RPI pin Arduino
RXD TXD
TXD RXD
- GPIO6 RST
+ BCM25 RST
GND GND
+5V RAW
2 433Mhz receive
// 3 433Mhz outdoor temperature sensor receiver # DISABLED
- 8 DHT22
+ 8 DHT22 (VCC from arduino VCC)
10 433Mhz send
11 DS18B20
- 12 513Mhz send
+ 12 315Mhz send
13 status LED
*/
DallasTemperature sensors(&oneWire);
-// 513Mhz light sockets
+// 315Mhz light sockets
#define TX_PIN 12
#define LED_PIN 13
+#define LED_ON digitalWrite(LED_PIN, HIGH);
+#define LED_OFF digitalWrite(LED_PIN, LOW);
int int_0 = 300; // ms
int int_1 = 900; // ms
int wait = 2000; // ms
-int repeat = 5; // times
+int repeat = 5; // times (5 times seem a little low for sensors which are more than 10m away)
-void send_513(char *code) {
- Serial.print("send 513Mhz ");
+void send_315(char *code) {
+ Serial.print("send 315Mhz ");
Serial.println(code);
// we have to send same signal at least two times
delayMicroseconds(i2);
}
+ digitalWrite(LED_PIN, LOW);
+
delayMicroseconds(wait); // guess
}
- digitalWrite(LED_PIN, LOW);
}
#include "DHT.h"
DHT dht;
+#include "RunningAverage.h"
+
+RunningAverage temp_avg(10);
+RunningAverage hum_avg(10);
+
// setup
void help() {
Serial.begin(9600);
mySwitch.enableReceive(0); // Receiver on inerrupt 0 => that is pin #2
mySwitch.enableTransmit(10); // with sender wired in receiving doesn't work, pin #10
+ mySwitch.setRepeatTransmit(repeat); // or change to be different for 433 and 315 MHz
// DS18B20
sensors.begin();
// DHT22
dht.setup(8);
+ temp_avg.addValue( dht.getTemperature() );
+ hum_avg.addValue( dht.getHumidity() );
+
}
int serial_pos = 0;
char serial_data[2]; // socket (0-9), state (0-1)
-char binary_data[24];
+char binary_data[32];
+unsigned int dht22_errors = 0;
+
+unsigned long time = millis();
void loop() {
+ if ( millis() - time > 2000 ) {
+ float t = dht.getTemperature();
+ float delta_t = abs(t - temp_avg.getAverage());
+ if ( dht.getStatus() == 0 && delta_t < 10 )
+ temp_avg.addValue( t );
+ else dht22_errors++;
+ float h = dht.getHumidity();
+ float delta_h = abs(h - hum_avg.getAverage());
+ if ( dht.getStatus() == 0 && delta_h < 10 )
+ hum_avg.addValue( h );
+ else dht22_errors++;
+ time = millis();
+ }
+
if (mySwitch.available()) {
Serial.print(mySwitch.getReceivedBitlength());
Serial.print(" bits ");
Serial.readBytesUntil('\n', binary_data, sizeof(binary_data));
Serial.print("# send B");
Serial.println( binary_data );
+ LED_ON
mySwitch.send( binary_data );
+ LED_OFF
} else
- // light sockets at 513 Mhz
+ if ( input == 'R' ) {
+ Serial.readBytesUntil('\n', binary_data, sizeof(binary_data));
+ Serial.print("# send 315 binary ");
+ Serial.println( binary_data );
+ send_315( binary_data );
+ } else
+
+ // light sockets at 315 Mhz
if (input == 'a') {
- send_513("1000100110110000000000010");
+ send_315("1000100110110000000000010");
} else
if (input == 'b') {
- send_513("1011001001011111000000010");
+ send_315("1011001001011111000000010");
} else
// DHT22
if (input == 'd') {
Serial.print("temperature=");
- Serial.print(dht.getTemperature());
+ Serial.print(temp_avg.getAverage());
Serial.print(" humidity=");
- Serial.print(dht.getHumidity());
- Serial.print(" status=");
- Serial.println(dht.getStatusString());
+ Serial.print(hum_avg.getAverage());
+ Serial.print(" errors=");
+ Serial.println(dht22_errors);
}
- if ( input >= 0x30 && input <= 0x39 ) {
+ if ( input >= 0x30 && input <= 0x39 && serial_pos < 2 ) {
input = input - 0x30; // ASCII to number
serial_data[serial_pos++] = input;
} else {
byte on = serial_data[1];
+ LED_ON
+
// switches, 433 Mhz set of 3
switch ( serial_data[0] ) {
case 1:
on ? mySwitch.send("001111110000000011000000")
: mySwitch.send("001111110000000000000000");
break;
+ case 5:
+/*
+ cca. 320Mhz 4 channel 4.8A 220V relay
+
+ A 1101001010011010011100010
+ B 1101001010011010011101000
+ C 1101001010011010011100100
+ D 1101001010011010011110000
+ off 1101001010011010011111000
+ on 1101001010011010011100110
+*/
+ switch ( on ) {
+ case '0': send_315( "1101001010011010011111000" );
+ case '1': send_315( "1101001010011010011100110" );
+ case 'A': send_315( "1101001010011010011100010" );
+ case 'B': send_315( "1101001010011010011101000" );
+ case 'C': send_315( "1101001010011010011100100" );
+ case 'D': send_315( "1101001010011010011110000" );
+ default: Serial.println("# ERROR: use 0-off 1-on A B C D");
+ }
default:
Serial.print("# invalid switch number ");
Serial.println(serial_data[0], DEC);
}
+ LED_OFF
+
// reset for later
serial_pos = 0;
}