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Install the latest Arduino IDE from arduino.cc.
$ sudo dnf -y install arduino
will most likely install an older release. -
Open Terminal and execute the following command (copy->paste and hit enter):
sudo usermod -a -G dialout $USER && \ sudo dnf install git python3-pip python3-pyserial && \ mkdir -p ~/Arduino/hardware && \ cd ~/Arduino/hardware && \ git clone https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series.git heltec && \ cd heltec/esp32 && \ git submodule update --init --recursive && \ cd tools && \ python get.py cd ~/Arduino/hardware/heltec/esp8266 && \ git submodule update --init --recursive && \ cd tools && \ python get.py
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Restart Arduino IDE