From f54375fa0958c3a79baf1444ee00161a7e6e0d6c Mon Sep 17 00:00:00 2001
From: Trygve Laugstøl <trygvis@inamo.no>
Date: Wed, 13 Jun 2018 23:46:46 +0200
Subject: wip

---
 slides/TODO.md                      |  16 ++++++++++++++++
 slides/connected-arduino-slides.pdf | Bin 293025 -> 293791 bytes
 slides/connected-arduino-text.pdf   | Bin 64793 -> 298798 bytes
 slides/connected-arduino.md         |  37 +++++++++++++++++++++++++++++++++---
 slides/toc.md                       |   7 ++++---
 5 files changed, 54 insertions(+), 6 deletions(-)

(limited to 'slides')

diff --git a/slides/TODO.md b/slides/TODO.md
index 7d053b9..5b84672 100644
--- a/slides/TODO.md
+++ b/slides/TODO.md
@@ -4,4 +4,20 @@ Slide: *Device and application architecture with MQTT*
   Illustrates that everyone connects to the broker, but messages can
   be pushed. Contrast to HTTP.
 
+Slide: *MQTT on Arduino*
+* flytt callback til egen slide.
+* legg til Serial.println("connecting"); og Serial.println("connected");
+* sett mqtt_server = "trygvis.io";
+ditto på neste slide
+
+* vis client_id
+
 * Assignments: D0 is the pin to use.
+
+
+MQTT
+* fix switch orientation
+* husk å gjøre preparations
+* screen shot av library manager og installering av PubSubClient
+
+* vis hvordan man formaterer stringer., clientId og subscription patterns.
diff --git a/slides/connected-arduino-slides.pdf b/slides/connected-arduino-slides.pdf
index 83e8750..cc258eb 100644
Binary files a/slides/connected-arduino-slides.pdf and b/slides/connected-arduino-slides.pdf differ
diff --git a/slides/connected-arduino-text.pdf b/slides/connected-arduino-text.pdf
index e5088b9..6882209 100644
Binary files a/slides/connected-arduino-text.pdf and b/slides/connected-arduino-text.pdf differ
diff --git a/slides/connected-arduino.md b/slides/connected-arduino.md
index 79ba123..16f93d4 100644
--- a/slides/connected-arduino.md
+++ b/slides/connected-arduino.md
@@ -126,6 +126,27 @@ class {
 ESP.restart();
 ~~~
 
+## ESP
+
+~~~c++
+// Top of file
+#include <ESP8266WiFi.h>
+
+// In setup()
+WiFi.mode(WIFI_STA);
+WiFi.begin(ssid, password);
+
+while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+}
+
+Serial.println("");
+Serial.println("WiFi connected");
+Serial.println("IP address: ");
+Serial.println(WiFi.localIP());
+~~~
+
 ## ESP Arduino APIs
 
 ~~~c++
@@ -447,6 +468,8 @@ Broker
 PubSubClient is our MQTT client implementation.
 
 ~~~c++
+#include <PubSubClient.h>
+
 WiFiClient wifiClient;
 PubSubClient mqtt(wifiClient);
 
@@ -465,16 +488,24 @@ void setup() {
 
 ~~~c++
 void loop() {
-    if (!mqtt.connected())
+    if (!mqtt.connected()) {
         reconnect();
-    else
+    }
+    else {
         mqtt.loop();
+    }
+
     // Do work
 }
 
 void reconnect() {
-    while (!mqtt.connect(client_id));
+    do {
+        Serial.println("Connecting to MQTT");
+        delay(1000);
+    } while (!mqtt.connect(client_id));
+    Serial.println("Connected to MQTT server");
 
+    // Subscribe to any topics you need
     mqtt.subscribe(topic_pattern);
 }
 ~~~
diff --git a/slides/toc.md b/slides/toc.md
index 6e54e03..227f00a 100644
--- a/slides/toc.md
+++ b/slides/toc.md
@@ -8,6 +8,8 @@
     * Arduino file structure
     * Generic Arduino APIs
     * ESP Arduino APIs
+    * ESP
+#include <ESP8266WiFi.h>
     * ESP Arduino APIs
 * What is IoT
     * What is IoT
@@ -19,16 +21,15 @@
 * Lecture: MQTT
     * MQTT
     * Device and application architecture with MQTT
+    * MQTT Topic
     * MQTT - Implementations
     * MQTT Cloud Connectors
     * MQTT - The protocol
-    * MQTT - The protocol - MQTT Packet
-    * MQTT Connect
     * MQTT - The protocol - MQTT Topic
     * MQTT - The protocol - Retained message
     * MQTT - The protocol - Will message
-    * MQTT Topic
     * MQTT on Arduino
+#include <PubSubClient.h>
     * MQTT on Arduino
     * Assignment
     * MQTT topic architecture
-- 
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