esptest.ino

//wifi test

#include <ErriezSerialTerminal.h>
#include <WiFi.h>
#include <ModbusMaster.h>

// LED pin
#define LED_PIN     LED_BUILTIN

// Newline character '\r' or '\n'
char newlineChar = '\n';
// Separator character between commands and arguments
char delimiterChar = ' ';

// instantiate ModbusMaster object
ModbusMaster node;

String ssidList;

// const char* ssid     = "your-ssid"; // Change this to your WiFi SSID
// const char* password = "your-password"; // Change this to your WiFi password

// digital output
#define DO1 32
#define DO2 33

// digital input
#define DI1 18 // AC OK = 18
#define DI2 19 // Battery Low = 19
#define DI3 25 // isolate input D25
#define DI4 26 // isolate input D26

// #define DI1 32// AC OK = 18
// #define DI2 33 // Battery Low = 19
// #define DI3 4 // isolate input D25
// #define DI4 5 // isolate input D26

//rs 485
// Rx = 16    //485+
// Tx = 17    //485-
// Direction = 15

//rs 485
#define MODBUS_RX_PIN 16
#define MODBUS_TX_PIN 17
#define MODBUS_DE_PIN 15
#define MODBUS_SERIAL_BAUD 9600

// Create serial terminal object
SerialTerminal term(newlineChar, delimiterChar);

// Function prototypes
void unknownCommand(const char *command);
void cmdHelp();
void cmdLedOn();
void cmdLedOff();
void cmdReadPin();
void cmdWifiList();
void cmdDeviceFactoryReset();
void cmdReadModbus();

void setup() {
// Initialize serial port
  pinMode(MODBUS_RX_PIN, OUTPUT);
  pinMode(MODBUS_DE_PIN, OUTPUT);
  // Init in receive mode
  digitalWrite(MODBUS_RX_PIN, 0);
  digitalWrite(MODBUS_DE_PIN, 0);

  Serial.begin(115200);  
  Serial2.begin(MODBUS_SERIAL_BAUD, SERIAL_8N1, MODBUS_RX_PIN, MODBUS_TX_PIN);
  // Serial.setRxBufferSize(128);

  // communicate with Modbus slave ID 2 over Serial (port 0)
  node.begin(1, Serial2);
  node.preTransmission(preTransmission);
  node.postTransmission(postTransmission);
  delay(10);

  // Serial.println(F("\nSerial terminal example."));
  Serial.println(F("Type 'help' to display usage."));
  
  // Initialize the built-in LED
  pinMode(DO1, OUTPUT);
  pinMode(DO2, OUTPUT);
    
  pinMode(DI1,INPUT_PULLUP);
  pinMode(DI2,INPUT_PULLUP);
  pinMode(DI3,INPUT_PULLUP);
  pinMode(DI4,INPUT_PULLUP);

  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, LOW);
  
  // Set default handler for unknown commands
  term.setDefaultHandler(unknownCommand);

  // Add command callback handlers
  term.addCommand("?", cmdHelp);
  term.addCommand("help", cmdHelp);
  term.addCommand("on", cmdLedOn);
  term.addCommand("off", cmdLedOff);
  term.addCommand("read", cmdReadPin);
  term.addCommand("mod",  cmdReadModbus);
  // wifi
  term.addCommand("list", cmdWifiList);
  
  term.addCommand("reset", cmdDeviceFactoryReset);
      
}

void loop()
{
    term.readSerial();
}

void preTransmission() {
  digitalWrite(MODBUS_RX_PIN, 1);
  digitalWrite(MODBUS_DE_PIN, 1);
}
 
void postTransmission() {
  digitalWrite(MODBUS_RX_PIN, 0);
  digitalWrite(MODBUS_DE_PIN, 0);
}

void unknownCommand(const char *command)
{
    // Print unknown command
    Serial.print(F("Unknown command: "));
    Serial.println(command);
}

void cmdHelp()
{
    // Print usage
    Serial.println(F("Serial terminal usage:"));
    Serial.println(F("  help or ?          Print this usage"));
    Serial.println(F("  on                 Turn DO on"));
    Serial.println(F("  off                Turn DO off"));
    Serial.println(F("  read               read digital input"));
    Serial.println(F("  list               wifi scan"));

}

//////////////////////////////////////
void cmdWifiList() {

    // WiFi.mode(WIFI_MODE_STA);
    WiFi.disconnect();
    delay(100);

    int n = WiFi.scanNetworks();
    delay(10);
    ssidList = WiFi.SSID(0);
    for (int i = 1; i < n; ++i) {
      ssidList += "\n\r";
      ssidList += WiFi.SSID(i);      
    }
    delay(10);
    Serial.println("Wifi Scan");
    Serial.println(ssidList);
    Serial.println();
}

void cmdDeviceFactoryReset() {
    // reset the wifi config
    delay(3000);
    ESP.restart();
}

void cmdReadModbus() {
    int result;

    Serial.println("Modbus Temperature");
    result = node.readInputRegisters(1, 1);
    if (result == node.ku8MBSuccess) {
      for (int j = 0; j < 1; j++) {
        Serial.print( node.getResponseBuffer(j) );
      }
    }

    Serial.print(",");
    
    result = node.readInputRegisters(2, 1);
    if (result == node.ku8MBSuccess) {
      for (int j = 0; j < 1; j++) {
        Serial.println ( node.getResponseBuffer(j) );
      }
    }

}

//////////////////////////////////////
void cmdLedOn()
{
    // Turn LED on
    Serial.println(F("Turn on"));
    digitalWrite(LED_PIN, HIGH);
    
    digitalWrite(DO1, HIGH);
    digitalWrite(DO2, HIGH);
    
}

void cmdLedOff()
{
    // Turn LED off
    Serial.println(F("Turn off"));
    digitalWrite(LED_PIN, LOW);

    digitalWrite(DO1, LOW);
    digitalWrite(DO2, LOW);
}

void cmdReadPin()
{
    // read di
    Serial.println("Digital Read");
    Serial.print("AC_OK :");
    Serial.println( digitalRead(DI1) );
    Serial.print("Batt_Low :");
    Serial.println ( digitalRead(DI2) );
    Serial.print("D25 :");
    Serial.println ( digitalRead(DI3) );
    Serial.print("D26 :");
    Serial.println ( digitalRead(DI4) );
        
}