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56 lines
1.5 KiB
56 lines
1.5 KiB
12 months ago
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/**
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@file TempSensor.ino
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Modbus-Arduino Example - TempSensor (Modbus Serial)
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Copyright (C) 2023 Pascal JEAN aka epsilonrt
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Copyright (C) 2014 André Sarmento Barbosa
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https://github.com/epsilonrt/modbus-serial
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*/
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#include <ModbusSerial.h>
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// Used Pins
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const int SensorPin = A0;
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const int TxenPin = -1; // -1 disables the feature, change that if you are using an RS485 driver, this pin would be connected to the DE and /RE pins of the driver.
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const byte SlaveId = 14;
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// Modbus Registers Offsets (0-9999)
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const int SensorIreg = 0;
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#define MySerial Serial // define serial port used, Serial most of the time, or Serial1, Serial2 ... if available
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const unsigned long Baudrate = 38400;
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// ModbusSerial object
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ModbusSerial mb (MySerial, SlaveId, TxenPin);
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long ts;
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void setup() {
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MySerial.begin (Baudrate); // works on all boards but the configuration is 8N1 which is incompatible with the MODBUS standard
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// prefer the line below instead if possible
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// MySerial.begin (Baudrate, MB_PARITY_EVEN);
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mb.config (Baudrate);
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mb.setAdditionalServerData ("TEMP_SENSOR"); // for Report Server ID function (0x11)
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// Add SensorIreg register - Use addIreg() for analog Inputs
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mb.addIreg (SensorIreg);
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ts = millis();
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}
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void loop() {
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// Call once inside loop() - all magic here
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mb.task();
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// Read each two seconds
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if (millis() > ts + 2000) {
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ts = millis();
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// Setting raw value (0-1024)
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mb.Ireg (SensorIreg, analogRead (SensorPin));
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}
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}
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