From deee00e299a640a25e10286fdbd6f233ec96eaf2 Mon Sep 17 00:00:00 2001
From: lmtreser <lmtreser@gmail.com>
Date: Wed, 31 Jul 2024 16:13:40 -0300
Subject: [PATCH] add modbus software serial example

---
 dispositivos/modbus/ModbusRTUSlave_SS.ino | 54 +++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 dispositivos/modbus/ModbusRTUSlave_SS.ino

diff --git a/dispositivos/modbus/ModbusRTUSlave_SS.ino b/dispositivos/modbus/ModbusRTUSlave_SS.ino
new file mode 100644
index 0000000..04297aa
--- /dev/null
+++ b/dispositivos/modbus/ModbusRTUSlave_SS.ino
@@ -0,0 +1,54 @@
+/*
+  ModbusRTUSlave Software Serial
+
+  Este ejemplo permite configurar y usar una placa Arduino UNO como dispositivo Modbus esclavo
+  mediante Software Serial.
+  Usa la biblioteca ModbusRTUSlave (https://github.com/CMB27/ModbusRTUSlave).
+  
+  Circuito:
+
+  - Un LED integrado en el pin 13
+  - Serial RX a pin 10 - RO de un conversor MAX485/SN75176
+  - Serial TX a pin 11 - DI de un conversor MAX485/SN75176
+
+  Trama de datos (master):
+
+  ON:   02 05 00 00 FF 00 8C 09
+  OFF:  02 05 00 00 00 00 CD F9
+
+  Created: 2023-07-22
+  By: C. M. Bulliner
+  Modified: 2024-01-27
+  By: C. M. Bulliner
+  Modified: 2024-07-25
+  By: L. M. Treser
+  Last Modified: 2024-07-31
+  By: L. M. Treser
+
+*/
+
+#include <SoftwareSerial.h>
+#include <ModbusRTUSlave.h>
+
+const uint8_t coilPin = 13;
+const uint8_t dePin = 7;
+const uint8_t rxPin = 10;
+const uint8_t txPin = 11;
+const uint8_t modbusId = 2;
+
+SoftwareSerial mySerial(rxPin, txPin);
+ModbusRTUSlave modbus(mySerial, dePin);
+
+bool coils[1];
+
+void setup() {
+  pinMode(coilPin, OUTPUT);
+  modbus.configureCoils(coils, 1);
+  modbus.begin(modbusId, 38400);
+}
+
+void loop() {
+
+  modbus.poll();
+  digitalWrite(coilPin, coils[0]);
+}