1 files changed, 54 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/StartekProtocolEncoder.java b/src/main/java/org/traccar/protocol/StartekProtocolEncoder.java
new file mode 100644
index 000000000..a96502f11
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/StartekProtocolEncoder.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2021 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import io.netty.channel.Channel;
+import org.traccar.Protocol;
+import org.traccar.StringProtocolEncoder;
+import org.traccar.helper.Checksum;
+import org.traccar.model.Command;
+
+public class StartekProtocolEncoder extends StringProtocolEncoder {
+
+    public StartekProtocolEncoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected String formatCommand(Command command, String format, String... keys) {
+        String uniqueId = getUniqueId(command.getDeviceId());
+        String payload = super.formatCommand(command, format, keys);
+        int length = uniqueId.length() + 1 + payload.length();
+        String sentence = "$$:" + length + "," + uniqueId + "," + payload;
+        return sentence + Checksum.sum(sentence) + "\r\n";
+    }
+
+    @Override
+    protected Object encodeCommand(Channel channel, Command command) {
+
+        switch (command.getType()) {
+            case Command.TYPE_OUTPUT_CONTROL:
+                return formatCommand(command, "900,%s,%s", Command.KEY_INDEX, Command.KEY_DATA);
+            case Command.TYPE_ENGINE_STOP:
+                return formatCommand(command, "900,1,1");
+            case Command.TYPE_ENGINE_RESUME:
+                return formatCommand(command, "900,1,0");
+            default:
+                return null;
+        }
+    }
+
+}