Prototype

Author: kasparsd

projects/dashboard/.gitignore

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+/node_modules/

projects/dashboard/index.js

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+const ModbusRTU = require('modbus-serial');
+const client = new ModbusRTU();
+
+const toUint16 = (string) => new Uint16Array(new TextEncoder('utf-8').encode(string));
+
+const wifiCredentials = {
+    ssid: 'YOURSSID',
+    password: 'YOURPASSWORD'
+};
+
+client.connectRTUBuffered(
+    '/dev/tty.usbserial-1410', 
+    { 
+        baudRate: 9600 
+    }
+).then( async () => {
+    client.setID(1);
+
+    await client.writeRegisters(30, toUint16(wifiCredentials.ssid))
+        .then(() => {
+            return client.readHoldingRegisters(30, 20)
+                .then(val => {
+                    console.log( 'got', val.buffer.toString() )
+                });
+        });
+    
+    await client.writeRegisters(10, toUint16(wifiCredentials.password))
+        .then(() => {
+            return client.readHoldingRegisters(10, 20)
+                .then(val => {
+                    console.log( 'got', val.buffer.toString() )
+                });
+        });
+
+    return client.writeCoil(10, true).then( r => console.log(r) );
+} ).catch( err => console.error( err ) );