close sockets properly, add cheerlights example

Author: brentru

adafruit_fona/adafruit_fona.py

@@ -686,14 +686,12 @@ def socket_close(self, sock_num, quick_close=1):
             sock_num < FONA_MAX_SOCKETS
         ), "Provided socket exceeds the maximum number of \
                                              sockets for the FONA module."
-        # eat prv. response
         self._read_line()
-        self._uart.write(b"AT+CIPCLOSE=" + str(sock_num).encode())
-        self._uart.write(b"," + str(quick_close).encode() + b"\r\n")
 
+        self._uart.write(b"AT+CIPCLOSE="+ str(sock_num).encode() + b",")
+        self._uart.write(str(sock_num).encode() + b"\r\n")
         self._read_line()
-        self._parse_reply(b"", idx=1)
-        if not "CLOSE OK" in self._buf:
+        if not self._parse_reply(b"CLOSE OK", idx=0):
             return False
         return True
 

examples/fona_cheerlights.py

@@ -0,0 +1,78 @@
+import time
+import board
+import busio
+import digitalio
+from adafruit_fona.adafruit_fona import FONA
+import adafruit_fona.adafruit_fona_socket as cellular_socket
+import adafruit_requests as requests
+
+import neopixel
+import adafruit_fancyled.adafruit_fancyled as fancy
+
+# Get GPRS details and more from a secrets.py file
+try:
+    from secrets import secrets
+except ImportError:
+    print("GPRS secrets are kept in secrets.py, please add them there!")
+    raise
+
+# Create a serial connection for the FONA connection using 4800 baud.
+# These are the defaults you should use for the FONA Shield.
+# For other boards set RX = GPS module TX, and TX = GPS module RX pins.
+uart = busio.UART(board.TX, board.RX, baudrate=4800)
+rst = digitalio.DigitalInOut(board.D4)
+
+# Initialize FONA module (this may take a few seconds)
+print("Initializing FONA")
+fona = FONA(uart, rst)
+
+# Enable GPS
+fona.gps = True
+
+# Bring up cellular connection
+fona.configure_gprs((secrets["apn"], secrets["apn_username"], secrets["apn_password"]))
+
+# Bring up GPRS
+fona.gprs = True
+print("FONA initialized")
+
+# Initialize a requests object with a socket and cellular interface
+requests.set_socket(cellular_socket, fona)
+
+DATA_SOURCE = "http://api.thingspeak.com/channels/1417/feeds.json?results=1"
+DATA_LOCATION = ["feeds", 0, "field2"]
+
+# neopixels
+pixels = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=0.3)
+pixels.fill(0)
+
+attempts = 3  # Number of attempts to retry each request
+failure_count = 0
+response = None
+
+# we'll save the value in question
+last_value = value = None
+
+while True:
+    print("Fetching json from", DATA_SOURCE)
+    response = requests.get(DATA_SOURCE)
+    print(response.json())
+    value = response.json()
+    for key in DATA_LOCATION:
+        value = value[key]
+        print(value)
+    response.close()
+
+    if not value:
+        continue
+    if last_value != value:
+        color = int(value[1:], 16)
+        red = color >> 16 & 0xFF
+        green = color >> 8 & 0xFF
+        blue = color & 0xFF
+        gamma_corrected = fancy.gamma_adjust(fancy.CRGB(red, green, blue)).pack()
+
+        pixels.fill(gamma_corrected)
+        last_value = value
+    response = None
+    time.sleep(60)

examples/fona_simpletest.py

@@ -44,7 +44,7 @@
     "IP lookup adafruit.com: %s" % fona.get_host_by_name("adafruit.com")
 )
 
-fona._debug = True
+# fona._debug = True
 print("Fetching text from", TEXT_URL)
 r = requests.get(TEXT_URL)
 print("-" * 40)