From 1bdfaa152384044a1d736c8df81ba329824097e4 Mon Sep 17 00:00:00 2001
From: Stephan Richter <s.richter@srsoftware.de>
Date: Sun, 3 Dec 2023 12:23:19 +0100
Subject: [PATCH] adopted software to Nano 2.0

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>
---
 Software/LCDReceiver/LCDReceiver.ino | 58 +++++++++++++++++
 Software/Sender/Sender.ino           | 96 ++++++++++++++++++++++++++++
 2 files changed, 154 insertions(+)
 create mode 100644 Software/LCDReceiver/LCDReceiver.ino
 create mode 100644 Software/Sender/Sender.ino

diff --git a/Software/LCDReceiver/LCDReceiver.ino b/Software/LCDReceiver/LCDReceiver.ino
new file mode 100644
index 0000000..436abf5
--- /dev/null
+++ b/Software/LCDReceiver/LCDReceiver.ino
@@ -0,0 +1,58 @@
+/*
+ *  Demonstrates how to use LCDisplay in conjunction with SoftRS485:
+ *
+ *  The main _loop_ of this program listens on the RS485 bus.
+ *  Whenever a message is received from the bus, it is displayed on the LCD.
+ */
+
+// include the library code:
+#include <LiquidCrystal.h>
+#include <SoftRS485.h>
+
+#define PROGRAM "RS485-Nano Rev 2.0 / LCDReceive 1.2"
+
+#define Max485_RO 3 // read-output of Max485
+#define Max485_RE 5 // not-read-enable of Max485
+#define Max485_DE 9 // data enable of Max485
+#define Max485_DI 8 // data input of Max485
+
+#define LCD_RS 4
+#define LCD_EN 6
+#define LCD_D4 7
+#define LCD_D5 11
+#define LCD_D6 12
+#define LCD_D7 13
+
+
+
+// initialize the library by associating any needed LCD interface pin with the arduino pin number it is connected to
+LiquidCrystal lcd(LCD_RS, LCD_EN, LCD_D4, LCD_D5, LCD_D6, LCD_D7);
+
+
+void setup() {
+  Serial.begin(115200);
+  init485(Max485_RO,Max485_RE,Max485_DE,Max485_DI); // library initialization:
+  invert485polarity(true);
+  // set up the LCD's number of columns and rows:
+  lcd.begin(16, 2);
+  // Print a message to the LCD.
+  Serial.println(PROGRAM);
+  lcd.print(PROGRAM);
+
+}
+
+void loop() {
+  if (available485()) {
+    String s = get485message();
+    Serial.println(s);
+    lcd.clear();
+    lcd.setCursor(0, 0);
+    lcd.print(s);
+    if (s.length()>16) {
+      lcd.setCursor(0, 1);
+      s=s.substring(16);
+      s.trim();
+      lcd.print(s);
+    }
+  }
+}
diff --git a/Software/Sender/Sender.ino b/Software/Sender/Sender.ino
new file mode 100644
index 0000000..253f6fa
--- /dev/null
+++ b/Software/Sender/Sender.ino
@@ -0,0 +1,96 @@
+/*
+ *  Demonstrates how to use LCDisplay in conjunction with SoftRS485:
+ *
+ *  The main _loop_ of this program listens on the RS485 bus.
+ *  Whenever a message is received from the bus, it is displayed on the LCD.
+ */
+
+// include the library code:
+#include <SoftRS485.h>
+
+#define PROGRAM "RS485-Nano 2.0 / Sender 1.0"
+
+#define BTN_INT 2 // button interrupt pin
+#define Max485_RO 3 // read-output of Max485
+#define Max485_RE 5 // not-read-enable of Max485
+#define Max485_DE 9 // data enable of Max485
+#define Max485_DI 8 // data input of Max485
+
+#define TRESHOLD 100000 // 100ms
+#define ID 0
+// 0=Test
+// 1=Arbeitszimmer
+// 2=Küche
+// 3=Bad
+
+//#define LOG_TO_SERIAL
+#define SEND_485
+
+boolean states[8];
+unsigned long times[8];
+
+
+
+void setup() {
+  Serial.begin(115200);
+  init485(Max485_RO,Max485_RE,Max485_DE,Max485_DI); // library initialization:
+  pinMode(BTN_INT,INPUT_PULLUP);
+  pinMode(14,INPUT_PULLUP);
+  pinMode(15,INPUT_PULLUP);
+  pinMode(16,INPUT_PULLUP);
+  pinMode(17,INPUT_PULLUP);
+  pinMode(18,INPUT_PULLUP);
+  pinMode(19,INPUT_PULLUP);
+  pinMode(20,INPUT_PULLUP);
+  pinMode(21,INPUT_PULLUP);
+
+  attachInterrupt(digitalPinToInterrupt(2),isr,CHANGE);
+  // Print a message to the LCD.
+  Serial.println(PROGRAM);
+#ifdef LOG_TO_SERIAL
+  Serial.println("14 15 16 17 18 19 20 21");
+#endif
+}
+
+void isr(){
+  states[0] = !digitalRead(14);
+  states[1] = !digitalRead(15);
+  states[2] = !digitalRead(16);
+  states[3] = !digitalRead(17);
+
+  states[4] = !digitalRead(18);
+  states[5] = !digitalRead(19);
+  states[6] = !(analogRead(20)>200);
+  states[7] = !(analogRead(21)>200);
+#ifdef LOG_TO_SERIAL
+  for (int i=0;i<8;i++){
+    Serial.print(" "); Serial.print(states[i]); Serial.print(" ");
+  }
+  Serial.println();
+#endif
+}
+
+#ifdef SEND_485
+void send(int btn){
+  String s = "{nano:"+String(ID)+",btn:"+String(btn)+"}";
+  for (int i = 0; i<10; i++){    
+    if (send485(s.c_str())) break;
+    Serial.println("collision detected, trying again:");
+  }
+}
+#endif
+
+void loop(){
+  unsigned long now = micros();
+  for (int i=0;i<8;i++){
+    if (states[i]){
+      if (now - times[i] > TRESHOLD){
+#ifdef SEND_485
+        send(i+1);
+#endif
+        times[i] = now;
+      }
+      states[i] = 0;
+    }
+  }
+}