Merge pull request #2234 from adafruit/telegraph

Adding code for two way telegraph guide

Two_Way_Servo_Telegraph/code.py

@@ -0,0 +1,133 @@
+# SPDX-FileCopyrightText: 2022 Liz Clark for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+import time
+import ssl
+import board
+import touchio
+import pwmio
+from analogio import AnalogIn
+import adafruit_requests
+import socketpool
+import wifi
+from adafruit_io.adafruit_io import IO_HTTP, AdafruitIO_RequestError
+from simpleio import map_range
+from adafruit_motor import servo
+
+#  select which display is running the code
+servo_one = True
+#  servo_two = True
+
+try:
+    from secrets import secrets
+except ImportError:
+    print("WiFi secrets are kept in secrets.py, please add them there!")
+    raise
+#  connect to adafruitio
+aio_username = secrets["aio_username"]
+aio_key = secrets["aio_key"]
+
+print("Connecting to %s" % secrets["ssid"])
+wifi.radio.connect(secrets["ssid"], secrets["password"])
+print("Connected to %s!" % secrets["ssid"])
+
+pool = socketpool.SocketPool(wifi.radio)
+requests = adafruit_requests.Session(pool, ssl.create_default_context())
+# Initialize an Adafruit IO HTTP API object
+io = IO_HTTP(aio_username, aio_key, requests)
+
+#  pylint: disable=undefined-variable
+#  disabling undefined-variable for ease of comment/uncomment
+#  servo_one or servo_two at top for user
+
+#  setup for display 1
+if servo_one:
+    #  servo calibration values
+    CALIB_MIN = 15708
+    CALIB_MAX = 43968
+    #  create feeds
+    try:
+        # get feed
+        out_feed = io.get_feed("touch-1")
+        in_feed = io.get_feed("touch-2")
+    except AdafruitIO_RequestError:
+        # if no feed exists, create one
+        out_feed = io.create_new_feed("touch-1")
+        in_feed = io.create_new_feed("touch-2")
+#  setup for display 2
+if servo_two:
+    CALIB_MIN = 15668
+    CALIB_MAX = 43550
+    try:
+        # get feed
+        out_feed = io.get_feed("touch-2")
+        in_feed = io.get_feed("touch-1")
+    except AdafruitIO_RequestError:
+        # if no feed exists, create one
+        out_feed = io.create_new_feed("touch-2")
+        in_feed = io.create_new_feed("touch-1")
+
+received_data = io.receive_data(in_feed["key"])
+
+# Pin setup
+SERVO_PIN = board.A1
+FEEDBACK_PIN = board.A2
+touch = touchio.TouchIn(board.TX)
+
+#  angles for servo
+ANGLE_MIN = 0
+ANGLE_MAX = 180
+
+# servo setup
+pwm = pwmio.PWMOut(SERVO_PIN, duty_cycle=2 ** 15, frequency=50)
+servo = servo.Servo(pwm)
+servo.angle = None
+
+# setup feedback
+feedback = AnalogIn(FEEDBACK_PIN)
+
+#  position finder function for servo
+def get_position():
+    return map_range(feedback.value, CALIB_MIN, CALIB_MAX, ANGLE_MIN, ANGLE_MAX)
+
+#  touch debounce
+touch_state = False
+#  new_msg value
+new_msg = None
+#  last_msg value
+last_msg = None
+#  time.monotonic() holder for pinging IO
+clock = 5
+
+while True:
+    #  check IO for new data every 5 seconds
+    if (time.monotonic() - clock) > 2:
+        #  get data
+        received_data = io.receive_data(in_feed["key"])
+        #  reset clock
+        clock = time.monotonic()
+    #  if touched...
+    if touch.value and touch_state is False:
+        touch_state = True
+    #  when touch is released...
+    if not touch.value and touch_state is True:
+        #  get position of servo
+        pos = get_position()
+        #  send position to IO
+        io.send_data(out_feed["key"], float(pos))
+        #  delay to settle
+        time.sleep(1)
+        #  reset touch state
+        touch_state = False
+    #  if a new value is detected
+    if float(received_data["value"]) != last_msg:
+        #  assign value to new_msg
+        new_msg = float(received_data["value"])
+        #  set servo angle
+        servo.angle = new_msg
+        #  quick delay to settle
+        time.sleep(1)
+        #  release servo
+        servo.angle = None
+        #  log msg
+        last_msg = new_msg