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Dependencies: EthernetInterface MQTTS NTPClient SDFileSystem mbed-rtos mbed wolfSSL
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MQTT is light weight protocol for M2M, IoT. MQTTS adds TLS(SSL) security layer under the MQTT. This program shows simple usage example of MQTTS library.
Connect information has to be stored in SD file "connectInfo.txt", with following lines in it.
- Host Name
- User Name
- Password
- Client ID
- Topic
The program asks following information on the terminal
- Port Number to be connected. If the port is >8000 it assumes MQTTS.
- Message to be published
- Certificate file name, if MQTTS. Input file name on SD card. Simply Return key force it to no server verification. The program set up the realtime clock by NTP for certificate verification.
This program has been tested on QoS 0 and 1, not 2.
This program was tested with FRDM-K64F, against Sango MQTT server by Shigredo. https://sango.shiguredo.jp/
Please refer original work of MQTT, here. https://developer.mbed.org/teams/mqtt.