Arduino controller for radio controlled sockets based on SC5272; mane are made by Lloyotron.

SConstruct

env = Environment(tools=["default", "arduino"])
env.ConfigureBoard("atmega328")
core = env.ArduinoCore()

sketch = env.Sketch("test", ["test.cpp", core])
env.Upload(sketch)

test.cpp

#include <Arduino.h>

// 10kHz clock
#define DELAY_CLOCKS(n) delayMicroseconds((n) * 100)

#define PIN 13

void send_pulse(int time_high, int time_low) {
	digitalWrite(PIN, HIGH); DELAY_CLOCKS(time_high);
	digitalWrite(PIN, LOW);  DELAY_CLOCKS(time_low);
}

#define F 2
void send_bit(int bit) {
	switch (bit) {
		case 0:
			send_pulse(4, 12);
			send_pulse(4, 12);
			return;
		case 1:
			send_pulse(12, 4);
			send_pulse(12, 4);
		case F:
			send_pulse(4, 12);
			send_pulse(12, 4);
			return;
	}
}

void send_sync() {
	send_pulse(4, 124);
}

void send_frame(int addr_a, int addr_b, int value) {
	for (int word = 0; word < 4; word++) {
		for (int a_bit = 0; a_bit < 4; a_bit++)
			send_bit(addr_a == a_bit ? 0 : F);
		for (int b_bit = 0; b_bit < 4; b_bit++)
			send_bit(addr_b == b_bit ? 0 : F);
		send_bit(0);
		send_bit(0);
		send_bit(0);
		send_bit(value ? 1 : 0);
		send_sync();
	}
}

void setup() {
	pinMode(PIN, OUTPUT);
}

void loop() {
	send_frame(0, 0, 1);
	delay(1000);
	send_frame(0, 0, 0);
	delay(1000);
}