README.md

@@ -13,8 +13,6 @@ This project is for educational purposes only. It does not implement any
 authentication and/or encryption protocol, so it is not suitable for real
 production.
 
-![Application Schema](./docs/application_chart.png)
-
 ## Installation
 
 ### Requirements

arduino/tempLightSensor/tempLightSensor.ino

@@ -55,7 +55,7 @@ struct netConfig {
 } config;
 
 char serial[9];
-const String dpsURL = "/dps/device/subscribe/";
+const String apiURL = "/api/device/subscribe/";
 const String telemetryURL = "/telemetry/";
 
 void setup(void) {
@@ -63,7 +63,7 @@ void setup(void) {
 
   analogReference(EXTERNAL);
 
-  StaticJsonDocument<20> dps;
+  StaticJsonDocument<20> api;
 
   byte mac[6];
   int eeAddress = 0;
@@ -110,8 +110,8 @@ void setup(void) {
   Serial.println("DEBUG: clock updated via NTP.");
 #endif
 
-  dps["serial"] = serial;
-  postData(config, dpsURL, dps);
+  api["serial"] = serial;
+  postData(config, apiURL, api);
 
   telemetry["device"] = serial;
   // payload["id"] = serverName;

bite/api/admin.py

@@ -18,7 +18,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from django.contrib import admin
-from dps.models import Device, WhiteList
+from api.models import Device, WhiteList
 
 
 @admin.register(Device)

bite/api/apps.py

@@ -20,5 +20,5 @@
 from django.apps import AppConfig
 
 
-class DPSConfig(AppConfig):
-    name = 'dps'
+class ApiConfig(AppConfig):
+    name = 'api'

bite/api/migrations/0001_initial.py

@@ -1,6 +1,6 @@
 # Generated by Django 3.1.3 on 2021-03-19 08:08
 
-import dps.models
+import api.models
 from django.db import migrations, models
 import uuid
 
@@ -16,7 +16,7 @@ class Migration(migrations.Migration):
         migrations.CreateModel(
             name='Device',
             fields=[
-                ('serial', models.CharField(max_length=128, unique=True, validators=[dps.models.device_validation])),
+                ('serial', models.CharField(max_length=128, unique=True, validators=[api.models.device_validation])),
                 ('uuid', models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False)),
                 ('creation_time', models.DateTimeField(auto_now_add=True)),
                 ('updated_time', models.DateTimeField(auto_now=True)),

bite/api/serializers.py

@@ -18,7 +18,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from rest_framework import serializers
-from dps.models import Device, device_validation
+from api.models import Device, device_validation
 
 
 class DeviceSerializer(serializers.ModelSerializer):

bite/api/tests.py

@@ -18,10 +18,10 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from django.test import TestCase, Client
-from dps.models import Device, WhiteList
+from api.models import Device, WhiteList
 
 
-class DPSTestCase(TestCase):
+class ApiTestCase(TestCase):
     c = Client()
 
     def setUp(self):
@@ -29,17 +29,17 @@ class DPSTestCase(TestCase):
         Device.objects.create(serial='test1234')
 
     def test_no_whitelist(self):
-        response = self.c.post('/dps/device/provision/',
+        response = self.c.post('/api/device/subscribe/',
                                {'serial': 'test12345'})
         self.assertEqual(response.status_code, 400)
 
-    def test_provision_post(self):
+    def test_subscribe_post(self):
         WhiteList.objects.create(serial='test12345')
-        response = self.c.post('/dps/device/provision/',
+        response = self.c.post('/api/device/subscribe/',
                                {'serial': 'test12345'})
         self.assertEqual(response.status_code, 201)
 
-    def test_provision_get(self):
-        response = self.c.get('/dps/device/list/')
+    def test_subscribe_get(self):
+        response = self.c.get('/api/device/list/')
         self.assertEqual(
             response.json()[0]['serial'], 'test1234')

bite/api/urls.py

@@ -33,13 +33,13 @@ Including another URLconf
     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
 """
 from django.urls import path
-from dps.views import DPS
+from api.views import APISubscribe
 
 urlpatterns = [
-    path('device/provision/',
-         DPS.as_view({'post': 'create'}),
-         name='device-provision'),
+    path('device/subscribe/',
+         APISubscribe.as_view({'post': 'create'}),
+         name='device-subscribe'),
     path('device/list/',
-         DPS.as_view({'get': 'list'}),
+         APISubscribe.as_view({'get': 'list'}),
          name='device-list'),
 ]

bite/api/views.py

@@ -19,10 +19,10 @@
 
 from rest_framework.viewsets import ModelViewSet
 
-from dps.models import Device
-from dps.serializers import DeviceSerializer
+from api.models import Device
+from api.serializers import DeviceSerializer
 
 
-class DPS(ModelViewSet):
+class APISubscribe(ModelViewSet):
     queryset = Device.objects.all()
     serializer_class = DeviceSerializer

bite/bite/local_settings.py.sample

@@ -1,20 +0,0 @@
-DATABASES = {
-    'default': {
-        'ENGINE': 'django.db.backends.postgresql',
-        'NAME': 'bite',
-        'USER': 'bite',
-        'PASSWORD': 'password',
-        'HOST': 'localhost',
-        'PORT': '5432',
-    }
-}
-
-MQTT_BROKER = {
-    'HOST': 'localhost',
-    'PORT': '1883',
-}
-
-KAFKA_BROKER = {
-    'HOST': 'localhost',
-    'PORT': '29092',
-}

bite/bite/settings.py

@@ -61,7 +61,7 @@ INSTALLED_APPS = [
     # 'health_check.storage',
     'rest_framework',
     'bite',
-    'dps',
+    'api',
     'telemetry',
 ]
 
@@ -167,12 +167,11 @@ KAFKA_BROKER = {
     'PORT': '9092',
 }
 
-try:
-    from bite.local_settings import *
-except ImportError:
-    pass
-
+# If no local_settings.py is availble in the current folder let's try to
+# load it from the application root
 try:
     from bite.production import *
 except ImportError:
+    # If a local_setting.py does not exist
+    # settings in this file only will be used
     pass

bite/bite/urls.py

@@ -37,13 +37,13 @@ from django.contrib import admin
 from django.conf import settings
 from django.urls import include, path
 
-from dps import urls as dps_urls
+from api import urls as api_urls
 from telemetry import urls as telemetry_urls
 
 urlpatterns = [
     path('admin/', admin.site.urls),
     path('ht/', include('health_check.urls')),
-    path('dps/', include(dps_urls)),
+    path('api/', include(api_urls)),
     path('telemetry/', include(telemetry_urls)),
 ]
 

bite/telemetry/management/commands/dispatcher.py

@@ -31,16 +31,16 @@ from django.conf import settings
 from django.core.management.base import BaseCommand
 from django.core.exceptions import ObjectDoesNotExist
 
-from dps.models import Device
+from api.models import Device
 
 
 class Command(BaseCommand):
-    help = "Telemetry dispatcher"
+    help = 'MQTT to DB deamon'
 
-    MQTT_HOST = settings.MQTT_BROKER["HOST"]
-    MQTT_PORT = int(settings.MQTT_BROKER["PORT"])
-    KAFKA_HOST = settings.KAFKA_BROKER["HOST"]
-    KAFKA_PORT = int(settings.KAFKA_BROKER["PORT"])
+    MQTT_HOST = settings.MQTT_BROKER['HOST']
+    MQTT_PORT = int(settings.MQTT_BROKER['PORT'])
+    KAFKA_HOST = settings.KAFKA_BROKER['HOST']
+    KAFKA_PORT = int(settings.KAFKA_BROKER['PORT'])
     producer = None
 
     @sync_to_async
@@ -52,7 +52,10 @@ class Command(BaseCommand):
 
     @sync_to_async
     def dispatch(self, message):
-        self.producer.send("telemetry", {"transport": "mqtt", "body": message})
+        self.producer.send(
+            'telemetry', {"transport": 'mqtt',
+                          "body": message}
+        )
 
     async def mqtt_broker(self):
         async with Client(self.MQTT_HOST, port=self.MQTT_PORT) as client:
@@ -63,13 +66,12 @@ class Command(BaseCommand):
                     device = await self.get_device(message.topic)
                     if device is not None:
                         message_body = json.loads(
-                            message.payload.decode("utf-8")
-                        )
+                            message.payload.decode('utf-8'))
                         await self.dispatch(message_body)
                     else:
                         self.stdout.write(
-                            self.style.ERROR("DEBUG: message discarded")
-                        )
+                            self.style.ERROR(
+                                'DEBUG: message discarded'))
 
     def handle(self, *args, **options):
         client = mqtt.Client()
@@ -79,26 +81,24 @@ class Command(BaseCommand):
                 break
             except (socket.gaierror, ConnectionRefusedError):
                 self.stdout.write(
-                    self.style.WARNING("WARNING: MQTT broker not available")
-                )
+                    self.style.WARNING('WARNING: MQTT broker not available'))
                 time.sleep(5)
 
         while True:
             try:
                 self.producer = KafkaProducer(
-                    bootstrap_servers="{}:{}".format(
+                    bootstrap_servers='{}:{}'.format(
                         self.KAFKA_HOST, self.KAFKA_PORT
                     ),
-                    value_serializer=lambda v: json.dumps(v).encode("utf-8"),
-                    retries=5,
+                    value_serializer=lambda v: json.dumps(v).encode('utf-8'),
+                    retries=5
                 )
                 break
             except NoBrokersAvailable:
                 self.stdout.write(
-                    self.style.WARNING("WARNING: Kafka broker not available")
-                )
+                    self.style.WARNING('WARNING: Kafka broker not available'))
                 time.sleep(5)
 
-        self.stdout.write(self.style.SUCCESS("INFO: Brokers subscribed"))
+        self.stdout.write(self.style.SUCCESS('INFO: Brokers subscribed'))
         client.disconnect()
         asyncio.run(self.mqtt_broker())

bite/telemetry/management/commands/handler.py

@@ -26,15 +26,15 @@ from django.conf import settings
 from django.core.management.base import BaseCommand
 from django.core.exceptions import ObjectDoesNotExist
 
-from dps.models import Device
+from api.models import Device
 from telemetry.models import Telemetry
 
 
 class Command(BaseCommand):
-    help = "Telemetry handler"
+    help = 'MQTT to DB deamon'
 
-    KAFKA_HOST = settings.KAFKA_BROKER["HOST"]
-    KAFKA_PORT = int(settings.KAFKA_BROKER["PORT"])
+    KAFKA_HOST = settings.KAFKA_BROKER['HOST']
+    KAFKA_PORT = int(settings.KAFKA_BROKER['PORT'])
 
     def get_device(self, serial):
         try:
@@ -47,7 +47,7 @@ class Command(BaseCommand):
             transport=transport,
             device=self.get_device(message["device"]),
             clock=message["clock"],
-            payload=message["payload"],
+            payload=message["payload"]
         )
 
     def handle(self, *args, **options):
@@ -55,22 +55,22 @@ class Command(BaseCommand):
             try:
                 consumer = KafkaConsumer(
                     "telemetry",
-                    bootstrap_servers="{}:{}".format(
+                    bootstrap_servers='{}:{}'.format(
                         self.KAFKA_HOST, self.KAFKA_PORT
                     ),
                     group_id="handler",
-                    value_deserializer=lambda m: json.loads(m.decode("utf8")),
+                    value_deserializer=lambda m: json.loads(m.decode('utf8')),
                 )
                 break
             except NoBrokersAvailable:
                 self.stdout.write(
-                    self.style.WARNING("WARNING: Kafka broker not available")
-                )
+                    self.style.WARNING('WARNING: Kafka broker not available'))
                 time.sleep(5)
 
-        self.stdout.write(self.style.SUCCESS("INFO: Kafka broker subscribed"))
+        self.stdout.write(self.style.SUCCESS('INFO: Kafka broker subscribed'))
         for message in consumer:
             self.store_telemetry(
-                message.value["transport"], message.value["body"]
+                message.value["transport"],
+                message.value["body"]
             )
         consumer.unsuscribe()

bite/telemetry/migrations/0001_initial.py

@@ -11,7 +11,7 @@ class Migration(migrations.Migration):
     initial = True
 
     dependencies = [
-        ('dps', '0001_initial'),
+        ('api', '0001_initial'),
     ]
 
     operations = [
@@ -23,7 +23,7 @@ class Migration(migrations.Migration):
                 ('transport', models.CharField(choices=[('http', 'http'), ('mqtt', 'mqtt')], default='http', max_length=4)),
                 ('clock', models.IntegerField(null=True, validators=[django.core.validators.MinValueValidator(0)])),
                 ('payload', models.JSONField(validators=[telemetry.models.telemetry_validation])),
-                ('device', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='dps.device')),
+                ('device', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='api.device')),
             ],
             options={
                 'verbose_name_plural': 'Telemetry',

bite/telemetry/models.py

@@ -21,7 +21,7 @@ from django.db import models
 from django.core.validators import MinValueValidator
 from django.core.exceptions import ValidationError
 
-from dps.models import Device
+from api.models import Device
 
 
 def telemetry_validation(value):

bite/telemetry/serializers.py

@@ -18,7 +18,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from rest_framework import serializers
-from dps.models import Device
+from api.models import Device
 from telemetry.models import Telemetry
 
 

bite/telemetry/tests.py

@@ -19,7 +19,7 @@
 
 import json
 from django.test import TestCase, Client
-from dps.models import Device, WhiteList
+from api.models import Device, WhiteList
 
 
 class ApiTestCase(TestCase):

docker/docker-compose.dev.yml

@@ -37,11 +37,8 @@ services:
         - "${CUSTOM_DOCKER_IP:-0.0.0.0}:8000:8000"
 
   kafka:
-    environment:
-      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092,PLAINTEXT_HOST://localhost:29092
-      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
     ports:
-        - "${CUSTOM_DOCKER_IP:-0.0.0.0}:29092:29092"
+        - "${CUSTOM_DOCKER_IP:-0.0.0.0}:9092:9092"
 
   data-migration:
     volumes:

docker/docker-compose.yml

@@ -43,7 +43,7 @@ services:
 
   timescale:
     <<: *service_default
-    image: timescale/timescaledb:latest-pg15
+    image: timescale/timescaledb:latest-pg12
     environment:
       POSTGRES_USER: "bite"
       POSTGRES_PASSWORD: "password"
@@ -69,6 +69,8 @@ services:
     environment:
       ZOOKEEPER_CLIENT_PORT: 2181
       ZOOKEEPER_TICK_TIME: 2000
+    ports:
+      - 22181:2181
 
   kafka:
     image: confluentinc/cp-kafka:latest
@@ -79,8 +81,8 @@ services:
     environment:
       KAFKA_BROKER_ID: 1
       KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
-      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092
-      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT
+      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092,PLAINTEXT_HOST://localhost:29092
+      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
       KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
       KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
 
@@ -97,6 +99,7 @@ services:
       - staticdata:/srv/appdata/bite/static
       - ./ingress/nginx.conf:/etc/nginx/nginx.conf
 
+
   bite:
     <<: *service_default
     build:

docker/simulator/device_simulator.py

@@ -29,7 +29,7 @@ import argparse
 from time import sleep
 import paho.mqtt.publish as publish
 
-DEBUG = bool(os.environ.get("IOT_DEBUG", False))
+DEBUG = bool(os.environ.get('IOT_DEBUG', False))
 http = urllib3.PoolManager()
 
 
@@ -39,16 +39,15 @@ def post_json(endpoint, url, data):
     if DEBUG:
         print(json_data)
 
-    encoded_data = json_data.encode("utf8")
+    encoded_data = json_data.encode('utf8')
 
     while True:
         try:
             r = http.request(
-                "POST",
+                'POST',
                 endpoint + url,
                 body=encoded_data,
-                headers={"content-type": "application/json"},
-            )
+                headers={'content-type': 'application/json'})
             return r
         except urllib3.exceptions.MaxRetryError:
             pass
@@ -58,89 +57,74 @@ def post_json(endpoint, url, data):
 
 def publish_json(transport, endpoint, data):
     json_data = json.dumps(data)
-    serial = data["device"]
+    serial = data['device']
 
     if DEBUG:
         print(json_data)
 
-    encoded_data = json_data.encode("utf8")
+    encoded_data = json_data.encode('utf8')
 
     publish.single(
         topic=serial,
         payload=encoded_data,
-        hostname=endpoint.split(":")[0],
-        port=int(endpoint.split(":")[1]),
+        hostname=endpoint.split(':')[0],
+        port=int(endpoint.split(':')[1]),
         client_id=serial,
-        transport=("websockets" if transport == "ws" else "tcp"),
+        transport=('websockets' if transport == 'ws' else 'tcp'),
         # auth=auth FIXME
     )
 
 
 def main():
-    parser = argparse.ArgumentParser(description="IoT simulator oprions")
+    parser = argparse.ArgumentParser(
+        description='IoT simulator oprions')
 
-    parser.add_argument(
-        "-e",
-        "--endpoint",
-        default=os.environ.get("IOT_HTTP", "http://127.0.0.1:8000"),
-        help="IoT HTTP endpoint",
-    )
-    parser.add_argument(
-        "-m",
-        "--mqtt",
-        default=os.environ.get("IOT_MQTT", "127.0.0.1:1883"),
-        help="IoT MQTT endpoint",
-    )
-    parser.add_argument(
-        "-t",
-        "--transport",
-        choices=["mqtt", "ws", "http"],
-        default=os.environ.get("IOT_TL", "http"),
-        help="IoT transport layer",
-    )
-    parser.add_argument(
-        "-s",
-        "--serial",
-        default=os.environ.get("IOT_SERIAL"),
-        help="IoT device serial number",
-    )
-    parser.add_argument(
-        "-d",
-        "--delay",
-        metavar="s",
-        type=float,
-        default=os.environ.get("IOT_DELAY", 10),
-        help="Delay between requests",
-    )
+    parser.add_argument('-e', '--endpoint',
+                        default=os.environ.get('IOT_HTTP',
+                                               'http://127.0.0.1:8000'),
+                        help='IoT HTTP endpoint')
+    parser.add_argument('-m', '--mqtt',
+                        default=os.environ.get('IOT_MQTT',
+                                               '127.0.0.1:1883'),
+                        help='IoT MQTT endpoint')
+    parser.add_argument('-t', '--transport',
+                        choices=['mqtt', 'ws', 'http'],
+                        default=os.environ.get('IOT_TL', 'http'),
+                        help='IoT transport layer')
+    parser.add_argument('-s', '--serial',
+                        default=os.environ.get('IOT_SERIAL'),
+                        help='IoT device serial number')
+    parser.add_argument('-d', '--delay', metavar='s', type=float,
+                        default=os.environ.get('IOT_DELAY', 10),
+                        help='Delay between requests')
     args = parser.parse_args()
 
-    dps = "/dps/device/provision/"
-    telemetry = "/telemetry/"
+    subscribe = '/api/device/subscribe/'
+    telemetry = '/telemetry/'
 
     if args.serial is None:
-        args.serial = "".join(
-            random.choices(string.ascii_lowercase + string.digits, k=8)
-        )
+        args.serial = ''.join(
+            random.choices(string.ascii_lowercase + string.digits, k=8))
 
-    data = {"serial": args.serial}
-    post_json(args.endpoint, dps, data)
+    data = {'serial': args.serial}
+    post_json(args.endpoint, subscribe, data)
 
     while True:
         data = {
-            "device": args.serial,
-            "clock": int(datetime.datetime.now().timestamp()),
+            'device': args.serial,
+            'clock': int(datetime.datetime.now().timestamp()),
         }
         payload = {
-            "id": "device_simulator",
-            "light": random.randint(300, 500),
-            "temperature": {"celsius": round(random.uniform(20, 28), 1)},
+            'id': 'device_simulator',
+            'light': random.randint(300, 500),
+            'temperature': {
+                'celsius': round(random.uniform(20, 28), 1)}
         }
-        if args.transport == "http":
-            post_json(args.endpoint, telemetry, {**data, "payload": payload})
-        elif args.transport in ("mqtt", "ws"):
+        if args.transport == 'http':
+            post_json(args.endpoint, telemetry, {**data, 'payload': payload})
+        elif args.transport in ('mqtt', 'ws'):
             publish_json(
-                args.transport, args.mqtt, {**data, "payload": payload}
-            )
+                args.transport, args.mqtt, {**data, 'payload': payload})
         else:
             raise NotImplementedError
         sleep(args.delay)

esp32/rssiHall/rssiHall.ino

@@ -55,13 +55,13 @@ struct netConfig {
 } config;
 
 char* serial;
-const String dpsURL = "/dps/device/subscribe/";
+const String apiURL = "/api/device/subscribe/";
 const String telemetryURL = "/telemetry/";
 
 void setup(void) {
   Serial.begin(115200);
 
-  StaticJsonDocument<64> dps;
+  StaticJsonDocument<64> api;
 
   preferences.begin("iot");
   // Get the serial number from flash
@@ -117,8 +117,8 @@ void setup(void) {
   Serial.println("DEBUG: clock updated via NTP.");
 #endif
 
-  dps["serial"] = serial;
-  postData(config, dpsURL, dps);
+  api["serial"] = serial;
+  postData(config, apiURL, api);
 
   telemetry["device"] = serial;
   // payload["id"] = serverName;