diff --git a/.travis.yml b/.travis.yml
index 9872643d..523fec4b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ script:
   - ./autogen.sh --enable-coverage && make all test
   - (cd src/lib/ebus/test && ./test_symbol && ./test_filereader && ./test_data && ./test_message)
   - ./src/ebusd/ebusd --help
+  - ./test_coverage.sh
 after_success:
   - find . -type f -name '*.gcno' -exec bash -c "(f={}; cd \${f%/*}; gcov -pb \${f##*/})" \;
   - bash <(curl -s https://codecov.io/bash) -X gcov
diff --git a/test_coverage.sh b/test_coverage.sh
new file mode 100755
index 00000000..8ac1a295
--- /dev/null
+++ b/test_coverage.sh
@@ -0,0 +1,178 @@
+#!/bin/bash
+./src/ebusd/ebusd --help >/dev/null
+./src/ebusd/ebusd -r -f -x >/dev/null 2>/dev/null
+./src/ebusd/ebusd -c contrib/etc/ebusd --checkconfig --dumpconfig -s -f "ff08070400/0ab5303132333431313131" >/dev/null
+php -r '
+error_reporting (E_ALL);
+set_time_limit (0);
+ob_implicit_flush ();
+if (($srv=socket_create(AF_INET, SOCK_STREAM, SOL_TCP))===false) die("server: create socket");
+if (socket_bind($srv, "127.0.0.1", 8876)===false) {
+  @socket_close($srv);
+  die("server: bind socket");
+}
+if (socket_listen($srv, 5)===false) {
+  @socket_close($srv);
+  die("server: listen socket");
+}
+echo "server: waiting\n";
+if (($cli=socket_accept($srv))===false) {
+  @socket_close($srv);
+  die("server: socket accept");
+}
+@socket_set_block($cli);
+$output="";
+$input=$hexinput="";
+echo "server: running\n";
+$endtime=time()+20;
+$firstsend=time()+5;
+while (time()<$endtime) {
+  if (($r=@socket_read($cli, 1))===false) break;
+  if (strlen($r)==0) break;
+  socket_write($cli, $r, 1);
+  if (ord($r[0])==0xaa) {
+    if (strlen($output)>0) {
+      echo "server: $output\n";
+      $output="";
+    }
+    if ($firstsend && time()>$firstsend) {
+      socket_write($cli, "\xff\x36\x07\x04\x00\x06\xaa",8);
+      socket_write($cli, "\xff\xfe\xb5\x16\x03\x01\x50\x30\x86\xaa",10);
+      $firstsend=0;
+    }
+  } else {
+    $output.=substr(dechex(0x100|ord($r[0])),1);
+    if ("31040704006f"==$output) { // answer on ident query
+      socket_write($cli, "\x00\x0a\x99\x42\x42\x42\x42\x42\x30\x31\x30\x31\x71",13);
+      $output.=">answered<";
+    } else if ("315307040091"==$output) { // answer on other ident query
+      socket_write($cli, "\x00\x0a\x99\x42\x42\x42\x42\x42\x30\x31\x30\x31\x71",13);
+      $output.=">answered<";
+    } else if ("311cb509030d0000e1"==$output || "3152b509030d0600c9"==$output || "3153b509030d060034"==$output) {
+      socket_write($cli, "\x00\x02\x40\x50\xb4",5);
+      $output.=">answered<";
+    } else if ("3153b505080290909090909003f6"==$output || "3153b509050e3500190030"==$output) {
+      socket_write($cli, "\x00\x00\x00",3);
+      $output.=">answered<";
+    } else {
+      $endtime=time()+10; // keep further alive
+    }
+  }
+}
+@socket_close($cli);
+@socket_close($srv);
+echo "server: done\n";
+' &
+srvpid=$!
+if [ -z "$srvpid" ]; then
+  echo "unable to start echo server"
+  exit 1
+fi
+sleep 1
+ps -p $srvpid >/dev/null
+status="$?"
+if [ ! "$status" = 0 ]; then
+  echo "unable to start echo server"
+  exit 1
+fi
+echo "server: $srvpid"
+cat >contrib/etc/ebusd/test.csv <<EOF
+u,broadcast,outsidetemp,,,fe,b516,01,temp2,m,D2B
+r2,rcc.4,RoomTemp,Raumisttemp,,1c,b509,0d0000,temp,s,D2C,,C
+r,mc.4,OutsideTemp,Sensor,,52,b509,0d0600,temp,s,D2C,,°C
+r,mc.5,Timer.Monday,,,53,b504,02,from,s,TTM,,,Slots 1-3,to,s,TTM,,,bis,from,s,TTM,,,Slot von/bis,to,s,TTM,,,bis,from,s,TTM,,,Slot von/bis,to,s,TTM,,,bis,daysel,s,UCH,0=selected;1=Mo-Fr;2=Sa-So;3=Mo-So,,Tage
+w,mc.5,Timer.Monday,,,53,b505,02,from,m,TTM,,,Slots 1-3,to,m,TTM,,,bis,from,m,TTM,,,Slot von/bis,to,m,TTM,,,bis,from,m,TTM,,,Slot von/bis,to,m,TTM,,,bis,daysel,m,UCH,0=selected;1=Mo-Fr;2=Sa-So;3=Mo-So,,Tage
+r,mc.5,HeatingCurve,,,53,b509,0d3500,curve,s,UIN,100
+w,mc.5,HeatingCurve,,,53,b509,0e3500,curve,m,UIN,100
+EOF
+./src/ebusd/ebusd -d tcp:127.0.0.1:8876 --initsend --latency 10000 -n -c "$PWD/contrib/etc/ebusd" --pollinterval=10 -s -a 31 --acquireretries 3 --answer --generatesyn --numbermasters 1 --receivetimeout 10000 --sendretries 1 --enablehex --htmlpath "$PWD/contrib/html" --httpport 8878 --localhost --pidfile "$PWD/ebusd.pid" -p 8877 -l "$PWD/ebusd.log" --logareas all --loglevel debug --lograwdata --dumpfile "$PWD/ebusd.dump" --dumpsize 100 -D
+pid=`head -n 1 "$PWD/ebusd.pid"`
+if [ -z "$pid" ]; then
+  echo "unable to start ebusd"
+  kill $srvpid
+  exit 1
+fi
+echo "ebusd: $pid"
+readarray lines <<EOF
+raw
+log
+log all notice
+grab
+info
+state
+scan full
+read -c "hallo du" ich
+h
+h r
+h w
+h hex
+h f
+h l
+h s
+h i
+h g
+h scan
+h log
+h raw
+h dump
+h reload
+h stop
+h q
+h h
+l &
+r -f temp
+r -f outsidetemp
+r -m 10 outsidetemp
+r -v outsidetemp
+r -c broadcast outsidetemp
+r -c mc.4 -d 53 -p 2 outsidetemp
+r -c mc.4 -d 53 -p 2 -i 1 outsidetemp temp.1
+r -c mc.4 -d 53 -p 2 -i 1 outsidetemp temp.0
+r -n -c mc.4 -d 53 -p 2 -i 1 outsidetemp temp.0
+r -h
+r -h 53070400
+f -f outsidetemp
+f -v -r temp
+f -v -w temp
+f -v -p temp
+f -d -i b5
+f -F name temp
+f -e RoomTemp
+f -e -c mc.5
+r -c mc.5 Timer.Monday
+w -c mc.5 Timer.Monday "-:-;-:-;-:-;-:-;-:-;-:-;Mo-So"
+w -c mc.5 -d 53 HeatingCurve 0.25
+w -h fe070400
+hex fe070400
+hex 53070400
+dump
+grab result
+reload
+EOF
+while [ ! "$status" = 0 ]; do
+  sleep 5
+  ./src/tools/ebusctl -p 8877 state | egrep -q "signal acquired"
+  status=$?
+done
+if [ "$status" = 0 ]; then
+  echo "got signal"
+  sleep 5
+  ./src/tools/ebusctl -p 8877 ""
+  for line in "${lines[@]}"; do
+    if [ -n "$line" ]; then
+      echo "send: $line"
+      ./src/tools/ebusctl -p 8877 $line
+    fi
+  done
+  while [ "$status" = 0 ]; do
+    ./src/tools/ebusctl -p 8877 scan result | egrep -q "still running"
+    status=$?
+  done
+  echo "scan result:"
+  ./src/tools/ebusctl -p 8877 scan result
+  echo "commands done"
+fi
+sleep 5
+kill $pid
+kill $srvpid
+echo "done."