diff --git a/doku.md b/doku.md
index 5ba1485..e1c1ade 100644
--- a/doku.md
+++ b/doku.md
@@ -75,8 +75,12 @@ PlatformIO Library veraltet !!
 
 ### TIMER in OTA unterbrechen !!!!!
 
+
+
 ### further improvments
 with streamFile gzip encoded Files can be sent
 this reduces space on fs !
 new easier script needed to just convert to .gz
 maybe measure timings on ESP
+
+__=> use serveStatic because way simpler !__
diff --git a/lib/httpserver/httpserver.h b/lib/httpserver/httpserver.h
index aead5df..0595ac7 100644
--- a/lib/httpserver/httpserver.h
+++ b/lib/httpserver/httpserver.h
@@ -1,3 +1,5 @@
+// Wrapper for ESP8266WebServer with Filesystem as HTTP source
+
 #pragma once
 
 #include <ESP8266WebServer.h>
diff --git a/templ_platformio_ini b/templ_platformio_ini
index 1f5f0c9..7eba75b 100644
--- a/templ_platformio_ini
+++ b/templ_platformio_ini
@@ -8,23 +8,29 @@
 ; Please visit documentation for the other options and examples
 ; https://docs.platformio.org/page/projectconf.html
 
-[env]
+[platformio]
+description = ESP8266 Treppenlicht Steuerung
+default_envs = ota
+; test_dir = test
+data_dir = data_gz
+
+[env:hardware]
 platform = espressif8266
 board = nodemcuv2
 framework = arduino
 
-; for http files
 board_build.filesystem = littlefs
 board_build.ldscript = eagle.flash.4m1m.ld
 extra_scripts = pre:create_gz_files.py
-
 monitor_speed = 115200
 
 [env:serial]
+extends = env:hardware
 upload_protocol = esptool
 upload_speed = 921600
 
 [env:ota]
+extends = env:hardware
 ; OTA => https://docs.platformio.org/en/latest/platforms/espressif8266.html#over-the-air-ota-update
 upload_protocol = espota
 upload_port = <!! IP ADDRESS !!>
@@ -33,13 +39,46 @@ upload_flags =
   --host_port=<!! PORT !!>
   --auth=admin
 
+
 [env:debug]
+extends = env:hardware
 ; look at doku.md
 build_flags = -DWITH_DEBUGGING_ON -Os -g3 -ggdb3
 upload_protocol = esptool
 upload_speed = 921600
 
 
+# This file is used compile and run tests located in the `unit` directory.
+# For more info, see:
+# https://docs.platformio.org/en/latest/plus/unit-testing.html
+# https://github.com/ThrowTheSwitch/Unity
+# https://github.com/ThrowTheSwitch/Unity/blob/master/docs/UnityAssertionsReference.md
 
 
 
+# To prepare coverage data for lcov, add ${coverage.build_flags} to env:test build flags
+# To actually generate coverage report:
+# $ `pio test` / run the test `program` manually
+# $ lcov --include (readlink -f ../espurna)'/*' --capture --directory .pio/build/test/ --output-file test.info
+# $ genhtml --ignore-errors source test.info --output-directory out
+
+[coverage]
+build_flags = -lgcov -fprofile-arcs -ftest-coverage
+
+[env:test]
+extends = env:hardware
+
+
+[env:native]
+platform = native
+test_build_project_src = true
+build_flags =
+    -DMANUFACTURER="PLATFORMIO"
+    -DDEVICE="TEST"
+    -std=gnu++11
+    -g
+    -Os
+    -I lib/treppe
+    -I lib/PCA9685-Arduino
+
+