diff --git a/gen/pb/api.pb.go b/gen/pb/api.pb.go
index 94e3ccb..c0c14a0 100644
--- a/gen/pb/api.pb.go
+++ b/gen/pb/api.pb.go
@@ -42,7 +42,7 @@ var file_api_proto_rawDesc = []byte{
 	0x2f, 0x6d, 0x69, 0x6e, 0x69, 0x73, 0x68, 0x31, 0x34, 0x34, 0x1a, 0x16, 0x76, 0x61, 0x72, 0x6c,
 	0x61, 0x6d, 0x6f, 0x77, 0x2e, 0x63, 0x6f, 0x6c, 0x40, 0x79, 0x61, 0x68, 0x6f, 0x6f, 0x2e, 0x63,
 	0x6f, 0x6d, 0x32, 0x03, 0x31, 0x2e, 0x30, 0x1a, 0x0e, 0x6c, 0x6f, 0x63, 0x61, 0x6c, 0x68, 0x6f,
-	0x73, 0x74, 0x3a, 0x33, 0x30, 0x31, 0x30, 0x2a, 0x02, 0x01, 0x02, 0x32, 0x10, 0x61, 0x70, 0x70,
+	0x73, 0x74, 0x3a, 0x33, 0x32, 0x30, 0x31, 0x2a, 0x02, 0x01, 0x02, 0x32, 0x10, 0x61, 0x70, 0x70,
 	0x6c, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2f, 0x6a, 0x73, 0x6f, 0x6e, 0x3a, 0x10, 0x61,
 	0x70, 0x70, 0x6c, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2f, 0x6a, 0x73, 0x6f, 0x6e, 0x62,
 	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
diff --git a/gen/pb/common.pb.go b/gen/pb/common.pb.go
index 1313769..caa221d 100644
--- a/gen/pb/common.pb.go
+++ b/gen/pb/common.pb.go
@@ -186,15 +186,15 @@ var file_common_proto_rawDesc = []byte{
 	0x6f, 0x6d, 0x2f, 0x65, 0x6e, 0x76, 0x6f, 0x79, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2f, 0x70, 0x72,
 	0x6f, 0x74, 0x6f, 0x63, 0x2d, 0x67, 0x65, 0x6e, 0x2d, 0x76, 0x61, 0x6c, 0x69, 0x64, 0x61, 0x74,
 	0x65, 0x2f, 0x76, 0x61, 0x6c, 0x69, 0x64, 0x61, 0x74, 0x65, 0x2f, 0x76, 0x61, 0x6c, 0x69, 0x64,
-	0x61, 0x74, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x5e, 0x0a, 0x07, 0x4d, 0x65, 0x73,
+	0x61, 0x74, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x6b, 0x0a, 0x07, 0x4d, 0x65, 0x73,
 	0x73, 0x61, 0x67, 0x65, 0x12, 0x39, 0x0a, 0x05, 0x70, 0x68, 0x6f, 0x6e, 0x65, 0x18, 0x01, 0x20,
 	0x01, 0x28, 0x09, 0x42, 0x23, 0xfa, 0x42, 0x20, 0x72, 0x1e, 0x32, 0x1c, 0x5e, 0x5c, 0x2b, 0x28,
 	0x3f, 0x3a, 0x5b, 0x30, 0x2d, 0x39, 0x5d, 0xe2, 0x97, 0x8f, 0x3f, 0x29, 0x7b, 0x36, 0x2c, 0x31,
 	0x34, 0x7d, 0x5b, 0x30, 0x2d, 0x39, 0x5d, 0x24, 0x52, 0x05, 0x70, 0x68, 0x6f, 0x6e, 0x65, 0x12,
-	0x18, 0x0a, 0x07, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09,
-	0x52, 0x07, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x42, 0x08, 0x5a, 0x06, 0x67, 0x65, 0x6e,
-	0x2f, 0x70, 0x62, 0x50, 0x00, 0x50, 0x01, 0x50, 0x02, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f,
-	0x33,
+	0x25, 0x0a, 0x07, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09,
+	0x42, 0x0b, 0xfa, 0x42, 0x08, 0x72, 0x06, 0x18, 0xa0, 0x01, 0xd0, 0x01, 0x01, 0x52, 0x07, 0x6d,
+	0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x42, 0x08, 0x5a, 0x06, 0x67, 0x65, 0x6e, 0x2f, 0x70, 0x62,
+	0x50, 0x00, 0x50, 0x01, 0x50, 0x02, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/gen/pb/common.pb.validate.go b/gen/pb/common.pb.validate.go
index 130f36e..cbb2ef8 100644
--- a/gen/pb/common.pb.validate.go
+++ b/gen/pb/common.pb.validate.go
@@ -67,7 +67,20 @@ func (m *Message) validate(all bool) error {
 		errors = append(errors, err)
 	}
 
-	// no validation rules for Message
+	if m.GetMessage() != "" {
+
+		if utf8.RuneCountInString(m.GetMessage()) > 160 {
+			err := MessageValidationError{
+				field:  "Message",
+				reason: "value length must be at most 160 runes",
+			}
+			if !all {
+				return err
+			}
+			errors = append(errors, err)
+		}
+
+	}
 
 	if len(errors) > 0 {
 		return MessageMultiError(errors)
diff --git a/gen/swagger/api.swagger.json b/gen/swagger/api.swagger.json
index 46dfc32..65fd552 100644
--- a/gen/swagger/api.swagger.json
+++ b/gen/swagger/api.swagger.json
@@ -9,7 +9,7 @@
       "email": "varlamow.col@yahoo.com"
     }
   },
-  "host": "localhost:3010",
+  "host": "localhost:3201",
   "schemes": [
     "http",
     "https"
diff --git a/modules/controllers/messages/handlers.go b/modules/controllers/messages/handlers.go
new file mode 100644
index 0000000..70feb58
--- /dev/null
+++ b/modules/controllers/messages/handlers.go
@@ -0,0 +1,38 @@
+package messages
+
+import (
+	"context"
+
+	"github.com/minish144/go-sms-api/gen/pb"
+	"github.com/minish144/go-sms-api/modules/modem"
+	"github.com/sirupsen/logrus"
+	"github.com/spf13/viper"
+)
+
+func Send(ctx context.Context, in *pb.Messages_SendRequest) (*pb.Messages_SendResponse, error) {
+	if err := in.Validate(); err != nil {
+		return nil, err
+	}
+
+	comport := viper.GetString("modem.comport")
+	baudrate := viper.GetInt("modem.baudrate")
+	newModem := modem.New(comport, baudrate)
+
+	if err := newModem.Send(in.Message.Phone, in.Message.Message); err != nil {
+		logrus.WithFields(
+			logrus.Fields{
+				"error": err.Error(),
+			},
+		).Errorln("failed to send sms")
+		return nil, err
+	}
+
+	logrus.WithFields(
+		logrus.Fields{
+			"phone":   in.Message.Phone,
+			"message": in.Message.Message,
+		},
+	).Infoln("sms was sent successfully")
+
+	return &pb.Messages_SendResponse{}, nil
+}
diff --git a/modules/server/server.go b/modules/server/server.go
index 642403e..0e3a30f 100644
--- a/modules/server/server.go
+++ b/modules/server/server.go
@@ -88,7 +88,7 @@ func Run() {
 
 	mux.HandleFunc("/swagger.json", serveSwagger)
 
-	logrus.Infoln("serving gRPC-Gateway on " + httpConnectionString)
+	logrus.Infoln("serving HTTP gRPC-Gateway on " + httpConnectionString)
 	if err := http.ListenAndServe(httpConnectionString, allowCORS(mux)); err != nil {
 		logrus.WithFields(logrus.Fields{
 			"error": err.Error(),
diff --git a/modules/server/structs.go b/modules/server/structs.go
index 578ac33..5318390 100644
--- a/modules/server/structs.go
+++ b/modules/server/structs.go
@@ -4,6 +4,7 @@ import (
 	"context"
 
 	"github.com/minish144/go-sms-api/gen/pb"
+	"github.com/minish144/go-sms-api/modules/controllers/messages"
 )
 
 type ApiServiceServer struct {
@@ -11,5 +12,5 @@ type ApiServiceServer struct {
 }
 
 func (s *ApiServiceServer) SendMessage(ctx context.Context, in *pb.Messages_SendRequest) (*pb.Messages_SendResponse, error) {
-	return nil, nil
+	return messages.Send(ctx, in)
 }
diff --git a/proto/api.proto b/proto/api.proto
index 564970a..c6c3cf0 100644
--- a/proto/api.proto
+++ b/proto/api.proto
@@ -18,7 +18,7 @@ option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_swagger) = {
             email: "varlamow.col@yahoo.com"
         };
     };
-    host: "localhost:3010",
+    host: "localhost:3201",
     schemes: [HTTP, HTTPS]
     consumes: "application/json"
     produces: "application/json"
diff --git a/proto/common.proto b/proto/common.proto
index 795cd24..f299e29 100644
--- a/proto/common.proto
+++ b/proto/common.proto
@@ -10,5 +10,5 @@ import public "github.com/envoyproxy/protoc-gen-validate/validate/validate.proto
 
 message Message {
     string phone = 1 [(validate.rules).string = { pattern: "^\\+(?:[0-9]●?){6,14}[0-9]$" }];
-    string message = 2;
+    string message = 2 [(validate.rules).string = { ignore_empty: true, max_len: 160 }];
 }
\ No newline at end of file