Raven build environment setup

raven.sh

#!/bin/bash
# author @doskoi
# Raven build environment setup

RAVENDIR="$HOME/raven"
ESPDIR="$RAVENDIR/esp"

mkdir -p $RAVENDIR

mkdir -p $ESPDIR

sudo apt update

sudo apt install build-essential git wget make libncurses-dev flex bison gperf python python-serial python-pip -y

cd $ESPDIR

git clone https://github.com/espressif/esp-idf.git

cd esp-idf

git checkout v3.0

git submodule init
git submodule update -r
git submodule update

export IDF_PATH=$ESPDIR/esp-idf
echo "export IDF_PATH=$ESPDIR/esp-idf" >> ~/.bash_profile

cd $ESPDIR

wget https://dl.espressif.com/dl/xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz

tar -xzf xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz

export PATH=$PATH:$ESPDIR/xtensa-esp32-elf/bin
echo "export PATH=$PATH:$ESPDIR/xtensa-esp32-elf/bin" >> ~/.bash_profile

cd $RAVENDIR

git clone --recursive https://github.com/RavenLRS/raven.git

cd raven

# Update shell 
source ~/.bash_profile

echo "Ready to make..."

To flash to chip, you have to use root to access USB device

Just simply run this in bash wget https://bit.ly/RavenLRS -O raven.sh && . ./raven.sh

Convert elf to binary
python $IDF_PATH/components/esptool_py/esptool/esptool.py --chip esp32 elf2image <PATH OF YOUR raven.elf>

Grant permission to access /dev/ttyUSB by command:
sudo usermod -a -G dialout $USER