Initial commit

test/test.js

@@ -0,0 +1,20 @@
+// 'RIR' contains the "Function Code" that we are going to invoke on the remote device
+var FC = require('modbus-stack').FUNCTION_CODES;
+
+// IP and port of the MODBUS slave, default port is 502
+var client = require('modbus-stack/client').createClient(502, 'localhost');
+
+// 'req' is an instance of the low-level `ModbusRequestStack` class
+var req = client.request(FC.READ_INPUT_REGISTERS, // Function Code: 4
+    0,   // Start at address 0
+    50)  // Read 50 contiguous registers from 0
+    .on('error', function (err) {
+       console.error(err);
+    });
+
+// 'response' is emitted after the entire contents of the response has been received.
+req.on('response', function(registers) {
+    // An Array of length 50 filled with Numbers of the current registers.
+    console.log(registers);
+    client.end();
+});