add RI pin to sms_response example

Author: brentru

adafruit_fona/adafruit_fona.py

@@ -449,7 +449,6 @@ def receive_sms(self):
         if self._ri is not None:  # poll the RI pin
             if self._ri.value:
                 return False, False
-
         if not self._uart.in_waiting:  # otherwise, poll the UART
             return False, False
 

examples/fona_sms_response.py

@@ -11,12 +11,14 @@
 # Create a serial connection for the FONA connection
 uart = busio.UART(board.TX, board.RX)
 rst = digitalio.DigitalInOut(board.D4)
+# Ring Indicator (RI) interrupt pin
+ri = digitalio.DigitalInOut(board.D5)
 
 # Use this for FONA800 and FONA808
-fona = FONA(uart, rst)
+fona = FONA(uart, rst, ri)
 
 # Use this for FONA3G
-# fona = FONA3G(uart, rst)
+# fona = FONA3G(uart, rst, ri)
 
 # Initialize Network
 while fona.network_status != 1: