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Install the latest Arduino IDE from arduino.cc.
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Open Terminal and execute the following command (copy->paste and hit enter):
sudo usermod -a -G dialout $USER && \ if [ `python --version 2>&1 | grep '2.7' | wc -l` = "1" ]; then \ sudo zypper install git python-pip python-pyserial; \ else \ sudo zypper install git python3-pip python3-pyserial; \ fi && \ mkdir -p ~/Arduino/hardware/heltec && \ cd ~/Arduino/hardware/heltec && \ git clone https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series.git esp32 && \ cd esp32 && \ git submodule update --init --recursive && \ cd tools && \ python get.py && \
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Restart Arduino IDE