diff --git a/scripts/build.sh b/scripts/build.sh
new file mode 100644
index 000000000..392b01ac3
--- /dev/null
+++ b/scripts/build.sh
@@ -0,0 +1,189 @@
+#!/bin/bash
+set -e
+
+### Functions
+
+is_git() {
+    command -v git >/dev/null 2>&1 || return 1
+    command git rev-parse >/dev/null 2>&1 || return 1
+
+    return 0
+}
+
+stat_bytes() {
+    echo "size is:"
+    case "$(uname -s)" in
+        Darwin) stat -f %z "$1";;
+        *) stat -c %s "$1";;
+    esac
+}
+
+# Available environments
+list_envs() {
+    grep env: ../platformio.ini | sed 's/\[env:\(.*\)\]/\1/g'
+}
+
+print_available() {
+    echo "--------------------------------------------------------------"
+    echo "Available environments:"
+    for environment in $available; do
+        echo "-> $environment"
+    done
+}
+
+print_environments() {
+    echo "--------------------------------------------------------------"
+    echo "Current environments:"
+    for environment in $environments; do
+        echo "-> $environment"
+    done
+}
+
+set_default_environments() {
+    # Hook to build in parallel when using travis
+    if [[ "${TRAVIS_BUILD_STAGE_NAME}" = "Release" ]] && ${par_build}; then
+        environments=$(echo ${available} | \
+            awk -v par_thread=${par_thread} -v par_total_threads=${par_total_threads} \
+            '{ for (i = 1; i <= NF; i++) if (++j % par_total_threads == par_thread ) print $i; }')
+        return
+    fi
+
+    # Only build travis target
+    if [[ "${TRAVIS_BUILD_STAGE_NAME}" = "Test" ]]; then
+        environments=$travis
+        return
+    fi
+
+    # Fallback to all available environments
+    environments=$available
+}
+
+build_webui() {
+    cd ../tools/webfilesbuilder
+
+    # Build system uses gulpscript.js to build web interface
+    if [ ! -e node_modules/gulp/bin/gulp.js ]; then
+        echo "--------------------------------------------------------------"
+        echo "Installing dependencies..."
+        npm ci
+    fi
+
+    # Recreate web interface - "node ./tools/webfilesbuilder/node_modules/gulp/bin/gulp.js --cwd ./tools/webfilesbuilder"
+    echo "--------------------------------------------------------------"
+    echo "Building web interface..."
+    node node_modules/gulp/bin/gulp.js || exit
+
+    # TODO: do something if webui files are different
+    # for now, just print in travis log
+    if ${TRAVIS:-false}; then
+        git --no-pager diff --stat
+    fi
+
+    cd ../..
+}
+
+build_environments() {
+    echo "--------------------------------------------------------------"
+    echo "Building firmware images..."
+    mkdir -p $destination/EMS-ESP-$version
+
+    for environment in $environments; do
+        echo -n "* EMS-ESP-$version-$environment.bin --- "
+        platformio run --silent --environment $environment || exit 1
+        stat_bytes .pio/build/$environment/firmware.bin
+        [[ "${TRAVIS_BUILD_STAGE_NAME}" = "Test" ]] || \
+            mv .pio/build/$environment/firmware.bin $destination/EMS-ESP-$version/EMS-ESP-$version-$environment.bin
+    done
+    echo "--------------------------------------------------------------" 
+}
+
+
+####### MAIN
+
+destination=firmware
+version_file=../src/version.h
+version=$(grep -E '^#define APP_VERSION' $version_file | awk '{print $3}' | sed 's/"//g')
+
+if ${TRAVIS:-false}; then
+    git_revision=${TRAVIS_COMMIT::7}
+    git_tag=${TRAVIS_TAG}
+elif is_git; then
+    git_revision=$(git rev-parse --short HEAD)
+    git_tag=$(git tag --contains HEAD)
+else
+    git_revision=unknown
+    git_tag=
+fi
+
+if [[ -n $git_tag ]]; then
+    new_version=${version/-*}
+    sed -i -e "s@$version@$new_version@" $version_file
+    version=$new_version
+    trap "git checkout -- $version_file" EXIT
+fi
+
+par_build=false
+par_thread=${BUILDER_THREAD:-0}
+par_total_threads=${BUILDER_TOTAL_THREADS:-4}
+if [ ${par_thread} -ne ${par_thread} -o \
+    ${par_total_threads} -ne ${par_total_threads} ]; then
+    echo "Parallel threads should be a number."
+    exit
+fi
+if [ ${par_thread} -ge ${par_total_threads} ]; then
+    echo "Current thread is greater than total threads. Doesn't make sense"
+    exit
+fi
+
+travis=$(list_envs | grep travis | sort)
+available=$(list_envs | grep -Ev -- 'travis|debug' | sort)
+
+export PLATFORMIO_BUILD_FLAGS="${PLATFORMIO_BUILD_FLAGS}"
+
+# get command line Parameters
+# l prints environments
+# 2 does parallel builds
+# d uses next arg as destination folder
+while getopts "lpd:" opt; do
+  case $opt in
+    l)
+        print_available
+        exit
+        ;;
+    p)
+        par_build=true
+        ;;
+    d)
+        destination=$OPTARG
+        ;;
+    esac
+done
+
+shift $((OPTIND-1))
+
+# Welcome message
+echo "--------------------------------------------------------------"
+echo "EMS-ESP FIRMWARE BUILDER"
+echo "Building for version ${version}" ${git_revision:+($git_revision)}
+
+# Environments to build
+environments=$@
+
+if [ $# -eq 0 ]; then
+    set_default_environments
+fi
+
+if ${CI:-false}; then
+    print_environments
+fi
+
+# for debugging
+echo "* git_revision = $git_revision"
+echo "* git_tag = $git_tag"
+echo "* TRAVIS_EVENT_TYPE = $TRAVIS_EVENT_TYPE"
+echo "* TRAVIS_TAG = $TRAVIS_TAG"
+echo "* TRAVIS_BRANCH = $TRAVIS_BRANCH"
+echo "* TRAVIS_BUILD_STAGE_NAME = $TRAVIS_BUILD_STAGE_NAME"
+
+build_webui
+build_environments