add fona code

Author: brentru

code.py

@@ -0,0 +1,82 @@
+import time
+import board
+import busio
+import digitalio
+from adafruit_fona.adafruit_fona import FONA
+import adafruit_bme280
+
+print("FONA SMS Sensor")
+
+# Create a serial connection for the FONA connection
+uart = busio.UART(board.TX, board.RX)
+rst = digitalio.DigitalInOut(board.D5)
+
+# Initialize FONA module (this may take a few seconds)
+fona = FONA(uart, rst, debug=True)
+
+# Initialize BME280 Sensor
+i2c = busio.I2C(board.SCL, board.SDA)
+bme280 = adafruit_bme280.Adafruit_BME280_I2C(i2c)
+
+# Initialize Network
+while fona.network_status != 1:
+    print("Connecting to network...")
+    time.sleep(1)
+print("Connected to network!")
+print("RSSI: %ddB" % fona.rssi)
+
+# Enable FONA SMS notification
+fona.enable_sms_notification = True
+
+# store incoming notification info
+notification_buf = bytearray(64)
+
+print("FONA Ready!")
+while True:
+    if fona.in_waiting: # data is available from FONA
+        notification_buf = fona._read_line()[1]
+        # Split out the sms notification slot num.
+        notification_buf = notification_buf.decode()
+        sms_slot = notification_buf.split(",")[1]
+
+        print("NEW SMS!\n\t Slot: ", sms_slot)
+
+        # Get SMS message and address
+        sender, message = fona.read_sms(sms_slot)
+        print("FROM: ", sender)
+        print("MSG: ", message)
+
+        # Read BME280 sensor values
+        temp = bme280.temperature
+        humid = bme280.humidity
+        pres = bme280.pressure
+
+        # sanitize message 
+        message = message.lower()
+        message = message.strip()
+
+        if message in ['temp', 'temperature']:
+            response = "Temperature: %0.1f C" % temp
+        elif message in ['humid', 'humidity']:
+            response = "Humidity: %0.1f %%" % humid
+        elif message in ['pres', 'pressure']:
+            response = "Pressure: %0.1f hPa" % pres
+        elif message in ['state', 'status']:
+            response = "Temperature: {0:.2f}C\nHumidity: {1:.1f}% \
+                     Pressure: {2:.1f}hPa".format(temp, humid, pres)
+        else:
+            response = "Incorrect message format received"
+
+
+        print("Sending response: ", response)
+
+        # Send a response back to the sender
+        print("Sending response...")
+        if not fona.send_sms(int(sender), response):
+            print("SMS Send Failed")
+        print("SMS Sent!")
+
+        # Delete the original message
+        if not fona.delete_sms(sms_slot):
+            print("Could not delete SMS in slot", sms_slot)
+        print("OK!")