HelloMQTT over TLS.
Fork of HelloMQTT by
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.
MQTTNetwork.h@20:49c9daf2b0ff, 2017-01-10 (annotated)
- Committer:
- Jan Jongboom
- Date:
- Tue Jan 10 18:10:17 2017 -0600
- Revision:
- 20:49c9daf2b0ff
- Child:
- 21:a68bd76740f9
Update to mbed OS 5, use NetworkInterface for multiple connectivity methods - not just ethernet
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Jan Jongboom |
20:49c9daf2b0ff | 1 | #ifndef _MQTTNETWORK_H_ |
Jan Jongboom |
20:49c9daf2b0ff | 2 | #define _MQTTNETWORK_H_ |
Jan Jongboom |
20:49c9daf2b0ff | 3 | |
Jan Jongboom |
20:49c9daf2b0ff | 4 | #include "NetworkInterface.h" |
Jan Jongboom |
20:49c9daf2b0ff | 5 | |
Jan Jongboom |
20:49c9daf2b0ff | 6 | class MQTTNetwork { |
Jan Jongboom |
20:49c9daf2b0ff | 7 | public: |
Jan Jongboom |
20:49c9daf2b0ff | 8 | MQTTNetwork(NetworkInterface* aNetwork) : network(aNetwork) { |
Jan Jongboom |
20:49c9daf2b0ff | 9 | socket = new TCPSocket(); |
Jan Jongboom |
20:49c9daf2b0ff | 10 | } |
Jan Jongboom |
20:49c9daf2b0ff | 11 | |
Jan Jongboom |
20:49c9daf2b0ff | 12 | ~MQTTNetwork() { |
Jan Jongboom |
20:49c9daf2b0ff | 13 | delete socket; |
Jan Jongboom |
20:49c9daf2b0ff | 14 | } |
Jan Jongboom |
20:49c9daf2b0ff | 15 | |
Jan Jongboom |
20:49c9daf2b0ff | 16 | int read(unsigned char* buffer, int len, int timeout) { |
Jan Jongboom |
20:49c9daf2b0ff | 17 | return socket->recv(buffer, len); |
Jan Jongboom |
20:49c9daf2b0ff | 18 | } |
Jan Jongboom |
20:49c9daf2b0ff | 19 | |
Jan Jongboom |
20:49c9daf2b0ff | 20 | int write(unsigned char* buffer, int len, int timeout) { |
Jan Jongboom |
20:49c9daf2b0ff | 21 | return socket->send(buffer, len); |
Jan Jongboom |
20:49c9daf2b0ff | 22 | } |
Jan Jongboom |
20:49c9daf2b0ff | 23 | |
Jan Jongboom |
20:49c9daf2b0ff | 24 | int connect(const char* hostname, int port) { |
Jan Jongboom |
20:49c9daf2b0ff | 25 | socket->open(network); |
Jan Jongboom |
20:49c9daf2b0ff | 26 | return socket->connect(hostname, port); |
Jan Jongboom |
20:49c9daf2b0ff | 27 | } |
Jan Jongboom |
20:49c9daf2b0ff | 28 | |
Jan Jongboom |
20:49c9daf2b0ff | 29 | void disconnect() { |
Jan Jongboom |
20:49c9daf2b0ff | 30 | |
Jan Jongboom |
20:49c9daf2b0ff | 31 | } |
Jan Jongboom |
20:49c9daf2b0ff | 32 | |
Jan Jongboom |
20:49c9daf2b0ff | 33 | private: |
Jan Jongboom |
20:49c9daf2b0ff | 34 | NetworkInterface* network; |
Jan Jongboom |
20:49c9daf2b0ff | 35 | TCPSocket* socket; |
Jan Jongboom |
20:49c9daf2b0ff | 36 | }; |
Jan Jongboom |
20:49c9daf2b0ff | 37 | |
Jan Jongboom |
20:49c9daf2b0ff | 38 | #endif // _MQTTNETWORK_H_ |