Update code for PyPortal IoT Plant Monitor

.gitignore

@@ -4,3 +4,4 @@ Hue_Controller/secrets.h
 *.DS_Store
 CircuitPython_Logger/secrets\.py
 .python-version
+__pycache__

.pylintrc

@@ -52,7 +52,7 @@ confidence=
 # no Warning level messages displayed, use"--disable=all --enable=classes
 # --disable=W"
 # disable=import-error,print-statement,parameter-unpacking,unpacking-in-except,old-raise-syntax,backtick,long-suffix,old-ne-operator,old-octal-literal,import-star-module-level,raw-checker-failed,bad-inline-option,locally-disabled,locally-enabled,file-ignored,suppressed-message,useless-suppression,deprecated-pragma,apply-builtin,basestring-builtin,buffer-builtin,cmp-builtin,coerce-builtin,execfile-builtin,file-builtin,long-builtin,raw_input-builtin,reduce-builtin,standarderror-builtin,unicode-builtin,xrange-builtin,coerce-method,delslice-method,getslice-method,setslice-method,no-absolute-import,old-division,dict-iter-method,dict-view-method,next-method-called,metaclass-assignment,indexing-exception,raising-string,reload-builtin,oct-method,hex-method,nonzero-method,cmp-method,input-builtin,round-builtin,intern-builtin,unichr-builtin,map-builtin-not-iterating,zip-builtin-not-iterating,range-builtin-not-iterating,filter-builtin-not-iterating,using-cmp-argument,eq-without-hash,div-method,idiv-method,rdiv-method,exception-message-attribute,invalid-str-codec,sys-max-int,bad-python3-import,deprecated-string-function,deprecated-str-translate-call
-disable=too-many-instance-attributes,len-as-condition,too-few-public-methods,anomalous-backslash-in-string,no-else-return,simplifiable-if-statement,too-many-arguments,duplicate-code,no-name-in-module,no-member,print-statement,parameter-unpacking,unpacking-in-except,old-raise-syntax,backtick,long-suffix,old-ne-operator,old-octal-literal,import-star-module-level,raw-checker-failed,bad-inline-option,locally-disabled,locally-enabled,file-ignored,suppressed-message,useless-suppression,deprecated-pragma,apply-builtin,basestring-builtin,buffer-builtin,cmp-builtin,coerce-builtin,execfile-builtin,file-builtin,long-builtin,raw_input-builtin,reduce-builtin,standarderror-builtin,unicode-builtin,xrange-builtin,coerce-method,delslice-method,getslice-method,setslice-method,no-absolute-import,old-division,dict-iter-method,dict-view-method,next-method-called,metaclass-assignment,indexing-exception,raising-string,reload-builtin,oct-method,hex-method,nonzero-method,cmp-method,input-builtin,round-builtin,intern-builtin,unichr-builtin,map-builtin-not-iterating,zip-builtin-not-iterating,range-builtin-not-iterating,filter-builtin-not-iterating,using-cmp-argument,eq-without-hash,div-method,idiv-method,rdiv-method,exception-message-attribute,invalid-str-codec,sys-max-int,bad-python3-import,deprecated-string-function,deprecated-str-translate-call,import-error,missing-docstring,invalid-name,bad-whitespace,consider-using-enumerate
+disable=too-many-instance-attributes,len-as-condition,too-few-public-methods,anomalous-backslash-in-string,no-else-return,simplifiable-if-statement,too-many-arguments,duplicate-code,no-name-in-module,no-member,print-statement,parameter-unpacking,unpacking-in-except,old-raise-syntax,backtick,long-suffix,old-ne-operator,old-octal-literal,import-star-module-level,raw-checker-failed,bad-inline-option,locally-disabled,locally-enabled,file-ignored,suppressed-message,useless-suppression,deprecated-pragma,apply-builtin,basestring-builtin,buffer-builtin,cmp-builtin,coerce-builtin,execfile-builtin,file-builtin,long-builtin,raw_input-builtin,reduce-builtin,standarderror-builtin,unicode-builtin,xrange-builtin,coerce-method,delslice-method,getslice-method,setslice-method,no-absolute-import,old-division,dict-iter-method,dict-view-method,next-method-called,metaclass-assignment,indexing-exception,raising-string,reload-builtin,oct-method,hex-method,nonzero-method,cmp-method,input-builtin,round-builtin,intern-builtin,unichr-builtin,map-builtin-not-iterating,zip-builtin-not-iterating,range-builtin-not-iterating,filter-builtin-not-iterating,using-cmp-argument,eq-without-hash,div-method,idiv-method,rdiv-method,exception-message-attribute,invalid-str-codec,sys-max-int,bad-python3-import,deprecated-string-function,deprecated-str-translate-call,import-error,missing-docstring,invalid-name,bad-whitespace,consider-using-enumerate,unexpected-keyword-arg
 
 # Enable the message, report, category or checker with the given id(s). You can
 # either give multiple identifier separated by comma (,) or put this option

PyPortal_Azure_Plant_Monitor/azure_gfx_helper.py

@@ -13,7 +13,7 @@
 data_font = cwd+"/fonts/Collegiate-50.bdf"
 
 class Azure_GFX(displayio.Group):
-    def __init__(self, is_celsius=True):
+    def __init__(self, is_celsius):
         """Creates an Azure_GFX object.
         :param bool is_celsius: Temperature displayed in Celsius.
         """
@@ -76,9 +76,9 @@ def __init__(self, is_celsius=True):
         self.azure_status_text.y = 225
         self._text_group.append(self.azure_status_text)
 
+    def show_text(self):
         board.DISPLAY.show(self._text_group)
 
-
     def display_azure_status(self, status_text):
         """Displays the system status on the PyPortal
         :param str status_text: Description of Azure IoT status

PyPortal_Azure_Plant_Monitor/code.py

@@ -1,23 +1,30 @@
 """
 PyPortal Azure IoT Plant Monitor
 ====================================================
-Log plant vitals to Microsoft Azure IoT with
+Log plant vitals to Microsoft Azure IoT Central with
 your PyPortal
 
-Author: Brent Rubell for Adafruit Industries, 2019
+Authors: Brent Rubell for Adafruit Industries, 2019
+       : Jim Bennett for Microsoft, 2020
 """
 import time
+import json
 import board
 import busio
 from digitalio import DigitalInOut
 from adafruit_esp32spi import adafruit_esp32spi, adafruit_esp32spi_wifimanager
+import adafruit_esp32spi.adafruit_esp32spi_socket as socket
 import neopixel
-from adafruit_azureiot import IOT_Hub
+from adafruit_ntp import NTP
+from adafruit_azureiot import IoTCentralDevice
 from adafruit_seesaw.seesaw import Seesaw
 
 # gfx helper
 import azure_gfx_helper
 
+# init. graphics helper
+gfx = azure_gfx_helper.Azure_GFX(is_celsius=True)
+
 # Get wifi details and more from a secrets.py file
 try:
     from secrets import secrets
@@ -31,18 +38,39 @@
 esp32_reset = DigitalInOut(board.ESP_RESET)
 spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
 esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)
+
+# Set up the WiFi manager with a status light to show the WiFi connection status
 status_light = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=0.2)
 wifi = adafruit_esp32spi_wifimanager.ESPSPI_WiFiManager(esp, secrets, status_light)
+print("WiFi connecting...")
+wifi.connect()
+print("WiFi connected!")
+
+# Time setup, needed to authenticate with Azure IoT Central
+ntp = NTP(esp)
+while not ntp.valid_time:
+    print("Failed to obtain time, retrying in 5 seconds...")
+    time.sleep(5)
+    ntp.set_time()
 
 # Soil Sensor Setup
 i2c_bus = busio.I2C(board.SCL, board.SDA)
 ss = Seesaw(i2c_bus, addr=0x36)
 
-# Create an instance of the Azure IoT Hub
-hub = IOT_Hub(wifi, secrets['azure_iot_hub'], secrets['azure_iot_sas'], secrets['azure_device_id'])
+# Create an instance of the Azure IoT Central device
+device = IoTCentralDevice(
+    socket,
+    esp,
+    secrets["id_scope"],
+    secrets["device_id"],
+    secrets["key"]
+)
 
-# init. graphics helper
-gfx = azure_gfx_helper.Azure_GFX(False)
+# Connect to Azure IoT Central
+device.connect()
+
+# Hide the splash screen and show the telemetry values
+gfx.show_text()
 
 while True:
     try:
@@ -52,15 +80,27 @@
         temperature = ss.get_temp()
         # display soil sensor values on pyportal
         gfx.display_moisture(moisture_level)
-        temperature = gfx.display_temp(temperature)
+        gfx.display_temp(temperature)
+
         print('Sending data to Azure')
         gfx.display_azure_status('Sending data...')
-        hub.send_device_message(temperature)
-        hub.send_device_message(moisture_level)
+
+        # send the temperature and moisture level to Azure
+        message = {
+            "Temperature": temperature,
+            "MoistureLevel": moisture_level
+        }
+        device.send_telemetry(json.dumps(message))
+        device.loop()
+
         gfx.display_azure_status('Data sent!')
         print('Data sent!')
     except (ValueError, RuntimeError) as e:
         print("Failed to get data, retrying\n", e)
         wifi.reset()
+        wifi.connect()
+        device.reconnect()
         continue
-    time.sleep(60)
+
+    # Sleep for 10 minutes before getting the next value
+    time.sleep(600)