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#include <SoftwareSerial.h>
#define SSerialRX 13 // RO
#define SSerialTX 10 // DI
#define SSerialTxControl 11 // DE + RE jumpered 12
#define RelayStartPin 2
#define RelayEndPin 9
#define RS485Transmit HIGH
#define RS485Receive LOW
#define RS485Baud 115200
#define SerialDebug 0
// Manually flashed from 0 to 7
#define SlaveId 0
SoftwareSerial RS485Serial(SSerialRX, SSerialTX);
int packet;
int tree;
int channel;
int mode;
void setup()
{
if (SerialDebug) {
Serial.begin(9600);
Serial.println("SerialRemote");
}
for (int i=RelayStartPin; i<=RelayEndPin; i++) {
pinMode(i, OUTPUT);
}
pinMode(SSerialTxControl, OUTPUT);
digitalWrite(SSerialTxControl, RS485Receive);
RS485Serial.begin(RS485Baud);
}
void loop()
{
if (RS485Serial.available())
{
packet = RS485Serial.read();
/*
Packet structure is 1 byte == 8 bits
| Tree ID (3 bits) | Channel ID (3 bits) | Mode (2 bits) |
Tree ID is 0-7
Channe ID is 0-7
Mode is one of:
0 - Off
1 - On
2 - Unused (assume on)
3 - Unused (assume on)
*/
tree = (packet & 224) >> 5;
if (tree == SlaveId) {
channel = (packet & 28) >> 2;
mode = packet & 3;
if (mode) {
digitalWrite(channel, HIGH);
} else {
digitalWrite(channel, LOW);
}
}
if (SerialDebug) {
Serial.println(packet);
}
}
}
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