diff --git a/.travis.yml b/.travis.yml
index e25f7c6d3a7..ce8c5869642 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,19 +11,22 @@ cache:
     - cache
 before_install:
 - cat build.config
-- export X_EMAIL=$(grep -E 'email=(.*)' build.config | cut -c 7-)
-- export X_BRANCH=$(grep -E 'branch=(.*)' build.config | cut -c 8-)
-- export X_MODULES=$(grep -E 'modules=(.*)' build.config | cut -c 9-)
-- export X_U8G_FONTS=$(grep -E 'u8g-fonts=(.*)' build.config | cut -c 11-)
-- export X_U8G_DISPLAY_I2C=$(grep -E 'u8g-display-i2c=(.*)' build.config | cut -c 17-)
-- export X_U8G_DISPLAY_SPI=$(grep -E 'u8g-display-spi=(.*)' build.config | cut -c 17-)
-- export X_UCG_DISPLAY_SPI=$(grep -E 'ucg-display-spi=(.*)' build.config | cut -c 17-)
-- export X_SSL_ENABLED=$(grep -E 'ssl-enabled=(.*)' build.config | cut -c 13-)
-- export X_DEBUG_ENABLED=$(grep -E 'debug-enabled=(.*)' build.config | cut -c 15-)
-- export X_FATFS_ENABLED=$(grep -E 'fatfs-enabled=(.*)' build.config | cut -c 15-)
-# count ',' in the string and add +1
-- export X_NUMBER_OF_MODULES=$((`echo $X_MODULES | tr -d -c ',' | wc -m`+1))
-- env | grep 'X_'
+
+- export X_EMAIL=$(grep -E '^email=' build.config | cut -f 2- -d '=')
+- export X_BRANCH=$(grep -E '^branch=' build.config | cut -f 2- -d '=')
+- export X_MODULES=$(grep -E '^modules=' build.config | cut -f 2- -d '=')
+- export X_U8G_FONTS=$(grep -E '^u8g-fonts=' build.config | cut -f 2- -d '=')
+- export X_U8G_DISPLAY_I2C=$(grep -E '^u8g-display-i2c=' build.config | cut -f 2- -d '=')
+- export X_U8G_DISPLAY_SPI=$(grep -E '^u8g-display-spi=' build.config | cut -f 2- -d '=')
+- export X_UCG_DISPLAY_SPI=$(grep -E '^ucg-display-spi=' build.config | cut -f 2- -d '=')
+- export X_LUA_FLASH_STORE=$(grep -E '^lfs-size=' build.config | cut -f 2- -d '=')
+- export X_SPIFFS_FIXED_LOCATION=$(grep -E '^spiffs-base=' build.config | cut -f 2- -d '=')
+- export X_SPIFFS_MAX_FILESYSTEM_SIZE=$(grep -E '^spiffs-size=' build.config | cut -f 2- -d '=')
+- export X_SSL_ENABLED=$(grep -E '^ssl-enabled=' build.config | cut -f 2- -d '=')
+- export X_DEBUG_ENABLED=$(grep -E '^debug-enabled=' build.config | cut -f 2- -d '=')
+- export X_FATFS_ENABLED=$(grep -E '^fatfs-enabled=' build.config | cut -f 2- -d '=')
+- export X_NUMBER_OF_MODULES=$(echo $X_MODULES | awk -F\, '{print NF}')
+- export -p | grep " X_"
 
 - wget -d -v -O/dev/null --tries=10 --timeout=15 --waitretry=30 --read-timeout=20 --retry-connrefused --no-check-certificate 'https://nodemcu-build.com/hook.php?event=start&recipient='${X_EMAIL//+/%2B}
 - git clone --depth=1 --branch=$X_BRANCH git://github.com/nodemcu/nodemcu-firmware.git nodemcu-firmware
@@ -33,12 +36,8 @@ before_install:
 
 # replace modules in user_modules.h by the selected ones
 - bash $TRAVIS_BUILD_DIR/set-modules.sh
-# comment the SSL flag in user_config.h if not enabled
-- bash $TRAVIS_BUILD_DIR/set-ssl.sh
-# set the NODE_DEBUG and COAP_DEBUG flags in user_config.h
-- bash $TRAVIS_BUILD_DIR/set-debug.sh
-# set the BUILD_FATFS flag in user_config.h
-- bash $TRAVIS_BUILD_DIR/set-fatfs.sh
+# set defines in user_config.h according to X_* variables
+- bash $TRAVIS_BUILD_DIR/set-config.sh
 # replace fonts in u8g_config.h by the selected ones
 - bash $TRAVIS_BUILD_DIR/set-fonts.sh
 # set I2C/SPI displays in u8g_config.h and ucg_config.h
@@ -101,3 +100,4 @@ branches:
   only:
     - builds
     - master
+
diff --git a/build.config b/build.config
index cc7ed1a5a69..8b89bd1ac5c 100644
--- a/build.config
+++ b/build.config
@@ -2,8 +2,12 @@ email=suvft@rkpvgr.pbz
 branch=dev
 modules=node,file,gpio,wifi,net,tmr,uart,mqtt,spi,http,ucg,u8g
 ssl-enabled=true
-debug-enabled=false
+debug-enabled=true
+fatfs-enabled=true
 u8g-fonts=font_6x10,font_chikita
 u8g-display-i2c=uc1611_dogm240_i2c
 u8g-display-spi=pcf8812_96x65_hw_spi
 ucg-display-spi=seps225_16x128x128_uvis_hw_spi, ucg_dev_seps225_16x128x128_univision, ucg_ext_seps225_16
+lfs-size=0x20000
+spiffs-base=0
+spiffs-size=0x200000
diff --git a/set-config.sh b/set-config.sh
new file mode 100755
index 00000000000..fda89235c1f
--- /dev/null
+++ b/set-config.sh
@@ -0,0 +1,66 @@
+#!/bin/bash
+#
+# user_config.h has a number of defines the are replaced according to their
+# corresponding env X_???? variable.
+#
+#  Define                  Uncomment if param        Set to param
+#  LUA_FLASH_STORE                >0                      Y
+#  SPIFFS_FIXED_LOCATION          >0                      Y
+#  SPIFFS_MAX_FILESYSTEM_SIZE     >0                      Y
+#  BUILD_FATFS                  "true"
+#  DEVELOP_VERSION              "true"
+#  SSL_ENABLED                  "true"
+#
+set -e
+
+# What is carried in the following variables is the sed replacement expression.
+# It makes all #defines commented by default.
+declare         lfs="// #\\1"
+declare spiffs_base="// #\\1"
+declare spiffs_size="// #\\1"
+declare       fatfs="// #\\1"
+declare       debug="// #\\1"
+declare         ssl="// #\\1"
+
+#if env var exists and is not "0"
+if [ ! -z "${X_LUA_FLASH_STORE}" ] && [ "${X_LUA_FLASH_STORE}" != "0" ]; then
+  printf "Enabling LFS, size = %s\\n" "${X_LUA_FLASH_STORE}"
+  lfs="#\\1 ${X_LUA_FLASH_STORE}"
+fi
+
+if [ ! -z "${X_SPIFFS_FIXED_LOCATION}" ] && [ "${X_SPIFFS_FIXED_LOCATION}" != "0" ]; then
+  printf "SPIFFS location offset = %s\\n" "${X_SPIFFS_FIXED_LOCATION}"
+  spiffs_base="#\\1 ${X_SPIFFS_FIXED_LOCATION}"
+fi
+
+if [ ! -z "${X_SPIFFS_MAX_FILESYSTEM_SIZE}" ] && [ "${X_SPIFFS_MAX_FILESYSTEM_SIZE}" != "0" ]; then
+  printf "SPIFFS size = %s\\n" "${X_SPIFFS_MAX_FILESYSTEM_SIZE}"
+  spiffs_size="#\\1 ${X_SPIFFS_MAX_FILESYSTEM_SIZE}"
+fi
+
+if [ "${X_DEBUG_ENABLED}" == "true" ]; then
+  echo "Enabling debug mode"
+  debug="#\\1"
+fi
+
+if [ "${X_FATFS_ENABLED}" == "true" ]; then
+  echo "Enabling FatFS"
+  fatfs="#\\1"
+fi
+
+if [ "${X_SSL_ENABLED}" == "true" ]; then
+  echo "Enabling SSL"
+  ssl="#\\1"
+fi
+
+# There's no option for sed in-place editing that works on both Unix and macOS
+# -> pipe to new file, then rename it
+sed -e "s!^.*\\(define *LUA_FLASH_STORE\\).*!$lfs!" \
+    -e "s!^.*\\(define *SPIFFS_FIXED_LOCATION\\).*!$spiffs_base!" \
+    -e "s!^.*\\(define *SPIFFS_MAX_FILESYSTEM_SIZE\\).*!$spiffs_size!" \
+    -e "s!^.*\\(define *BUILD_FATFS\\).*!$fatfs!" \
+    -e "s!^.*\\(define *CLIENT_SSL_ENABLE\\).*!$ssl!" \
+    -e "s!^.*\\(define *DEVELOP_VERSION\\).*!$debug!" \
+    user_config.h > user_config.h.new;
+
+mv user_config.h.new user_config.h;
diff --git a/set-debug.sh b/set-debug.sh
deleted file mode 100755
index f8f3beaab26..00000000000
--- a/set-debug.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/sh
-
-set -e
-
-echo "Debug enabled: " ${X_DEBUG_ENABLED};
-
-if [ "${X_DEBUG_ENABLED}" == "true" ]; then
-  echo "Enabling debug mode in user_config.h"
-  # http://stackoverflow.com/q/18272379/131929
-  awk 'NR==4{print "#define NODE_DEBUG\n#define COAP_DEBUG\n"}1' user_config.h > user_config.h.tmp && mv user_config.h.tmp user_config.h;
-fi
diff --git a/set-fatfs.sh b/set-fatfs.sh
deleted file mode 100755
index f282a54246e..00000000000
--- a/set-fatfs.sh
+++ /dev/null
@@ -1,14 +0,0 @@
-#!/bin/sh
-
-set -e
-
-echo "FatFs enabled:" "${X_FATFS_ENABLED}";
-
-if [ "${X_FATFS_ENABLED}" = "true" ]; then
-  echo "Enabling FatFs in user_config.h"
-  sed -e 's/\/\/ *#define BUILD_FATFS/#define BUILD_FATFS/g' user_config.h > user_config.h.tmp;
-else
-  echo "Disabling FatFs in user_config.h"
-  sed -e 's/#define BUILD_FATFS/\/\/#define BUILD_FATFS/g' user_config.h > user_config.h.tmp;
-fi
-mv user_config.h.tmp user_config.h;
diff --git a/set-ssl.sh b/set-ssl.sh
deleted file mode 100755
index 629979cf52a..00000000000
--- a/set-ssl.sh
+++ /dev/null
@@ -1,14 +0,0 @@
-#!/bin/sh
-
-set -e
-
-echo "SSL enabled:" "${X_SSL_ENABLED}";
-
-if [ "${X_SSL_ENABLED}" = "true" ]; then
-  echo "Enabling SSL in user_config.h"
-  sed -e 's/\/\/ *#define CLIENT_SSL_ENABLE/#define CLIENT_SSL_ENABLE/g' user_config.h > user_config.h.tmp;
-else
-  echo "Disabling SSL in user_config.h"
-  sed -e 's/#define CLIENT_SSL_ENABLE/\/\/ #define CLIENT_SSL_ENABLE/g' user_config.h > user_config.h.tmp;
-fi
-mv user_config.h.tmp user_config.h;