 Setup
+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)
+wifi = adafruit_esp32spi_wifimanager.ESPSPI_WiFiManager(esp, secrets, board.NEOPIXEL)
+
+"""
+# ESP32 Setup
+esp32_cs = DigitalInOut(board.D9)
+esp32_ready = DigitalInOut(board.D10)
+esp32_reset = DigitalInOut(board.D5)
+spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
+esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)
+wifi = adafruit_esp32spi_wifimanager.ESPSPI_WiFiManager(esp, secrets, board.NEOPIXEL)
+"""
+
+# Set your Adafruit IO Username and Key in secrets.py
+# (visit io.adafruit.com if you need to create an account,
+# or if you need your Adafruit IO key.)
+ADAFRUIT_IO_USER = secrets['adafruit_io_user']
+ADAFRUIT_IO_KEY = secrets['adafruit_io_key']
+
+# Create an instance of the Adafruit IO REST client
+io = RESTClient(ADAFRUIT_IO_USER, ADAFRUIT_IO_KEY, wifi)
+
+try:
+    # Get the 'light' feed from Adafruit IO
+    light_feed = io.get_feed('light')
+except AdafruitIO_RequestError:
+    # If no 'light' feed exists, create one
+    light_feed = io.create_new_feed('light')
+
+# Set up an analog light sensor on the PyPortal
+adc = AnalogIn(board.LIGHT)
+
+while True:
+    light_value = adc.value
+    print('Light Level: ', light_value)
+    print('Sending to Adafruit IO...')
+    io.send_data(light_feed['key'], light_value)
+    print('Sent!')
+    # delay sending to Adafruit IO
+    time.sleep(SENSOR_DELAY)