107 lines
2.9 KiB
Arduino
107 lines
2.9 KiB
Arduino
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/*
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WiFi Modbus TCP Client Toggle
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This sketch toggles the coil of a Modbus TCP server connected
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on and off every second.
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Circuit:
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- MKR1000 or MKR WiFi 1010 board
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created 16 July 2018
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by Sandeep Mistry
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*/
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#include <SPI.h>
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#include <WiFiNINA.h> // for MKR WiFi 1010
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// #include <WiFi101.h> // for MKR1000
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#include <ArduinoRS485.h> // ArduinoModbus depends on the ArduinoRS485 library
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#include <ArduinoModbus.h>
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#include "arduino_secrets.h"
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///////please enter your sensitive data in the Secret tab/arduino_secrets.h
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char ssid[] = SECRET_SSID; // your network SSID (name)
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char pass[] = SECRET_PASS; // your network password (use for WPA, or use as key for WEP)
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int keyIndex = 0; // your network key Index number (needed only for WEP)
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int status = WL_IDLE_STATUS;
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WiFiClient wifiClient;
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ModbusTCPClient modbusTCPClient(wifiClient);
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IPAddress server(192, 168, 1, 10); // update with the IP Address of your Modbus server
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void setup() {
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//Initialize serial and wait for port to open:
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Serial.begin(9600);
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while (!Serial) {
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; // wait for serial port to connect. Needed for native USB port only
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}
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Serial.println("Modbus TCP Client Toggle");
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// attempt to connect to WiFi network:
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while (status != WL_CONNECTED) {
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Serial.print("Attempting to connect to SSID: ");
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Serial.println(ssid);
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// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
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status = WiFi.begin(ssid, pass);
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// wait 10 seconds for connection:
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delay(10000);
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}
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// you're connected now, so print out the status:
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printWifiStatus();
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}
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void loop() {
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if (!modbusTCPClient.connected()) {
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// client not connected, start the Modbus TCP client
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Serial.println("Attempting to connect to Modbus TCP server");
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if (!modbusTCPClient.begin(server)) {
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Serial.println("Modbus TCP Client failed to connect!");
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} else {
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Serial.println("Modbus TCP Client connected");
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}
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} else {
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// client connected
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// write the value of 0x01, to the coil at address 0x00
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if (!modbusTCPClient.coilWrite(0x00, 0x01)) {
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Serial.print("Failed to write coil! ");
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Serial.println(modbusTCPClient.lastError());
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}
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// wait for 1 second
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delay(1000);
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// write the value of 0x00, to the coil at address 0x00
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if (!modbusTCPClient.coilWrite(0x00, 0x00)) {
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Serial.print("Failed to write coil! ");
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Serial.println(modbusTCPClient.lastError());
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}
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// wait for 1 second
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delay(1000);
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}
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}
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void printWifiStatus() {
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// print the SSID of the network you're attached to:
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Serial.print("SSID: ");
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Serial.println(WiFi.SSID());
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// print your WiFi shield's IP address:
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IPAddress ip = WiFi.localIP();
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Serial.print("IP Address: ");
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Serial.println(ip);
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// print the received signal strength:
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long rssi = WiFi.RSSI();
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Serial.print("signal strength (RSSI):");
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Serial.print(rssi);
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Serial.println(" dBm");
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}
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