diff --git a/src/monocoque/devices/serialdevice.c b/src/monocoque/devices/serialdevice.c
index d607396..318b333 100644
--- a/src/monocoque/devices/serialdevice.c
+++ b/src/monocoque/devices/serialdevice.c
@@ -70,6 +70,91 @@ int arduino_shiftlights_update(SimDevice* this, SimData* simdata)
     return result;
 }
 
+int arduino_simled_update(SimDevice* this, SimData* simdata)
+{
+    SerialDevice* serialdevice = (void *) this->derived;
+    int result = 1;
+
+    int total_leds = serialdevice->numleds;
+    size_t bufsize = (total_leds * 3) + 14;
+    char bytes[bufsize];
+    int endled = serialdevice->endled;
+    int startled = serialdevice->startled;
+    if(endled == 0)
+    {
+        endled = total_leds;
+    }
+    int num_avail_leds = endled - startled + 1;
+    int rpm = simdata->rpms;
+    int maxrpm = simdata->maxrpm;
+    int litleds = 0;
+    if(rpm > 0 && maxrpm > 0)
+    {
+        int rpmmargin = ceil(.05*maxrpm);
+        int rpminterval = (maxrpm-rpmmargin) / (num_avail_leds);
+
+
+        for (int l = 1; l <= (num_avail_leds); l++)
+        {
+            if(rpm >= (rpminterval * l))
+            {
+                litleds = l;
+            }
+        }
+
+
+
+        for(int j = 0; j < bufsize; j++)
+        {
+            bytes[j] = 0x00;
+        }
+        bytes[0] = 0xff;
+        bytes[1] = 0xff;
+        bytes[2] = 0xff;
+        bytes[3] = 0xff;
+        bytes[4] = 0xff;
+        bytes[5] = 0xff;
+        bytes[6] = 0x73;
+        bytes[7] = 0x6c;
+        bytes[8] = 0x65;
+        bytes[9] = 0x64;
+        bytes[10] = 0x73;
+        bytes[bufsize-1] = 0xfd;
+        bytes[bufsize-2] = 0xfe;
+        bytes[bufsize-3] = 0xff;
+
+        for(int i = 0; i < litleds; i++)
+        {
+            if(i < ((num_avail_leds) / 2))
+            {
+                //green
+                bytes[11 + ((i + startled - 1) * 3) + 1] = 0xff;
+            }
+            else
+            {
+                if(i < num_avail_leds - 1)
+                {
+                    //yellow
+                    bytes[11 + ((i + startled - 1) * 3) + 0] = 0xff;
+                    bytes[11 + ((i + startled - 1) * 3) + 1] = 0xff;
+                }
+            }
+            if(i == num_avail_leds - 1)
+            {
+                //red
+                bytes[11 + ((i + startled - 1) * 3) + 0] = 0xff;
+            }
+        }
+    }
+
+    slogt("Updating arduino device lights to %i", litleds);
+    // we can add configs to set all the colors
+    size_t size = sizeof(bytes);
+
+    arduino_update(serialdevice, &bytes, size);
+    return result;
+}
+
 int arduino_simwind_update(SimDevice* this, SimData* simdata)
 {
     SerialDevice* serialdevice = (void *) this->derived;
@@ -201,6 +286,7 @@ int serialdev_init(SerialDevice* serialdevice, DeviceSettings* ds)
 
 static const vtable serial_simdevice_vtable = { &serialdev_update, &serialdev_free };
 static const vtable arduino_shiftlights_vtable = { &arduino_shiftlights_update, &serialdev_free };
+static const vtable arduino_simled_vtable = { &arduino_simled_update, &serialdev_free };
 static const vtable arduino_simwind_vtable = { &arduino_simwind_update, &serialdev_free };
 static const vtable arduino_simhaptic_vtable = { &arduino_simhaptic_update, &serialdev_free };
 static const vtable serialwheel_vtable = { &serial_wheel_update, &serial_wheel_free };
@@ -223,6 +309,14 @@ SerialDevice* new_serial_device(DeviceSettings* ds, MonocoqueSettings* ms) {
             this->m.vtable = &arduino_shiftlights_vtable;
             slogi("Initializing arduino device for shiftlights.");
             break;
+        case (SIMDEVTYPE_SIMLED):
+            this->devicetype = ARDUINODEV__SIMLED;
+            this->numleds = ds->serialdevsettings.numleds;
+            this->startled = ds->serialdevsettings.startled;
+            this->endled = ds->serialdevsettings.endled;
+            this->m.vtable = &arduino_simled_vtable;
+            slogi("Initializing arduino device for simled.");
+            break;
         case (SIMDEVTYPE_SIMWIND):
             this->devicetype = ARDUINODEV__SIMWIND;
             this->m.vtable = &arduino_simwind_vtable;
diff --git a/src/monocoque/devices/serialdevice.h b/src/monocoque/devices/serialdevice.h
index af7cbe1..7137bfd 100644
--- a/src/monocoque/devices/serialdevice.h
+++ b/src/monocoque/devices/serialdevice.h
@@ -10,6 +10,7 @@ typedef enum
     ARDUINODEV__SIMWIND       = 1,
     ARDUINODEV__HAPTIC        = 2,
     SERIALDEV__MOZAR5         = 3,
+    ARDUINODEV__SIMLED        = 4
 }
 SerialDeviceType;
 
diff --git a/src/monocoque/devices/simdevice.h b/src/monocoque/devices/simdevice.h
index 017a60b..6019f94 100644
--- a/src/monocoque/devices/simdevice.h
+++ b/src/monocoque/devices/simdevice.h
@@ -53,6 +53,9 @@ typedef struct
     // move these two they only apply to the haptic device
     int motorsposition;
     int numlights;
+    int numleds;
+    int startled;
+    int endled;
     int baudrate;
     double ampfactor;
     double state;
diff --git a/src/monocoque/helper/confighelper.c b/src/monocoque/helper/confighelper.c
index d0424cb..7d37df8 100644
--- a/src/monocoque/helper/confighelper.c
+++ b/src/monocoque/helper/confighelper.c
@@ -145,6 +145,11 @@ int strtodevsubtype(const char* device_subtype, DeviceSettings* ds, int simdev)
                 ds->dev_subtype = SIMDEVTYPE_SHIFTLIGHTS;
                 break;
             }
+            if (strcicmp(device_subtype, "Simleds") == 0)
+            {
+                ds->dev_subtype = SIMDEVTYPE_SIMLED;
+                break;
+            }
             if (strcicmp(device_subtype, "SimWind") == 0)
             {
                 ds->dev_subtype = SIMDEVTYPE_SIMWIND;
@@ -748,6 +753,18 @@ int devsetup(const char* device_type, const char* device_subtype, const char* co
             config_setting_lookup_int(device_settings, "numlights", &numlights);
             ds->serialdevsettings.numlights = numlights;
 
+            int numleds = 6;
+            config_setting_lookup_int(device_settings, "numleds", &numleds);
+            ds->serialdevsettings.numleds = numleds;
+
+            int startled = 1;
+            config_setting_lookup_int(device_settings, "startled", &startled);
+            ds->serialdevsettings.startled = startled;
+
+            int endled = 1;
+            config_setting_lookup_int(device_settings, "endled", &endled);
+            ds->serialdevsettings.endled = endled;
+
             int baud = 9600;
             config_setting_lookup_int(device_settings, "baud", &baud);
             ds->serialdevsettings.baud = baud;
@@ -827,7 +844,7 @@ int uiloadconfig(const char* config_file_str, int confignum, int configureddevic
 int settingsfree(DeviceSettings ds)
 {
 
-    if (ds.dev_subtype == SIMDEVTYPE_SIMWIND || ds.dev_subtype == SIMDEVTYPE_SHIFTLIGHTS)
+    if (ds.dev_subtype == SIMDEVTYPE_SIMWIND || ds.dev_subtype == SIMDEVTYPE_SHIFTLIGHTS || ds.dev_subtype == SIMDEVTYPE_SIMLED)
     {
         if (ds.serialdevsettings.portdev != NULL)
         {
diff --git a/src/monocoque/helper/confighelper.h b/src/monocoque/helper/confighelper.h
index 22cf3f2..214d8bc 100644
--- a/src/monocoque/helper/confighelper.h
+++ b/src/monocoque/helper/confighelper.h
@@ -29,7 +29,8 @@ typedef enum
     SIMDEVTYPE_SIMWIND           = 4,
     SIMDEVTYPE_SERIALHAPTIC      = 5,
     SIMDEVTYPE_USBWHEEL          = 6,
-    SIMDEVTYPE_SERIALWHEEL       = 7
+    SIMDEVTYPE_SERIALWHEEL       = 7,
+    SIMDEVTYPE_SIMLED            = 8
 }
 DeviceSubType;
 
@@ -155,6 +156,9 @@ typedef struct
     char* portdev;
     MotorPosition motorsposition;
     int numlights;
+    int numleds;
+    int startled;
+    int endled;
     float ampfactor;
     int baud;
 }
diff --git a/tests/simlighttest.c b/tests/simlighttest.c
index 7532a46..7d09b3b 100644
--- a/tests/simlighttest.c
+++ b/tests/simlighttest.c
@@ -10,7 +10,7 @@ int check(enum sp_return result);
 int main()
 {
 
-    char* port_name = "/dev/ttyACM0";
+    char* port_name = "/dev/simdev0";
 
     /* The ports we will use. */
     struct sp_port* port;
@@ -31,25 +31,79 @@ int main()
 
     ShiftLightsData sd;
 
-    int numlights = 7;
-    size_t bufsize = (numlights * 3) + 9;
-    char bytes[bufsize];
 
+
+    size_t bufsize1 = 11;
+    size_t recv_bufsize1 = 5;
+    char recv_buf1[recv_bufsize1];
+    char bytes1[bufsize1];
+
+    for(int j = 0; j < bufsize1; j++)
+    {
+        bytes1[j] = 0x00;
+    }
+    bytes1[0] = 0xff;
+    bytes1[1] = 0xff;
+    bytes1[2] = 0xff;
+    bytes1[3] = 0xff;
+    bytes1[4] = 0xff;
+    bytes1[5] = 0xff;
+    bytes1[6] = 0x6c;
+    bytes1[7] = 0x65;
+    bytes1[8] = 0x64;
+    bytes1[9] = 0x73;
+    bytes1[10] = 0x63;
+
+    int result = 0;
+    unsigned int timeout = 2000;
+    result = check(sp_blocking_write(port, &bytes1, bufsize1, timeout));
+    result = check(sp_blocking_read(port, &recv_buf1, recv_bufsize1, timeout));
+
+    char numstr[4];
+    for(int j = 0; j < 4; j++)
+    {
+        numstr[j] = '\0';
+    }
+    for(int j = 0; j < recv_bufsize1; j++)
+    {
+        if(recv_buf1[j] != 0 && recv_buf1[j] != 0x0d && recv_buf1[j] != 0x0a)
+        {
+            numstr[j] = recv_buf1[j];
+        }
+    }
+    int numlights = atoi(numstr);
+    printf("numlights is %i\n", numlights);
+    //printf("%x\n", recv_buf[0]);
+    //printf("%x\n", recv_buf[1]);
+    //printf("%x\n", recv_buf[2]);
+    //printf("%x\n", recv_buf[3]);
+    //printf("%x\n", recv_buf[4]);
+
+    size_t bufsize = (numlights * 3) + 14;
+    char bytes[bufsize];
+    for(int j = 0; j < bufsize; j++)
+    {
+        bytes[j] = 0x00;
+    }
     bytes[0] = 0xff;
     bytes[1] = 0xff;
     bytes[2] = 0xff;
     bytes[3] = 0xff;
     bytes[4] = 0xff;
     bytes[5] = 0xff;
+    bytes[6] = 0x73;
+    bytes[7] = 0x6c;
+    bytes[8] = 0x65;
+    bytes[9] = 0x64;
+    bytes[10] = 0x73;
     bytes[bufsize-1] = 0xfd;
     bytes[bufsize-2] = 0xfe;
     bytes[bufsize-3] = 0xff;
 
-    int result;
-    unsigned int timeout = 2000;
-    for( int i = 0; i < 7; i++)
+
+    for( int i = 0; i < numlights; i++)
     {
-        bytes[(i * 3) + 6 + 1] = 0xff;
+        bytes[(i * 3) + 11 + 1] = 0xff;
 
         /* Send data. */
         result = check(sp_blocking_write(port, &bytes, bufsize, timeout));
@@ -67,7 +121,10 @@ int main()
 
         sleep(2);
     }
-    sd.litleds = 0;
+    for( int i = 0; i < numlights; i++)
+    {
+        bytes[(i * 3) + 11 + 1] = 0x00;
+    }
     result = check(sp_blocking_write(port, &bytes, bufsize, timeout));
 
     check(sp_close(port));