.gitignore

@@ -1 +0,0 @@
-Gerber

README.md

@@ -1,5 +1,3 @@
 | Board | Button Interrupt | RS485-Interrupt | RS485/A | RS485/B |
 |-------|------------------|-----------------|---------|---------|
 | 1.0   |               D2 |              D3 |      U7 |      U8 |
-| 2.0   |               D2 |            (D10)|      U8 |      U7 |
-| 2.1   |               D3 |              D2 |      U8 |      U7 | 

Receiver/Receiver.ino

@@ -0,0 +1,59 @@
+int sTx = 2;
+int sRx = 3;
+
+long base = 100;
+long rst = base*10; // reset
+boolean bt = false;
+long dif = 0;
+long lt = 0;
+long now = 0;
+char rcv = 0;
+int idx = 0;
+String message;
+void setup(){
+  pinMode(sRx,INPUT);
+  pinMode(sTx,OUTPUT);
+  attachInterrupt(digitalPinToInterrupt(sRx),change,CHANGE);
+  Serial.begin(115200);  
+  Serial.println("Receiver ready");
+}
+
+void reset(long dif){
+    rcv = 0;
+    idx = -1;
+    message.reserve(32);
+}
+void change(){
+  bool bt = digitalRead(sRx);
+  now = micros();
+  dif = now - lt;
+  lt = now;
+  if (dif > rst){
+    reset(dif);
+  } else {
+    handle(!bt,dif);
+  }
+}
+
+void handle(boolean bt, long dif){
+  long count = dif/base;
+  for (int i=0; i<count; i++) push(bt);
+}
+
+void push(boolean bt){
+  if (idx>=0) rcv |= bt<<idx;
+  idx++;
+  
+  if (idx == 8){
+    if (rcv == 13) {
+      Serial.println(message);
+      message = "";
+    } else {
+      message+=rcv;
+    } 
+    idx =0;
+    rcv =0;
+  }
+}
+
+void loop(){}

Sender/Sender.ino

@@ -0,0 +1,93 @@
+// Breadboard
+//int enable = 2;
+//int sTx = 4;
+//int sRx = 5;
+
+// RS485-Nano Revision 1.0
+int enable = 9;
+int sTx = 8;
+int sRx = 3;
+
+long base = 100;
+
+int id = 0;
+int baud = 19200;
+char c;
+int counter = 0;
+
+void setup(){
+  pinMode(A0,INPUT);
+  id = analogRead(A0);
+  
+  pinMode(enable,OUTPUT);
+  digitalWrite(enable,LOW);
+  
+  pinMode(sTx,OUTPUT);
+  digitalWrite(sTx,LOW);
+  
+  pinMode(sRx,INPUT);
+  Serial.begin(115200);  
+  Serial.print("Baud rate set to ");
+  Serial.println(baud);
+  Serial.print("Initialized Arduino #");
+  Serial.println(id);
+}
+
+bool sendBit(bool bt){
+  digitalWrite(sTx,bt);
+  delayMicroseconds(80);
+  if (digitalRead(sTx) != bt) return false;
+  delayMicroseconds(base-80);
+  return true;
+}
+
+bool sendChar(char c){
+  return sendBit(c & 0x01)
+      && sendBit(c & 0x02)
+      && sendBit(c & 0x04)
+      && sendBit(c & 0x08)
+      && sendBit(c & 0x10)
+      && sendBit(c & 0x20)
+      && sendBit(c & 0x40)
+      && sendBit(c & 0x80);
+}
+
+bool sendString(String s){
+  Serial.print("Sending '"+s+"'…");
+  boolean busy = false;
+  for (int i = 0; i<11; i++){
+    if (!digitalRead(sRx)) {
+      if (!busy){
+        Serial.print("busy…");
+        busy = true;
+      }
+      i = 0; // wait for free line
+    }
+    delayMicroseconds(base);
+  }
+  digitalWrite(enable,HIGH);
+  bool success = sendBit(0); // erste Flanke erzeugen
+  if (success) {
+    for (char c : s){
+      if (!sendChar(c)){
+        success = false;
+        break;
+      }
+    }
+  }
+  success = success && sendChar(13);
+  success = success && sendBit(1); // letzte Flanke erzeugen
+  digitalWrite(enable,LOW);
+  Serial.println(success ? "success" : "failed");
+  return success;
+}
+
+void loop(){
+  counter++;
+  String s = "Hier ist ";
+  s.concat(id);
+  s+=": counter = ";
+  s.concat(counter);
+  while (!sendString(s)) delay(10*base);
+  delay(id);
+}

Software/LCDReceiver/LCDReceiver.ino

@@ -1,63 +0,0 @@
-/*
- *  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 Max485_RO 2 // read-output of Max485
-#define Max485_RE 8 // not-read-enable of Max485
-#define Max485_DE 8 // data enable of Max485
-#define Max485_DI 9 // data input of Max485
-
-#define LCD_RS 10
-#define LCD_EN 11
-#define LCD_D4 4
-#define LCD_D5 5
-#define LCD_D6 6
-#define LCD_D7 7
-
-#define PROGRAM "RS485-Nano 2.1 / LCDReceive 1.2"
-
-// 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:
-
-  // set up the LCD's number of columns and rows:
-  lcd.begin(16, 4);
-  // Print a message to the LCD.
-  printMessage(PROGRAM);
-
-}
-
-void printMessage(String s){
-    Serial.println(s);
-    lcd.clear();    
-    int line = 0;
-    int col = 0;
-    auto cstr = s.c_str();
-    for (int i=0;i<s.length();i++){
-      if (col == 0 && cstr[i] == ' ') continue;
-      if (cstr[i] == '{' || cstr[i] == '}') continue;
-      lcd.print(cstr[i]);
-      col++;
-      if (cstr[i]==',' || col==16){
-        line++;
-        col=0;
-        lcd.setCursor(col, line);
-      }
-    }
-}
-
-void loop() {
-  if (available485()) {
-    printMessage(get485message());
-  }
-}

Software/ManualSend/ManualSend.ino

@@ -1,85 +0,0 @@
-/*// This sketch allows manual setting of the RS485-connected pins via serial terminal commands
-
-Commands are:
-r+ – enable read mode (^RE ← LOW)
-r- – disable read mode (^RE ← HIGH)
-w+ – enable write mode (DE ← HIGH)
-w- – disable write mode (DE ← LOW)
-h  – send HIGH level on DI
-l  – send LOW level on DI
-
-//*/
-
-#if defined(ARDUINO_AVR_UNO)
-  #define RS485_RO 5
-  #define RS485_RE 4
-  #define RS485_DE 3
-  #define RS485_DI 2
-  #define BOARD "Arduino Uno"
-#endif
-#if defined(ARDUINO_AVR_NANO)
-  #define RS485_RO 3
-  #define RS485_RE 2
-  #define RS485_DE 4
-  #define RS485_DI 5
-  #define BOARD "Arduino Nano"
-#endif
-
-String command = "";
-bool doPrint = false;
-// the setup function runs once when you press reset or power the board
-void setup() {
-  // initialize digital pin LED_BUILTIN as an output.
-  pinMode(RS485_RO, INPUT);
-  pinMode(RS485_RE, OUTPUT);
-  pinMode(RS485_DE, OUTPUT);
-  pinMode(RS485_DI, OUTPUT);
-  digitalWrite(RS485_RE,LOW);
-  digitalWrite(RS485_DE,LOW);
-  digitalWrite(RS485_DI,LOW);
-  Serial.begin(115200);
-  Serial.println(F("this is Projekte/Arduino/MAX485/ManualSend"));
-  Serial.println(F("send any of the followning commands:"));
-  Serial.println(F("- r+ (enable read)\n- r- (disable read)\n- w+ (enable write)\n- w- (disable write)\n- h (for high)\n- l (for low)"));
-}
-
-// the loop function runs over and over again forever
-void loop() {
-  while (Serial.available()){
-    char inChar = (char)Serial.read();
-    if (inChar == '\n') {
-      process(command);
-      command = ""; 
-      doPrint = true;
-    } else {
-      command += inChar;
-    }
-  }
-  if (doPrint){
-    printState();
-    delay(1000);
-  }
-}
-
-void printState(){
-  Serial.print("RE = ");
-  Serial.print(1-digitalRead(RS485_RE));
-  Serial.print(", DE = ");
-  Serial.print(digitalRead(RS485_DE));
-  Serial.print(", DI = ");
-  Serial.print(digitalRead(RS485_DI));
-  Serial.print(", RO = ");
-  Serial.println(digitalRead(RS485_RO));
-}
-
-void process(String command){
-  Serial.print(F("received:"));
-  Serial.println(command);
-  if (command == "r+") digitalWrite(RS485_RE,LOW);
-  if (command == "r-") digitalWrite(RS485_RE,HIGH);
-  if (command == "w+") digitalWrite(RS485_DE,HIGH);
-  if (command == "w-") digitalWrite(RS485_DE,LOW);
-  if (command == "h") digitalWrite(RS485_DI,HIGH);
-  if (command == "l") digitalWrite(RS485_DI,LOW);
-  printState();
-}

Software/ManualSend/Readme.md

@@ -1,4 +0,0 @@
-Erkenntnisse:
-
-1. Wenn alle Treiber inaktiv sind, also bei allen Teilnehmer DI = Low ist, kommt vom RO ein High-Signal
-2. das High-Signal ist dominant, d.h. wenn mehrere Teilnehmer senden, und mindestens ein Teilnehmer eine 1 auf den Bus legt, erhalten alle am RO einen HIGH-Pegel

Software/Sender/Sender.ino

@@ -1,124 +0,0 @@
-/*
- *  Demonstrates how to use Read Buttons in conjunction with SoftRS485:
- *
- * If a button is pressed, a corresponding flag is set.
- * The main loop checks for the state of those flags and
- * sends a message on the RS485 bus whenever a flag is set.
- */
-
-// include the library code:
-#include <SoftRS485.h>
-
-// 0=Test
-// 1=Flur
-// 2=Wohnzimmer
-// 3=Bad EG
-// 4=Treppenhaus
-// 5=Arbeitszimmer
-// 6=Bad OG
-
-#define ID 0
-#define PROGRAM "Sender"
-#define SW_VERSION "1.3"
-#define HW_VERSION "2.1"
-
-#define BTN_INT 3 // button interrupt pin
-#define Max485_RO 2 // read-output of Max485
-#define Max485_RE 3 // not-read-enable of Max485
-#define Max485_DE 8 // data enable of Max485
-#define Max485_DI 9 // data input of Max485
-
-#define TRESHOLD 1024
-#define TRIGGER_LEVEL 200
-
-//#define DEBUG
-//#define LOG_TO_SERIAL
-#define SEND_485
-
-boolean raw_states[8];
-boolean states[8];
-unsigned long capacitor[8];
-unsigned long times[8];
-
-
-
-void setup(){
-  for (int i=0; i<8;i++) {
-    capacitor[i] = 0;
-    raw_states[i] = LOW;
-    states[i] = LOW;
-  }
-  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(BTN_INT),isr,CHANGE);
-  String s = "{nano:"+String(ID)+",hw:"+HW_VERSION+","+PROGRAM+":"+SW_VERSION+"}";
-  Serial.println(s);
-  send485(s.c_str());
-#ifdef LOG_TO_SERIAL
-  Serial.println("14 15 16 17 18 19 20 21");
-#endif
-}
-
-void isr(){
-  raw_states[0] = analogRead(14)<TRIGGER_LEVEL;
-  raw_states[1] = analogRead(15)<TRIGGER_LEVEL;
-  raw_states[2] = analogRead(16)<TRIGGER_LEVEL;
-  raw_states[3] = analogRead(17)<TRIGGER_LEVEL;
-
-  raw_states[4] = analogRead(18)<TRIGGER_LEVEL;
-  raw_states[5] = analogRead(19)<TRIGGER_LEVEL;
-  raw_states[6] = analogRead(20)<TRIGGER_LEVEL;
-  raw_states[7] = analogRead(21)<TRIGGER_LEVEL;
-#ifdef LOG_TO_SERIAL
-  for (int i=0;i<8;i++){
-    Serial.print(" ");
-    Serial.print(raw_states[i]);
-    Serial.print(" ");
-  }
-  Serial.println();
-#endif
-}
-
-void send(int btn, long duration){
-  String s = "{nano:"+String(ID)+",btn:"+String(btn)+",ms:"+String(duration)+"}";
-#ifdef SEND_485
-  for (int i = 0; i<10; i++){
-    if (send485(s.c_str())) break;
-    Serial.println("collision detected, trying again:");
-  }
-#else
-  Serial.println(s);
-#endif
-}
-
-void loop(){
-  unsigned long now = micros();
-  for (int i=0;i<8;i++){
-    // we emulate a capacitor:
-    // when the button is pressed, it slowly loads, if the button is released, it unloads.
-    capacitor[i] = raw_states[i] ? capacitor[i]+1 : capacitor[i]>>1;
-
-    // if the capacitor reaches a certain treshold, the state is changed
-    boolean new_state = capacitor[i]>TRESHOLD;
-
-    // TODO: drop state after a maximum HIGH time
-
-    // when the state changes, the duration of the last state is calculated
-    if (states[i] != new_state){      
-      long diff = (now - times[i])/1000;
-      times[i] = now;
-      if (states[i]) send(i+1,diff); // old state was HIGH → we are going LOW
-      states[i] = new_state;
-    }
-  }
-}

Software/SerialTransceiver/SerialTransceiver.ino

@@ -1,38 +0,0 @@
-/*
- *  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 Max485_RO 2 // read-output of Max485
-#define Max485_RE 3 // not-read-enable of Max485
-#define Max485_DE 8 // data enable of Max485
-#define Max485_DI 9 // data input of Max485
-
-#define PROGRAM "{hw:RS485-Nano rev 2.1,firmware:Transceiver,version:1.0}"
-
-String message = "";
-char c;
-void setup() {
-  Serial.begin(115200);
-  init485(Max485_RO,Max485_RE,Max485_DE,Max485_DI); // library initialization:
-  send485(PROGRAM);
-}
-
-void loop() {
-  if (available485()) Serial.println(get485message());
-  while (Serial.available()) {
-    c = (char)Serial.read();
-    if (c == '\n') {
-      send485(message.c_str());
-      message = "";
-    } else {
-      message += c;    
-    }
-  }  
-}

Software/TempSender/TempSender.ino

@@ -1,143 +0,0 @@
-/*
- *  Demonstrates how to use Read Buttons in conjunction with SoftRS485:
- *
- * If a button is pressed, a corresponding flag is set.
- * The main loop checks for the state of those flags and
- * sends a message on the RS485 bus whenever a flag is set.
- * 
- * Additionally, the temperature is read from a DHT22 sensor once per minute
- */
-
-// include the library code:
-#include <SoftRS485.h>
-#include <SimpleDHT.h>
-
-// 0=Test
-// 1=Flur
-// 2=Wohnzimmer
-// 3=Bad EG
-// 4=Treppenhaus
-// 5=Arbeitszimmer
-// 6=Bad OG
-
-#define ID 0
-#define HW_VERSION "2.1"
-#define PROGRAM "TempSender"
-#define SW_VERSION "1.5"
-
-#define BTN_INT 3 // button interrupt pin
-#define Max485_RO 2 // read-output of Max485
-#define Max485_RE 3 // not-read-enable of Max485
-#define Max485_DE 8 // data enable of Max485
-#define Max485_DI 9 // data input of Max485
-
-#define TRESHOLD 1024
-#define TRIGGER_LEVEL 200
-
-#define DHT_PIN 4
-#define PERIOD   100000000 // 100s
-
-//#define DEBUG
-//#define LOG_TO_SERIAL
-#define SEND_485
-
-boolean raw_states[8];
-boolean states[8];
-unsigned long capacitor[8];
-unsigned long times[8];
-unsigned long sensor_time = 0;
-
-// these values are used for temperature processing
-SimpleDHT22 sensor(DHT_PIN);
-float temperature = 0;
-float humidity = 0;
-int err = SimpleDHTErrSuccess;
-
-void setup(){
-  for (int i=0; i<8;i++) {
-    capacitor[i] = 0;
-    raw_states[i] = LOW;
-    states[i] = LOW;
-  }
-  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(BTN_INT),isr,CHANGE);
-  String s = "{nano:"+String(ID)+",hw:"+HW_VERSION+","+PROGRAM+":"+SW_VERSION+"}";
-  Serial.println(s);
-  send485(s.c_str());
-#ifdef LOG_TO_SERIAL
-  Serial.println("14 15 16 17 18 19 20 21");
-#endif
-}
-
-void isr(){
-  raw_states[0] = analogRead(14)<TRIGGER_LEVEL;
-  raw_states[1] = analogRead(15)<TRIGGER_LEVEL;
-  raw_states[2] = analogRead(16)<TRIGGER_LEVEL;
-  raw_states[3] = analogRead(17)<TRIGGER_LEVEL;
-
-  raw_states[4] = analogRead(18)<TRIGGER_LEVEL;
-  raw_states[5] = analogRead(19)<TRIGGER_LEVEL;
-  raw_states[6] = analogRead(20)<TRIGGER_LEVEL;
-  raw_states[7] = analogRead(21)<TRIGGER_LEVEL;
-#ifdef LOG_TO_SERIAL
-  for (int i=0;i<8;i++){
-    Serial.print(" ");    
-    Serial.print(raw_states[i]);
-    Serial.print(" ");
-  }
-  Serial.println();
-#endif
-}
-
-void send(int btn, long duration){
-  String s = "{nano:"+String(ID)+",btn:"+String(btn)+",ms:"+String(duration)+"}";
-#ifdef SEND_485
-  for (int i = 0; i<10; i++){
-    if (send485(s.c_str())) break;
-    Serial.println("collision detected, trying again:");
-  }
-#else
-  Serial.println(s);
-#endif
-}
-
-void loop(){
-  unsigned long now = micros();
-  for (int i=0;i<8;i++){
-    // we emulate a capacitor:
-    // when the button is pressed, it slowly loads, if the button is released, it unloads.
-    capacitor[i] = raw_states[i] ? capacitor[i]+1 : capacitor[i]>>1;
-
-    // if the capacitor reaches a certain treshold, the state is changed
-    boolean new_state = capacitor[i]>TRESHOLD;
-
-    // TODO: drop state after a maximum HIGH time
-
-    // when the state changes, the duration of the last state is calculated
-    if (states[i] != new_state){      
-      long diff = (now - times[i])/1000;
-      times[i] = now;
-      if (states[i]) send(i+1,diff); // old state was HIGH → we are going LOW
-      states[i] = new_state;
-    }
-  }
-
-  if (now - sensor_time > PERIOD){
-    sensor_time = now;
-    if ((err = sensor.read2(&temperature, &humidity, NULL)) == SimpleDHTErrSuccess) {
-      String s = "{nano:"+String(ID)+",temp:"+String(temperature,1)+",humi:"+String(humidity,1)+"}";
-      send485(s.c_str());
-    }
-  }
-}

Software/TempSenderPlusIR/TempSenderPlusIR.ino

@@ -1,194 +0,0 @@
-/*
- *  Demonstrates how to use Read Buttons in conjunction with SoftRS485:
- *
- * If a button is pressed, a corresponding flag is set.
- * The main loop checks for the state of those flags and
- * sends a message on the RS485 bus whenever a flag is set.
- * 
- * Additionally, the temperature is read from a DHT22 sensor once per minute
- */
-
-// include the library code:
-#include <SoftRS485.h>
-#include <SimpleDHT.h>
-#include <TinyIRSender.hpp>
-
-// 0=Test
-// 1=Flur
-// 2=Wohnzimmer
-// 3=Bad EG
-// 4=Treppenhaus
-// 5=Arbeitszimmer
-// 6=Bad OG
-
-#define ID 0
-#define PROGRAM "Temp+IR"
-#define SW_VERSION "0.1"
-#define HW_VERSION "2.1"
-
-#define BTN_INT 3 // button interrupt pin
-#define Max485_RO 2 // read-output of Max485
-#define Max485_RE 3 // not-read-enable of Max485
-#define Max485_DE 8 // data enable of Max485
-#define Max485_DI 9 // data input of Max485
-
-#define TRESHOLD 1024
-#define TRIGGER_LEVEL 200
-
-#define DHT_PIN 4
-#define PERIOD   100000000 // 100s
-
-#define IR_PIN 5
-#define REPEATS 2
-
-//#define DEBUG
-//#define LOG_TO_SERIAL
-#define SEND_485
-
-boolean raw_states[8];
-boolean states[8];
-unsigned long capacitor[8];
-unsigned long times[8];
-unsigned long sensor_time = 0;
-
-// these values are used for temperature processing
-SimpleDHT11 sensor(DHT_PIN);
-byte temperature = 0;
-byte humidity = 0;
-int err = SimpleDHTErrSuccess;
-
-// these constants are used for message parsing in handle(message)
-const char* outer_delimiter = "{,}";
-const char* inner_delimiter = ":";
-
-void setup(){
-  for (int i=0; i<8;i++) {
-    capacitor[i] = 0;
-    raw_states[i] = LOW;
-    states[i] = LOW;
-  }
-  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(BTN_INT),isr,CHANGE);
-  String s = "{nano:"+String(ID)+",hw:"+HW_VERSION+","+PROGRAM+":"+SW_VERSION+"}";
-  Serial.println(s);
-  send485(s.c_str());
-#ifdef LOG_TO_SERIAL
-  Serial.println("14 15 16 17 18 19 20 21");
-#endif
-}
-
-void isr(){
-  raw_states[0] = analogRead(14)<TRIGGER_LEVEL;
-  raw_states[1] = analogRead(15)<TRIGGER_LEVEL;
-  raw_states[2] = analogRead(16)<TRIGGER_LEVEL;
-  raw_states[3] = analogRead(17)<TRIGGER_LEVEL;
-
-  raw_states[4] = analogRead(18)<TRIGGER_LEVEL;
-  raw_states[5] = analogRead(19)<TRIGGER_LEVEL;
-  raw_states[6] = analogRead(20)<TRIGGER_LEVEL;
-  raw_states[7] = analogRead(21)<TRIGGER_LEVEL;
-#ifdef LOG_TO_SERIAL
-  for (int i=0;i<8;i++){
-    Serial.print(" ");    
-    Serial.print(raw_states[i]);
-    Serial.print(" ");
-  }
-  Serial.println();
-#endif
-}
-
-void send(int btn, long duration){
-  String s = "{nano:"+String(ID)+",btn:"+String(btn)+",ms:"+String(duration)+"}";
-#ifdef SEND_485
-  for (int i = 0; i<10; i++){
-    if (send485(s.c_str())) break;
-    Serial.println("collision detected, trying again:");
-  }
-#else
-  Serial.println(s);
-#endif
-}
-
-
-
-
-void handle(String message){
-#ifdef LOG_TO_SERIAL
-  Serial.println(message);
-#endif   
-  unsigned int ir_cmd = 0;
-  unsigned int ir_addr = 0;
-  unsigned int nano = 0;
-
-  const char* outer_state = NULL;
-  const char* inner_state = NULL;  
-  char* token = strtok_r(message.c_str(), outer_delimiter, &outer_state);
-  
-  while (token != NULL) {    
-    char* key = strtok_r(token,inner_delimiter,&inner_state);
-    char* val = strtok_r(NULL,inner_delimiter,&inner_state);
-    if (strcmp(key,"nano")==0) nano = atoi(val);      
-    if (strcmp(key,"addr")==0) ir_addr = atoi(val);
-    if (strcmp(key,"ir")==0) ir_cmd = atoi(val);
-    token=strtok_r(NULL, outer_delimiter, &outer_state);
-  }
-  
-  if (nano == ID){ // the message is addressed to us!
- 
-    if (ir_addr && ir_cmd){
-#ifdef LOG_TO_SERIAL
-      Serial.print("Sending 0x");
-      Serial.print(ir_cmd,HEX);
-      Serial.print(" to 0x");
-      Serial.println(ir_addr,HEX);
-#endif
-      sendNECMinimal(IR_PIN, ir_addr, ir_cmd, REPEATS);
-     }
-  }
-}
-
-void loop(){
-  unsigned long now = micros();
-  for (int i=0;i<8;i++){
-    // we emulate a capacitor:
-    // when the button is pressed, it slowly loads, if the button is released, it unloads.
-    capacitor[i] = raw_states[i] ? capacitor[i]+1 : capacitor[i]>>1;
-
-    // if the capacitor reaches a certain treshold, the state is changed
-    boolean new_state = capacitor[i]>TRESHOLD;
-
-    // TODO: drop state after a maximum HIGH time
-
-    // when the state changes, the duration of the last state is calculated
-    if (states[i] != new_state){      
-      long diff = (now - times[i])/1000;
-      times[i] = now;
-      if (states[i]) send(i+1,diff); // old state was HIGH → we are going LOW
-      states[i] = new_state;
-    }
-  }
-
-  if (now - sensor_time > PERIOD){
-    sensor_time = now;
-    if ((err = sensor.read(&temperature, &humidity, NULL)) == SimpleDHTErrSuccess) {
-      String s = "{nano:"+String(ID)+",temp:"+String((int)temperature)+",humi:"+String((int)humidity)+"}";
-#ifdef LOG_TO_SERIAL
-      Serial.println(s);
-#endif
-      send485(s.c_str());
-    }
-  }
-  
-  if (available485()) handle(get485message());
-}