Add Pico example and update gitignore

.gitignore

@@ -2,9 +2,17 @@
 #
 # SPDX-License-Identifier: Unlicense
 
+*.mpy
+.idea
 __pycache__
 _build
 *.pyc
-*.mpy
 .env
+.python-version
+build*/
 bundles
+*.DS_Store
+.eggs
+dist
+**/*.egg-info
+.vscode

examples/bme280_simpletest_pico.py

@@ -0,0 +1,26 @@
+# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+import busio
+import adafruit_bme280
+
+# Create sensor object, using the board's default I2C bus.
+i2c = busio.I2C(board.GP1, board.GP0) # SCL, SDA
+bme280 = adafruit_bme280.Adafruit_BME280_I2C(i2c)
+
+# OR create sensor object, using the board's default SPI bus.
+# spi = busio.SPI(board.GP2, MISO=board.GP0, MOSI=board.GP3)
+# bme_cs = digitalio.DigitalInOut(board.GP1)
+# bme280 = adafruit_bme280.Adafruit_BME280_SPI(spi, bme_cs)
+
+# change this to match the location's pressure (hPa) at sea level
+bme280.sea_level_pressure = 1013.25
+
+while True:
+    print("\nTemperature: %0.1f C" % bme280.temperature)
+    print("Humidity: %0.1f %%" % bme280.relative_humidity)
+    print("Pressure: %0.1f hPa" % bme280.pressure)
+    print("Altitude = %0.2f meters" % bme280.altitude)
+    time.sleep(2)