esp32-mqtt is a sandbox to explore the MQTT capabilities of the ESP32, for example:
- connect to AWS IoT broker using ssl transport with client certificate, see example 1
- connect to local broker using ssl transport with PSK, see example 2
Note: ESP-IDF is added as a submodule mainly for reference (to browse the ESP32 libraries if necessary). You can use it to install the toolchain or clone the original repo. If you use the submodule you need to initialize the submodules recursively first:
$ git submodule update --init --recursive
TLDR installation steps (Fedora 38):
$ sudo dnf upgrade --refresh
$ sudo dnf install git wget flex bison gperf python3 cmake ninja-build ccache dfu-util libusbx
$ mkdir -p ~/esp
$ cd ~/esp
$ git clone --recursive https://github.com/espressif/esp-idf.git
$ cd ~/esp/esp-idf
$ ./install.sh esp32
$ . $HOME/esp/esp-idf/export.sh
$ cd <example>
$ idf.py menuconfig
# configure Wi-Fi under "Example Connection Configuration" menu (WiFi SSID and WiFi Password), save and quit
$ idf.py build
$ sudo usermod -a -G dialout $USER
# restart your terminal
$ cd <example>
$ idf.py flash
If you encounter the following problem:
$ idf.py flash
Executing action: flash
Serial port /dev/ttyUSB0
/dev/ttyUSB0 failed to connect: Could not open /dev/ttyUSB0, the port doesn't exist
No serial ports found. Connect a device, or use '-p PORT' option to set a specific port.
Unplug and replug your ESP32 board, then:
$ sudo chmod a rw /dev/ttyUSB0
$ idf.py flash
$ sudo screen /dev/ttyUSB0 115200
If you want to quit press Ctlr A then D.