Update examples

Author: emelianov

README.md

@@ -71,15 +71,15 @@ http://www.modbus.org/docs/Modbus_over_serial_line_V1_02.pdf
 + added ability to auto connect to slave. Setting is global. Disabled by default.
 // 2.0.1
 + Fix readCoil\Hreg\Ists\Ireg not read value from slave
-+ Fix cresh on disconnect with Arduino Core 2.5.x
++ Fix crash on disconnect with Arduino Core 2.5.x
 // 2.1.0
-+ Fix slave error response on write multiple Hreg\Coils
++ Fix slave error response on write multiple Hregs\Coils
 + Fix writeCoil() for multiple coils
 + dropTransactions()
 + disconnect()
 + ~ModbusIP()
 + task() cleanup
-- Modify examples
++ Modify examples
 // 2.2.0
 - code cleanup
 - Implement Private Reg/Coil

examples/AnalogInput/AnalogInput.ino

@@ -43,7 +43,7 @@ void setup() {
     Serial.println("IP address: ");
     Serial.println(WiFi.localIP());
 
-    mb.begin();		//Start Modbus IP
+    mb.slave();		//Start Modbus IP
     // Add SENSOR_IREG register - Use addIreg() for analog Inputs
     mb.addIreg(SENSOR_IREG);
 
@@ -60,5 +60,5 @@ void loop() {
        //Setting raw value (0-1024)
        mb.Ireg(SENSOR_IREG, analogRead(A0));
    }
-   delay(100);
+   delay(10);
 }

examples/Callback/Callback.ino

@@ -60,7 +60,7 @@ void setup() {
   Serial.println(WiFi.localIP());
 
   mb.onConnect(cbConn);   // Add callback on connection event
-  mb.begin();
+  mb.slave();
 
   pinMode(ledPin, OUTPUT);
   mb.addCoil(LED_COIL);       // Add Coil. The same as mb.addCoil(COIL_BASE, false, LEN)
@@ -70,5 +70,5 @@ void setup() {
 void loop() {
    //Call once inside loop() - all magic here
    mb.task();
-   delay(100);
+   delay(10);
 }

examples/HoldingReg/HoldingReg.ino

@@ -44,12 +44,12 @@ void setup() {
   Serial.println("IP address: ");
   Serial.println(WiFi.localIP());
 
-  mb.begin();
+  mb.slave();
   mb.addHreg(TEST_HREG, 0xABCD);
 }
 
 void loop() {
    //Call once inside loop() - all magic here
    mb.task();
-   delay(100);
+   delay(10);
 }

examples/Led/Led.ino

@@ -44,7 +44,7 @@ void setup() {
   Serial.println("IP address: ");
   Serial.println(WiFi.localIP());
 
-  mb.begin();
+  mb.slave();
 
   pinMode(ledPin, OUTPUT);
   mb.addCoil(LED_COIL);
@@ -56,5 +56,5 @@ void loop() {
 
    //Attach ledPin to LED_COIL register
    digitalWrite(ledPin, mb.Coil(LED_COIL));
-   delay(100);
+   delay(10);
 }

examples/MassOperations/MassOperations.ino

@@ -69,7 +69,7 @@ void setup() {
   for (uint8_t i = 0; i < LEN; i++)
     pinMode(pinList[i], INPUT);
   mb.onConnect(cbConn);   // Add callback on connection event
-  mb.begin();
+  mb.slave();
 
   mb.addCoil(COIL_BASE, COIL_VAL(false), LEN); // Add Coils.
   mb.onGetCoil(COIL_BASE, cbRead, LEN); // Add callback on Coils value get
@@ -79,5 +79,5 @@ void setup() {
 void loop() {
    //Call once inside loop() - all magic here
    mb.task();
-   delay(100);
+   delay(10);
 }

examples/Master/Master.ino

@@ -71,5 +71,5 @@ void loop() {
     mb.connect(remote);           // Try to connect if no connection
   }
   mb.task();                      // Common local Modbus task
-  delay(100);                     // Polling interval
+  delay(10);                     // Polling interval
 }

examples/MasterSimpleRead/MasterSimpleRead.ino

@@ -52,7 +52,7 @@ void loop() {
   }
   mb.task();                      // Common local Modbus task
   delay(100);                     // Pulling interval
-  if (show--) {                   // Display Slave register value one time per second (with default settings)
+  if (!show--) {                   // Display Slave register value one time per second (with default settings)
     Serial.println(res);
     show = LOOP_COUNT;
   }

examples/MasterWriteMultiple/MasterWriteMultiple.ino

@@ -0,0 +1,65 @@
+/*
+  Modbus-Arduino Example - Master (Modbus IP ESP8266/ESP32)
+  Write multiple coils to Slave device
+
+  (c)2019 Alexander Emelianov ([email protected])
+  https://github.com/emelianov/modbus-esp8266
+*/
+
+#ifdef ESP8266
+ #include <ESP8266WiFi.h>
+#else
+ #include <WiFi.h>
+#endif
+#include <ModbusIP_ESP8266.h>
+
+const int REG = 100;                    // Modbus Coils Offset
+const int COUNT = 5;                    // Count of Coils
+IPAddress remote(192, 168, 20, 102);    // Address of Modbus Slave device
+
+ModbusIP mb;  // ModbusIP object
+
+void setup() {
+ #ifdef ESP8266
+  Serial.begin(74880);
+ #else
+  Serial.begin(115200);
+ #endif
+ 
+  WiFi.begin();
+  
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+ 
+  Serial.println("");
+  Serial.println("WiFi connected");  
+  Serial.println("IP address: ");
+  Serial.println(WiFi.localIP());
+
+  mb.master();
+}
+
+bool cb(Modbus::ResultCode event, uint16_t transactionId, void* data) { // Modbus Transaction callback
+  if (event != Modbus::EX_SUCCESS)                  // If transaction got an error
+    Serial.printf("Modbus result: %02X\n", event);  // Display Modbus error code
+  if (event == Modbus::EX_TIMEOUT) {    // If Transaction timeout took place
+    mb.disconnect(remote);              // Close connection to slave and
+    mb.dropTransactions();              // Cancel all waiting transactions
+  }
+  return true;
+}
+
+bool res[COUNT] = {false, true, false, true, true};
+
+void loop() {
+    if (!mb.isConnected(remote)) {   // Check if connection to Modbus Slave is established
+        mb.connect(remote);           // Try to connect if no connection
+        Serial.print(".");
+    }
+    if (!mb.writeCoil(remote, REG, res, COUNT, cb)) // Try to Write array of COUNT of Coils to Modbus Slave
+        Serial.print("#");  
+    mb.task(); // Modbus task
+    delay(50); // Pushing interval
+}

examples/MultipleHRegDebug/MultipleHRegDebug.ino

@@ -69,7 +69,7 @@ void setup() {
   Serial.println(WiFi.localIP());
 
   mb.onConnect(cbConn);   // Add callback on connection event
-  mb.begin();
+  mb.slave();
 
   if (!mb.addHreg(0, 0xF0F0, LEN)) Serial.println("Error"); // Add Hregs
   mb.onGetHreg(0, cbRead, LEN); // Add callback on Coils value get
@@ -79,5 +79,5 @@ void setup() {
 void loop() {
    //Call once inside loop() - all magic here
    mb.task();
-   delay(100);
+   delay(10);
 }