68 lines
2.3 KiB
Markdown
68 lines
2.3 KiB
Markdown
|
# ESP-MQTT SSL Sample application
|
||
|
|
|
||
|
|
(See the README.md file in the upper level 'examples' directory for more information about examples.)
|
||
|
|
|
||
|
|
This example connects to the broker iot.eclipse.org using ssl transport and as a demonstration subscribes/unsubscribes and send a message on certain topic.
|
||
|
|
|
||
|
|
It uses ESP-MQTT library which implements mqtt client to connect to mqtt broker.
|
||
|
|
|
||
|
|
## How to use example
|
||
|
|
|
||
|
|
### Hardware Required
|
||
|
|
|
||
|
|
This example can be executed on any ESP32 board, the only required interface is WiFi and connection to internet.
|
||
|
|
|
||
|
|
### Configure the project
|
||
|
|
|
||
|
|
```
|
||
|
|
make menuconfig
|
||
|
|
```
|
||
|
|
|
||
|
|
* Set serial port under Serial Flasher Options.
|
||
|
|
|
||
|
|
* Set ssid and password for the board to connect to AP.
|
||
|
|
|
||
|
|
Note how to create a PEM certificate for iot.eclipse.org:
|
||
|
|
```
|
||
|
|
openssl s_client -showcerts -connect iot.eclipse.org:8883 </dev/null 2>/dev/null|openssl x509 -outform PEM >iot_eclipse_org.pem
|
||
|
|
```
|
||
|
|
|
||
|
|
### Build and Flash
|
||
|
|
|
||
|
|
Build the project and flash it to the board, then run monitor tool to view serial output:
|
||
|
|
|
||
|
|
```
|
||
|
|
make -j4 flash monitor
|
||
|
|
```
|
||
|
|
|
||
|
|
(To exit the serial monitor, type ``Ctrl-]``.)
|
||
|
|
|
||
|
|
See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
|
||
|
|
|
||
|
|
## Example Output
|
||
|
|
|
||
|
|
```
|
||
|
|
I (3714) event: sta ip: 192.168.0.139, mask: 255.255.255.0, gw: 192.168.0.2
|
||
|
|
I (3714) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
|
||
|
|
I (3964) MQTT_CLIENT: Sending MQTT CONNECT message, type: 1, id: 0000
|
||
|
|
I (4164) MQTTS_EXAMPLE: MQTT_EVENT_CONNECTED
|
||
|
|
I (4174) MQTTS_EXAMPLE: sent publish successful, msg_id=41464
|
||
|
|
I (4174) MQTTS_EXAMPLE: sent subscribe successful, msg_id=17886
|
||
|
|
I (4174) MQTTS_EXAMPLE: sent subscribe successful, msg_id=42970
|
||
|
|
I (4184) MQTTS_EXAMPLE: sent unsubscribe successful, msg_id=50241
|
||
|
|
I (4314) MQTTS_EXAMPLE: MQTT_EVENT_PUBLISHED, msg_id=41464
|
||
|
|
I (4484) MQTTS_EXAMPLE: MQTT_EVENT_SUBSCRIBED, msg_id=17886
|
||
|
|
I (4484) MQTTS_EXAMPLE: sent publish successful, msg_id=0
|
||
|
|
I (4684) MQTTS_EXAMPLE: MQTT_EVENT_SUBSCRIBED, msg_id=42970
|
||
|
|
I (4684) MQTTS_EXAMPLE: sent publish successful, msg_id=0
|
||
|
|
I (4884) MQTT_CLIENT: deliver_publish, message_length_read=19, message_length=19
|
||
|
|
I (4884) MQTTS_EXAMPLE: MQTT_EVENT_DATA
|
||
|
|
TOPIC=/topic/qos0
|
||
|
|
DATA=data
|
||
|
|
I (5194) MQTT_CLIENT: deliver_publish, message_length_read=19, message_length=19
|
||
|
|
I (5194) MQTTS_EXAMPLE: MQTT_EVENT_DATA
|
||
|
|
TOPIC=/topic/qos0
|
||
|
|
DATA=data
|
||
|
|
```
|
||
|
|
|