This sketch receives a command from HCA and triggers one of it relays accordingly.<\/p>\n\n\n\n
#include <SPI.h>
#include <Ethernet.h>
#include <EthernetUdp.h><\/p>\n\n\n\n
\/\/ Enter a MAC address and IP address for your controller below.
\/\/ change these to appropriate values
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x68 };
IPAddress ip(192, 168, 0, 68);
unsigned int Port_Remote = 5000; \/\/ remote port for status check
IPAddress IP_Remote(192, 168, 0, 10); \/\/ IP address for smarthome
unsigned int localPort = 5001; \/\/ local port to listen on
\/\/ we don’t check on the sender’s port or addr for now
char cmdGDoper = ‘1’; \/\/ a “1” means flip the garage door opener
char cmdResetPC = ‘2’; \/\/ a “2” means turn the computer off for 60 sec to reboot it
char cmdBathBlowerOn = ‘3’; \/\/ a “3” means turn the bath room blower on
char cmdBathBlowerOff = ‘4’; \/\/ a “4” means turn the bath room blower off
char cmdStatusCheck = ‘9’; \/\/ a “9” means reply with good status
char cmdIn = ‘0’; \/\/ used to obtain and compare buffer character
int garageDoorOperPin = 9; \/\/ digital pin to control garage door opener
int resetPCPin = 8; \/\/ digital pin to control pc relay
int bathBlowerPin = 7; \/\/ digital pin to control blower
\/\/ can not use dig pins 2, 4, 10, 11, 12, 13
\/\/ An EthernetUDP instance to let us receive packets over UDP
EthernetUDP Udp;
char packetBuffer[UDP_TX_PACKET_MAX_SIZE]; \/\/buffer to hold incoming packet<\/p>\n\n\n\n
void setup() {
digitalWrite(garageDoorOperPin, HIGH); \/\/ high=off for this relay
digitalWrite(resetPCPin, HIGH);
digitalWrite(bathBlowerPin, LOW); \/\/ low=off for this relay
pinMode(garageDoorOperPin, OUTPUT);
pinMode(resetPCPin, OUTPUT);
pinMode(bathBlowerPin, OUTPUT);
\/\/ start the Ethernet and UDP:
Ethernet.begin(mac, ip);
Udp.begin(localPort);
delay(10000);
\/\/ Serial.begin(9600);
\/\/ Serial.println(“Starting”);<\/p>\n\n\n\n
}<\/p>\n\n\n\n
void loop() {
int packetSize = Udp.parsePacket();
if(packetSize)
{
\/\/ Serial.print(“Received packet of size “);
\/\/ Serial.println(packetSize);
\/\/ Serial.print(“From “);
\/\/ IPAddress remote = Udp.remoteIP();
\/\/ for (int i =0; i < 4; i++)
\/\/ {
\/\/ Serial.print(remote[i], DEC);
\/\/ if (i < 3)
\/\/ {
\/\/ Serial.print(“.”);
\/\/ }
\/\/ }
\/\/
\/\/ Serial.print(“, port “);
\/\/ Serial.println(Udp.remotePort());<\/p>\n\n\n\n
\/\/ read the packet into packetBufffer
Udp.read(packetBuffer,1);
\/\/ Serial.print(“Contents:”);
\/\/ Serial.println(packetBuffer);
cmdIn = (packetBuffer[0]);
\/\/ press garage door opener
if (cmdIn == cmdGDoper)
{
\/\/ Serial.println(“matched1!”);
digitalWrite(garageDoorOperPin, LOW); \/\/ relay uses NO connections
delay (100); \/\/ oper relay for 0.1 sec
digitalWrite(garageDoorOperPin, HIGH);
}
\/\/ trip smarthome pc relay for a minute
if (cmdIn == cmdResetPC)
{
\/\/ Serial.println(“matched2!”);
digitalWrite(resetPCPin, LOW); \/\/ relay uses NC connections
delay (60000); \/\/ delay for 60 seconds
digitalWrite(resetPCPin, HIGH);
}
\/\/ turn bath blower on
if (cmdIn == cmdBathBlowerOn)
{
\/\/ Serial.println(“matched3!”);
digitalWrite(bathBlowerPin, HIGH); \/\/ relay uses NO connections
}
\/\/ turn bath blower off
if (cmdIn == cmdBathBlowerOff)
{
\/\/ Serial.println(“matched4!”);
digitalWrite(bathBlowerPin, LOW); \/\/ relay uses NO connections
}
\/\/ reply to status check
\/\/ respond to status check
if (cmdIn == cmdStatusCheck)
\/\/ Serial.println(“matched9!”);
{
Udp.beginPacket(IP_Remote, Port_Remote);
Udp.write(“ard68ok=yes”); \/\/ send packet good status
Udp.endPacket();
} \/\/ end of status check<\/p>\n\n\n\n
} \/\/ end of incoming packet handler
} \/\/ end of main loop<\/p>\n","protected":false},"excerpt":{"rendered":"
This sketch receives a command from HCA and triggers one of it relays accordingly. #include <SPI.h>#include <Ethernet.h>#include <EthernetUdp.h> \/\/ Enter a MAC address and IP address for your controller below.\/\/ change these to appropriate valuesbyte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x68 };IPAddress ip(192, 168, 0, 68);unsigned int Port_Remote = 5000; \/\/ remote … Continue reading Controlling Relays Sketch<\/span>