diff --git a/config/sys.config b/config/sys.config
new file mode 100644
index 0000000..eb8cc99
--- /dev/null
+++ b/config/sys.config
@@ -0,0 +1,17 @@
+[
+ {rolnik, [
+           {lower_limit, 5},
+           {upper_limit, 30},
+           {temp_check_freq, 1000},
+           {checks_per_sample, 60},
+           {normal_status_return_limit, 0.5},
+           {smtp_config, [
+                          {relay, {192,168,0,111}},
+                          {ssl, true},
+                          {username, "login@mail.com"},
+                          {password, "mailpassword"}
+                         ]},
+           {alarm_sender_email, "login@mail.com"},
+           {alarm_receiver_email, "receiveremail@mail.com"}
+          ]}
+].
\ No newline at end of file
diff --git a/config/test.config b/config/test.config
new file mode 100644
index 0000000..d90b8f3
--- /dev/null
+++ b/config/test.config
@@ -0,0 +1,28 @@
+[
+ {rolnik, [
+           {lower_limit, 5},
+           {upper_limit, 30},
+           {temp_check_freq, 1000},
+           {checks_per_sample, 60},
+           {normal_status_return_limit, 0.5},
+           {smtp_config, [
+                          {relay, {192,168,0,111}},
+                          {ssl, true},
+                          {username, "login@mail.com"},
+                          {password, "mailpassword"}
+                         ]},
+           {alarm_sender_email, "login@mail.com"},
+           {alarm_receiver_email, "receiveremail@mail.com"}
+          ]},
+ {grisp, [
+            {drivers, [
+             {spi, grisp_spi_drv_emu},
+             {gpio, grisp_gpio_drv_emu},
+             {i2c, grisp_i2c_drv_emu}
+        ]},
+            {devices, [
+             {spi1, pmod_nav},
+             {spi2, pmod_gyro}
+        ]}
+    ]}
+].
diff --git a/grisp/grisp_base/files/erl_inetrc b/grisp/grisp_base/files/erl_inetrc
new file mode 100644
index 0000000..758f85a
--- /dev/null
+++ b/grisp/grisp_base/files/erl_inetrc
@@ -0,0 +1,11 @@
+% Add hosts
+{host, {192,168,0,32}, ["yourpc-name"]}.
+
+% Do not monitor the hosts file
+{hosts_file, ""}.
+
+% Disable caching
+{cache_size, 0}.
+
+% Specify lookup method
+{lookup, [file, native]}.
\ No newline at end of file
diff --git a/grisp/grisp_base/files/grisp.ini.mustache b/grisp/grisp_base/files/grisp.ini.mustache
new file mode 100644
index 0000000..30794e6
--- /dev/null
+++ b/grisp/grisp_base/files/grisp.ini.mustache
@@ -0,0 +1,11 @@
+[boot]
+image_path = /media/mmcsd-0-0/{{release_name}}/erts-{{erts_vsn}}/bin/beam.bin
+
+[erlang]
+args = erl.rtems -- -home . -pa . -root {{release_name}} -boot {{release_name}}/releases/{{release_version}}/{{release_name}} -internal_epmd epmd_sup -kernel inetrc "./erl_inetrc" -sname {{release_name}} -setcookie test -config {{release_name}}/releases/{{release_version}}/sys.config
+
+[network]
+ip_self = dhcp
+wlan = enable
+hostname = grisp
+wpa = wpa_supplicant.conf
diff --git a/grisp/grisp_base/files/wpa_supplicant.conf b/grisp/grisp_base/files/wpa_supplicant.conf
new file mode 100644
index 0000000..be1e2b0
--- /dev/null
+++ b/grisp/grisp_base/files/wpa_supplicant.conf
@@ -0,0 +1,5 @@
+network={
+    ssid="network_name"
+    key_mgmt=WPA-PSK
+    psk="password"
+}
diff --git a/rebar.config b/rebar.config
index 72b5df4..7e552ca 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,4 +1,8 @@
-{deps, [grisp]}.
+{deps, [
+    {grisp, {git, "git://github.com/grisp/grisp.git"}},
+    {epmd, {git, "https://github.com/erlang/epmd", {ref, "4d1a59"}}},
+    {gen_smtp, ".*", {git, "https://github.com/Vagabond/gen_smtp.git", "master"}}
+]}.
 
 {erl_opts, [debug_info]}.
 
@@ -7,15 +11,30 @@
         {version, "20.2"}
     ]},
     {deploy, [
-        {destination, "/tmp/sd_card"}
+        {pre_script, "rm -rf /run/media/seb/GRISP/*"},
+        {destination, "/run/media/seb/GRISP"},
+        {post_script, "umount /run/media/seb/GRISP"}
     ]},
     {toolchain, [
-        {root, "/Users/michalslaski/dev/GRiSP/grisp-software/rtems-install/rtems-4.12"}
+        {root, "/home/seb/GRiSP/grisp-software/rtems-install/rtems-4.12"}
     ]}
 ]}.
 
 {shell, [{apps, []}]}.
 
 {relx, [
-    {release, {rolnik, "0.1.0"}, [rolnik]}
+    {release,
+        {rolnik, "0.1.0"},
+        [{epmd, none}, gen_smtp, rolnik],
+        [{sys_config, "./config/sys.config"}]}
+]}.
+
+
+{profiles, [
+    {test, [
+        {shell, [{apps, [rolnik]},
+            {config, "config/test.config"}
+        ]}
+    ]}
 ]}.
+
diff --git a/rebar.lock b/rebar.lock
new file mode 100644
index 0000000..165a292
--- /dev/null
+++ b/rebar.lock
@@ -0,0 +1,18 @@
+{"1.1.0",
+[{<<"epmd">>,
+  {git,"https://github.com/erlang/epmd",
+       {ref,"4d1a595b9d5c32fc0e55f462da381de62de23bf0"}},
+  0},
+ {<<"gen_smtp">>,
+  {git,"https://github.com/Vagabond/gen_smtp.git",
+       {ref,"e07022695735fe3b3eaf0fca52d85e91eef2a67f"}},
+  0},
+ {<<"grisp">>,
+  {git,"git://github.com/grisp/grisp.git",
+       {ref,"23860074abb8de6c77cee5a11e1a5b2685060260"}},
+  0},
+ {<<"mapz">>,{pkg,<<"mapz">>,<<"0.3.0">>},1}]}.
+[
+{pkg_hash,[
+ {<<"mapz">>, <<"438D24746CE5A252101E00B2032EFDF7FC69EB32689D3B805DE5E6DD7F52614F">>}]}
+].
diff --git a/src/rolnik.app.src b/src/rolnik.app.src
index a2dcb26..914fe18 100644
--- a/src/rolnik.app.src
+++ b/src/rolnik.app.src
@@ -6,6 +6,7 @@
     {applications, [
         kernel,
         stdlib,
+        gen_smtp,
         grisp
     ]},
     {env,[]},
diff --git a/src/rolnik_notifier.erl b/src/rolnik_notifier.erl
new file mode 100644
index 0000000..5f18797
--- /dev/null
+++ b/src/rolnik_notifier.erl
@@ -0,0 +1,66 @@
+%% @doc 
+%% @end
+-module(rolnik_notifier).
+
+-behaviour(gen_server).
+
+%% API
+-export([start_link/1, alarm/1]).
+
+%% gen_server callbacks
+-export([init/1, handle_call/3, handle_cast/2, terminate/2, code_change/3]).
+
+-record(state, {socket_info, sender_email, receiver_email}).
+
+%% API 
+
+%% @doc Starts rolnik_notifier which handles sending alarm messages to client
+%% when temperature status changes from normal  
+-spec start_link(Args :: list()) -> {ok, pid()} | ignore | {error, term()}.
+start_link(Args)->
+    gen_server:start_link({local, ?MODULE}, ?MODULE, Args, []).
+
+%% @doc Starts rolnik_notifier which handles sending alarm messages to client
+-spec alarm(Status :: atom()) -> ok.
+alarm(Status) ->
+    gen_server:call(?MODULE, {alarm, Status}).
+
+%% gen_server callbacks
+
+init([SmtpConfig, Sender, Receiver]) ->
+    process_flag(trap_exit, true),
+    SocketInfo = open_socket_for_notify(SmtpConfig),
+    {ok, #state{socket_info = SocketInfo, sender_email = Sender,
+                receiver_email = Receiver}}.
+
+handle_call({alarm, below}, _From, State) ->
+    Message = "Subject: Temperature Warning\r\nFrom: GRISP board \r\n
+              Temperature dropped below the lower limit.",
+    send(Message, State),
+    {reply, ok, State};
+handle_call({alarm, above}, _From, State) ->
+    Message = "Subject: Temperature Warning\r\nFrom: GRISP board \r\n
+              Temperature rised above the upper limit.",
+    send(Message, State),
+    {reply, ok, State}.
+
+handle_cast(_Msg, State) ->
+    {noreply, State}.
+
+terminate(_Reason, _State) ->
+    ok.
+
+code_change(_OldVsn, State, _Extra) ->
+    {ok, State}.
+
+%% Internal functions
+
+open_socket_for_notify(SmtpConfig) ->
+    {ok, SocketInfo} = gen_smtp_client:open(SmtpConfig),
+    SocketInfo.
+
+send(Message, #state{socket_info = SocketInfo, sender_email = Sender,
+                     receiver_email = Receiver}) ->
+    % Info backup to implement
+    {ok, _Info} = gen_smtp_client:deliver(SocketInfo, {Sender, [Receiver],
+                                                       Message}).
diff --git a/src/rolnik_sup.erl b/src/rolnik_sup.erl
index fdb126b..7c66936 100644
--- a/src/rolnik_sup.erl
+++ b/src/rolnik_sup.erl
@@ -11,9 +11,59 @@
 -export([init/1]).
 
 %--- API -----------------------------------------------------------------------
-
-start_link() -> supervisor:start_link({local, ?MODULE}, ?MODULE, []).
+%% @doc Starts rolnik top level supervisor.
+-spec start_link() -> {ok, pid()} | ignore | {error, term()}.
+start_link() ->
+    {ok, Pid} = supervisor:start_link({local, ?MODULE}, ?MODULE, []),
+    %% start event handlers
+    {ok, LowerLimit} = application:get_env(rolnik, lower_limit),
+    {ok, UpperLimit} = application:get_env(rolnik, upper_limit),
+    {ok, ChecksPerSample} = application:get_env(rolnik, checks_per_sample),
+    {ok, StatusReturnLimit} = application:get_env(rolnik, normal_status_return_limit),
+    ok = gen_event:add_handler(rolnik_temp_notify_manager,
+                               rolnik_temp_limit_handler,
+                               [LowerLimit, UpperLimit, ChecksPerSample,
+                                StatusReturnLimit]),
+    ok = gen_event:add_handler(rolnik_temp_notify_manager,
+                               rolnik_temp_backup_handler, []),
+    {ok, Pid}.
 
 %--- Callbacks -----------------------------------------------------------------
 
-init([]) -> {ok, { {one_for_all, 0, 1}, []} }.
+init([]) ->
+    {ok, SmtpConfig} = application:get_env(rolnik, smtp_config),
+    {ok, Sender} = application:get_env(rolnik, alarm_sender_email),
+    {ok, Receiver} = application:get_env(rolnik, alarm_receiver_email),
+    {ok, TempCheckFreq} = application:get_env(rolnik, temp_check_freq),
+    SensorId = get_sensor_id(),
+    SupFlags = #{strategy => one_for_one, intensity => 1, period => 5},
+    ChildSpecs = [
+                  %% start rolnik_notifier
+                  #{id => rolnik_notifier_id,
+                    start => {rolnik_notifier, start_link, [[SmtpConfig,
+                                                             Sender, Receiver]]},
+                    restart => permanent,
+                    shutdown => brutal_kill,
+                    type => worker,
+                    modules => [rolnik_notifier]},
+                  %% start event manager
+                  {rolnik_temp_notify_manager, {gen_event, start_link,
+                                        [{local, rolnik_temp_notify_manager}]},
+                   permanent, 5000, worker, [dynamic]},
+                  %% start rolnik_temp_checker
+                  #{id => rolnik_temp_checker_id,
+                    start => {rolnik_temp_checker, start_link, [[TempCheckFreq,
+                                                                 SensorId]]},
+                    restart => permanent,
+                    shutdown => brutal_kill,
+                    type => worker,
+                    modules => [rolnik_temp_checker]}
+                 ],
+    {ok, {SupFlags, ChildSpecs}}.
+
+%% Internal functions
+
+get_sensor_id() ->
+    [ID] = grisp_onewire:transaction(fun() -> grisp_onewire:search() end),
+    ID.
+
diff --git a/src/rolnik_temp_backup_handler.erl b/src/rolnik_temp_backup_handler.erl
new file mode 100644
index 0000000..339eb42
--- /dev/null
+++ b/src/rolnik_temp_backup_handler.erl
@@ -0,0 +1,29 @@
+-module(rolnik_temp_backup_handler).
+-behaviour(gen_event).
+
+-export([init/1, handle_event/2, handle_call/2, handle_info/2, code_change/3,
+         terminate/2]).
+
+-record(state, {temps = []}).
+
+init([]) ->
+    {ok, #state{}}.
+
+handle_event(TimeTempData, #state{temps = TempsBackup}) ->
+    UpdatedTempsBackup = [TimeTempData | TempsBackup],
+    NewState = #state{temps = UpdatedTempsBackup},
+    {ok, NewState}.
+
+handle_call(_, State) ->
+    {ok, ok, State}.
+
+handle_info(_, State) ->
+    {ok, State}.
+
+code_change(_OldVsn, State, _Extra) ->
+    {ok, State}.
+
+terminate(_Reason, _State) ->
+    ok.
+
+%% Internal functions
diff --git a/src/rolnik_temp_checker.erl b/src/rolnik_temp_checker.erl
new file mode 100644
index 0000000..7a1e862
--- /dev/null
+++ b/src/rolnik_temp_checker.erl
@@ -0,0 +1,69 @@
+%% @doc 
+%% @end
+-module(rolnik_temp_checker).
+
+-behaviour(gen_server).
+
+%% API
+-export([start_link/1]).
+
+%% gen_server callbacks
+-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
+         terminate/2, code_change/3]).
+
+-record(state, {temp_check_freq, sensor_id}).
+
+%% API 
+
+%% @doc Starts rolnik_temp_checker which notifies rolnik_temp_notify_manager
+%% about temperature with given frequency 
+-spec start_link(Args :: list()) -> {ok, pid()} | ignore | {error, term()}.
+start_link(Args) ->
+    gen_server:start_link({local, ?MODULE}, ?MODULE, Args, []).
+
+%% gen_server callbacks
+
+init([TempCheckFreq, SensorId]) ->
+    process_flag(trap_exit, true),
+    %% Request first update after giving time for whole app to start
+    ?MODULE ! temp_update,
+    ok = led_start_notify(),
+    {ok, #state{temp_check_freq = TempCheckFreq, sensor_id = SensorId}}.
+
+handle_call(_Msg, _From, State) ->
+    {reply, ok, State}.
+
+handle_cast(_Msg, State) ->
+    {noreply, State}.
+
+handle_info(temp_update, State = #state{temp_check_freq = Lag, sensor_id = Id}) ->
+    ok = request_temp_update_after_lag(Lag),
+    {ok, NewTemp} = get_temp(Id),
+    ok = temp_notify(NewTemp),
+    {noreply, State}.
+
+terminate(_Reason, _State) ->
+    ok.
+
+code_change(_OldVsn, State, _Extra) ->
+    {ok, State}.
+
+%% Internal functions
+led_start_notify() ->
+    grisp_led:color(1, aqua),
+    ok.
+
+request_temp_update_after_lag(Lag) ->
+    erlang:send_after(Lag, ?MODULE, temp_update),
+    ok.
+
+get_temp(Id) ->
+    ok = onewire_ds18b20:convert(Id, 500),
+    Temp = onewire_ds18b20:temp(Id),
+    {ok, Temp}.
+
+temp_notify(Temp) ->
+    Time = erlang:localtime(),
+    TimeTempData = {Time, Temp},
+    gen_event:notify(rolnik_temp_notify_manager, TimeTempData),
+    ok.
diff --git a/src/rolnik_temp_limit_handler.erl b/src/rolnik_temp_limit_handler.erl
new file mode 100644
index 0000000..d33b6a2
--- /dev/null
+++ b/src/rolnik_temp_limit_handler.erl
@@ -0,0 +1,86 @@
+-module(rolnik_temp_limit_handler).
+-behaviour(gen_event).
+
+-export([init/1, handle_event/2, handle_call/2, handle_info/2, code_change/3,
+         terminate/2]).
+
+-record(state, {current_sample_temps = [], current_temp_status = normal,
+                upper_limit, lower_limit, checks_per_sample,
+                status_return_limit}).
+
+init([LowerLimit, UpperLimit, ChecksPerSample, StatusReturnLimit]) ->
+    {ok, #state{lower_limit = LowerLimit, upper_limit = UpperLimit,
+                checks_per_sample = ChecksPerSample,
+                status_return_limit = StatusReturnLimit}}.
+
+handle_event({_Time, Temp}, State = #state{current_temp_status = CurrStatus,
+                                           current_sample_temps = Temps,
+                                           checks_per_sample = ChecksPerSample})
+  when length(Temps) == (ChecksPerSample - 1) ->
+    UpdatedTemps = [Temp | Temps],
+    NewTempStatus = new_temp_status(State, UpdatedTemps), 
+    case make_decision(NewTempStatus, CurrStatus) of
+        do_nothing -> ok;
+        alarm -> send(NewTempStatus)
+    end,
+    NewState = State#state{current_sample_temps = [],
+                           current_temp_status = NewTempStatus},
+    {ok, NewState};
+handle_event({_Time, Temp}, State = #state{current_sample_temps = Temps}) ->
+    UpdatedTemps = [Temp | Temps],
+    NewState = State#state{current_sample_temps = UpdatedTemps},
+    {ok, NewState}.
+
+handle_call(_, State) ->
+    {ok, ok, State}.
+
+handle_info(_, State) ->
+    {ok, State}.
+
+code_change(_OldVsn, State, _Extra) ->
+    {ok, State}.
+
+terminate(_Reason, _State) ->
+    ok.
+
+%% Internal functions
+
+new_temp_status(#state{current_temp_status = CurrStatus,
+                       lower_limit = LowerLimit, upper_limit = UpperLimit,
+                       status_return_limit = StatusReturnLimit}, Temps) ->
+    AvrgTemp = average(Temps),
+    verify_average_temp(CurrStatus, AvrgTemp, LowerLimit, UpperLimit,
+                        StatusReturnLimit).
+
+average(List) ->
+    lists:sum(List) / length(List).
+
+verify_average_temp(normal, Temp, LowerLimit, _UpperLimit, _StatusReturnLimit)
+  when Temp < LowerLimit ->
+    below;
+verify_average_temp(normal, Temp, _LowerLimit, UpperLimit, _StatusReturnLimit)
+  when Temp > UpperLimit ->
+    above;
+verify_average_temp(below, Temp, LowerLimit, _UpperLimit, StatusReturnLimit)
+  when Temp > (LowerLimit + StatusReturnLimit) ->
+    normal;
+verify_average_temp(above, Temp, _LowerLimit, UpperLimit, StatusReturnLimit) 
+  when Temp < (UpperLimit - StatusReturnLimit) ->
+    normal;
+verify_average_temp(below, _Temp, _LowerLimit, _UpperLimit, _StatusReturnLimit) ->
+    below;
+verify_average_temp(above, _Temp, _LowerLimit, _UpperLimit, _StatusReturnLimit) ->
+    above;
+verify_average_temp(normal, _Temp, _LowerLimit, _UpperLimit, _StatusReturnLimit) ->
+    normal.
+
+
+make_decision(below, normal) ->
+    alarm;
+make_decision(above, normal) ->
+    alarm;
+make_decision(_NewStatus, _CurrStatus) ->
+    do_nothing.
+
+send(Status) ->
+    ok = rolnik_notifier:alarm(Status).