Osamu Koizumi
HelloMQTT over TLS.
Fork of
HelloMQTT
by 
Osamu Koizumi
HelloMQTT over TLS
This program is a fork of HelloMQTT. Added TLS capability by using TLSSocket library. Tested on K64F.
This sample program connects to iot.eclipse.org:8883 by default. Verifies server identification. Subscribes a certain topic. Then publishes three messages with different QoSs, i.e. QoS0, QoS1, and QoS2.
Warning
Some brokers do not accept QoS2 and/or QoS1 message. For example, AWS IoT Message Broker doesn't accept QoS2. In such broker, this program doesn't work as is. Change QoS level.
Output from console
HelloMQTT: version is 0.70 Opening network interface... Network interface opened successfully. Connecting to host iot.eclipse.org:8883 ... Connection established. MQTT client is trying to connect the server ... Client connected. Client is trying to subscribe a topic "mbed-test". Client has subscribed a topic "mbed-test". Client publishes messages ... Publishing message QoS 0. QoS 0 message published. ! Message arrived: qos 0, retained 0, dup 0, packetid 6257 ! Payload Hello World! QoS 0 message from app version 0.700000 Publishing message QoS 1. QoS 1 message published. ! Message arrived: qos 1, retained 0, dup 0, packetid 1 ! Payload Hello World! QoS 1 message from app version 0.700000 Publishing message QoS 2. QoS 2 message published. ! Message arrived: qos 2, retained 0, dup 0, packetid 2 ! Payload Hello World! QoS 2 message from app version 0.700000 Version 0.70: finish 3 msgs
Known Issues
On K64F, when serial baud rate is changed from 9600 to 115200, program fails.
Diff: MQTTNetwork.h
- Revision:
- 20:49c9daf2b0ff
- Child:
- 21:a68bd76740f9
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/MQTTNetwork.h Tue Jan 10 18:10:17 2017 -0600
@@ -0,0 +1,38 @@
+#ifndef _MQTTNETWORK_H_
+#define _MQTTNETWORK_H_
+
+#include "NetworkInterface.h"
+
+class MQTTNetwork {
+public:
+ MQTTNetwork(NetworkInterface* aNetwork) : network(aNetwork) {
+ socket = new TCPSocket();
+ }
+
+ ~MQTTNetwork() {
+ delete socket;
+ }
+
+ int read(unsigned char* buffer, int len, int timeout) {
+ return socket->recv(buffer, len);
+ }
+
+ int write(unsigned char* buffer, int len, int timeout) {
+ return socket->send(buffer, len);
+ }
+
+ int connect(const char* hostname, int port) {
+ socket->open(network);
+ return socket->connect(hostname, port);
+ }
+
+ void disconnect() {
+
+ }
+
+private:
+ NetworkInterface* network;
+ TCPSocket* socket;
+};
+
+#endif // _MQTTNETWORK_H_