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@ -4,23 +4,27 @@ |
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* If a button is pressed, a corresponding flag is set. |
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* If a button is pressed, a corresponding flag is set. |
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* The main loop checks for the state of those flags and |
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* The main loop checks for the state of those flags and |
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* sends a message on the RS485 bus whenever a flag is set. |
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* sends a message on the RS485 bus whenever a flag is set. |
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*
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* Additionally, the temperature is read from a DHT22 sensor once per minute |
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*/ |
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*/ |
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// include the library code:
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// include the library code:
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#include <SoftRS485.h> |
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#include <SoftRS485.h> |
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#include <AM2302-Sensor.h> |
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#include <AM2302-Sensor.h> |
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#define PROGRAM "RS485-Nano 2.1 / TempSender 1.1" |
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#define PROGRAM "RS485-Nano 2.2 / TempSender 1.2" |
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#define BTN_INT 3 // button interrupt pin
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#define BTN_INT 3 // button interrupt pin
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#define Max485_RO 2 // read-output of Max485
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#define Max485_RO 2 // read-output of Max485
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#define Max485_RE 3 // not-read-enable of Max485
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#define Max485_RE 3 // not-read-enable of Max485
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#define Max485_DE 8 // data enable of Max485
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#define Max485_DE 8 // data enable of Max485
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#define Max485_DI 9 // data input of Max485
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#define Max485_DI 9 // data input of Max485
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#define TRESHOLD 1024 |
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#define DHT_PIN 4 |
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#define DHT_PIN 4 |
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#define TRESHOLD 100000 // 100ms
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#define PERIOD 100000000 // 100s
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#define PERIOD 100000000 // 100s
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#define ID 3 |
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#define ID 0 |
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// 0=Test
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// 0=Test
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// 1=Arbeitszimmer
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// 1=Arbeitszimmer
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// 2=Küche
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// 2=Küche
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@ -31,12 +35,19 @@ |
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AM2302::AM2302_Sensor am2302{DHT_PIN}; |
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AM2302::AM2302_Sensor am2302{DHT_PIN}; |
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boolean raw_states[8]; |
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boolean states[8]; |
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boolean states[8]; |
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unsigned long capacitor[8]; |
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unsigned long times[8]; |
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unsigned long times[8]; |
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unsigned long sensor_time = PERIOD; |
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unsigned long sensor_time = PERIOD; |
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void setup(){ |
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void setup(){ |
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for (int i=0; i<8;i++) { |
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capacitor[i] = 0; |
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raw_states[i] = LOW; |
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states[i] = LOW; |
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} |
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Serial.begin(115200); |
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Serial.begin(115200); |
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am2302.begin(); |
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am2302.begin(); |
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init485(Max485_RO,Max485_RE,Max485_DE,Max485_DI); // library initialization:
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init485(Max485_RO,Max485_RE,Max485_DE,Max485_DI); // library initialization:
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@ -50,7 +61,7 @@ void setup(){ |
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pinMode(20,INPUT_PULLUP); |
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pinMode(20,INPUT_PULLUP); |
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pinMode(21,INPUT_PULLUP); |
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pinMode(21,INPUT_PULLUP); |
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attachInterrupt(digitalPinToInterrupt(2),isr,FALLING); |
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attachInterrupt(digitalPinToInterrupt(BTN_INT),isr,CHANGE); |
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// Print a message to the LCD.
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// Print a message to the LCD.
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Serial.println(PROGRAM); |
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Serial.println(PROGRAM); |
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#ifdef LOG_TO_SERIAL |
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#ifdef LOG_TO_SERIAL |
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@ -59,45 +70,55 @@ void setup(){ |
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} |
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} |
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void isr(){ |
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void isr(){ |
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states[0] = !digitalRead(14); |
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raw_states[0] = analogRead(14)<400; |
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states[1] = !digitalRead(15); |
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raw_states[1] = analogRead(15)<400; |
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states[2] = !digitalRead(16); |
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raw_states[2] = analogRead(16)<400; |
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states[3] = !digitalRead(17); |
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raw_states[3] = analogRead(17)<400; |
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states[4] = !digitalRead(18); |
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raw_states[4] = analogRead(18)<400; |
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states[5] = !digitalRead(19); |
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raw_states[5] = analogRead(19)<400; |
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states[6] = !(analogRead(20)>200); |
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raw_states[6] = analogRead(20)<400; |
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states[7] = !(analogRead(21)>200); |
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raw_states[7] = analogRead(21)<400; |
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#ifdef LOG_TO_SERIAL |
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#ifdef LOG_TO_SERIAL |
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for (int i=0;i<8;i++){ |
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for (int i=0;i<8;i++){ |
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Serial.print(" "); Serial.print(states[i]); Serial.print(" "); |
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Serial.print(" ");
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Serial.print(raw_states[i]); |
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Serial.print(" "); |
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} |
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} |
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Serial.println(); |
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Serial.println(); |
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#endif |
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#endif |
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} |
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} |
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void send(int btn, long duration){ |
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String s = "{nano:"+String(ID)+",btn:"+String(btn)+",ms:"+String(duration)+"}"; |
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#ifdef SEND_485 |
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#ifdef SEND_485 |
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void send(int btn){ |
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String s = "{nano:"+String(ID)+",btn:"+String(btn)+"}"; |
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for (int i = 0; i<10; i++){ |
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for (int i = 0; i<10; i++){ |
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if (send485(s.c_str())) break; |
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if (send485(s.c_str())) break; |
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Serial.println("collision detected, trying again:"); |
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Serial.println("collision detected, trying again:"); |
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} |
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} |
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} |
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#else |
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Serial.println(s); |
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#endif |
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#endif |
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} |
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void loop(){ |
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void loop(){ |
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unsigned long now = micros(); |
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unsigned long now = micros(); |
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for (int i=0;i<8;i++){ |
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for (int i=0;i<8;i++){ |
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if (states[i]){ |
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// we emulate a capacitor:
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delay(1); |
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// when the button is pressed, it slowly loads, if the button is released, it unloads.
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if (now - times[i] > TRESHOLD){ |
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capacitor[i] = raw_states[i] ? capacitor[i]+1 : capacitor[i]>>1; |
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#ifdef SEND_485 |
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send(i+1); |
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// if the capacitor reaches a certain treshold, the state is changed
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#endif |
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boolean new_state = capacitor[i]>TRESHOLD; |
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times[i] = now; |
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} |
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// TODO: drop state after a maximum HIGH time
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states[i] = 0; |
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// when the state changes, the duration of the last state is calculated
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if (states[i] != new_state){
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long diff = (now - times[i])/1000; |
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times[i] = now; |
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if (states[i]) send(i+1,diff); // old state was HIGH → we are going LOW
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states[i] = new_state; |
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} |
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} |
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} |
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} |
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@ -107,10 +128,6 @@ void loop(){ |
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if (status == 0){ |
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if (status == 0){ |
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String s = "{nano:"+String(ID)+",temp:"+String(am2302.get_Temperature())+",humi:"+String(am2302.get_Hunidity())+"}"; |
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String s = "{nano:"+String(ID)+",temp:"+String(am2302.get_Temperature())+",humi:"+String(am2302.get_Hunidity())+"}"; |
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send485(s.c_str()); |
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send485(s.c_str()); |
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#ifdef LOG_TO_SERIAL |
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Serial.println(s); |
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#endif |
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} |
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} |
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} |
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} |
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} |
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} |
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