MQTT Broker for esp-idf.
This project use Mongoose networking library.
I forked from here.
However, with the release of mongoose ver7, I rewrote it.
Your fork is welcome.
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In this project directory, create a components directory.
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In the components directory, clone Mongoose version 7.9:
git clone -b 7.9 https://github.com/cesanta/mongoose.git
- In the new Mongoose directory, create a CMakeLists.txt file containing:
idf_component_register(SRCS "mongoose.c" PRIV_REQUIRES esp_timer INCLUDE_DIRS ".")
- Compile this project.
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mongoose version 7.9.
The version of mongoose is written here. -
ESP-IDF V5.0 or later.
ESP-IDF V4.4 release branch reached EOL in July 2024.
git clone https://github.com/nopnop2002/esp-idf-mqtt-broker
cd esp-idf-mqtt-broker
mkdir components
cd components/
git clone -b 7.9 https://github.com/cesanta/mongoose.git
cd mongoose/
echo "idf_component_register(SRCS \"mongoose.c\" PRIV_REQUIRES esp_timer INCLUDE_DIRS \".\")" > CMakeLists.txt
cd ../..
idf.py set-target {esp32/esp32s2/esp32s3/esp32c2/esp32c3/esp32c6}
idf.py menuconfig
idf.py flash monitor
SSID:SSID of your Wifi router
ESP32 get IP using DHCP.
SSID:SSID of your Wifi router
ESP32 set your specific IP.
You can connect using the mDNS hostname instead of the IP address.
You can change mDNS hostname using menuconfig.
SSID:SSID of ESP32
ESP32 have 192.168.4.1.
When authentication is enabled, a username and password are required to connect to the server.
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will topics
will qos and will retain are ignored. -
Unsupported MQTT request
Do not respond to these MQTT requests:
PUBREC
PUBREL
PUBCOMP
$ sudo apt install mosquitto-clients moreutils
$ chmod 777 ./mqtt_sub.sh
$ ./mqtt_pub.sh
$ sudo apt install mosquitto-clients moreutils
$ chmod 777 ./mqtt_sub.sh
$ ./mqtt_sub.sh
23/02/19 12:35:16 topic 2023/02/19-12:35:16
23/02/19 12:35:17 topic 2023/02/19-12:35:17
23/02/19 12:35:18 topic 2023/02/19-12:35:18
23/02/19 12:35:19 topic 2023/02/19-12:35:19
23/02/19 12:35:21 topic 2023/02/19-12:35:20
- In Terminal #1, do the following:
$ mosquitto_sub -v -h esp32-broker.local -p 1883 -t "topic/#" --will-topic "topic/will" --will-payload "GOODBYE"
- Open new terminal. In Terminal #2, do the following:
$ mosquitto_sub -v -h esp32-broker.local -p 1883 -t "topic/#"
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Press Control+C in Terminal #1:
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The following is displayed in Terminal #2:
topic/will GOODBYE
V2 of the Paho library was released in February 2024.
$ python3 -m pip install -U paho-mqtt
$ python3 unsub_example.py
Connected with result code 0
subscribe hoge
Received message 'b'test'' on topic 'hoge/1' with QoS 1
unsubscribe hoge, subscribe fuga
Received message 'b'test'' on topic 'fuga/1' with QoS 1
unsubscribe fuga, subscribe hoge
First, it subscribes to the topic [hoge/#].
When it receives the topic [hoge/1], it unsubscribes [hoge/#] and subscribes to [fuga/#].
When it receives the topic [fuga/1], it unsubscribes [fuga/#] and subscribes to [hoge/#] again.
The message flows like this:
PUBLISH->BROKER->SUBSCRIBE
mosquitto broker is here.
mosquitto broker supports not only WiFi but also Ethernet.
mosquitto broker supports TLS transport layer.
git clone --recursive https://github.com/espressif/esp-protocols
cd esp-protocols/components/mosquitto/
cd examples/broker/
idf.py menuconfig
idf.py build