├── BasicRf.ino
├── README.md
└── RF.h


/BasicRf.ino:
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 1 | /*
 2 | Released under Creative Commons Attribution 4.0
 3 | by bitluni 2016
 4 | https://creativecommons.org/licenses/by/4.0/
 5 | Attribution means you can use it however you like as long you
 6 | mention that it's base on my stuff.
 7 | I'll be pleased if you'd do it by sharing http://youtube.com/bitlunislab
 8 | */
 9 | 
10 | #include "RF.h"
11 | 
12 | const int ID = 28013; 	//0..1048575 28013 was preprogrammed
13 | const int CHANNEL = 0;	//0..1
14 | const int RF_OSC = 200;	//rf signal cycle legth(µs). 200 works for me
15 | 
16 | const int RF_OUT = D6;
17 | 
18 | void setup() 
19 | {
20 |   pinMode(RF_OUT, OUTPUT);
21 | }
22 | 
23 | void loop() 
24 | {
25 | 	//turn off
26 | 	for(int i = 0; i < 5; i++)
27 | 	{
28 | 		rfWriteCode(RF_OUT, RF_OSC, ID, (1 << (CHANNEL + 1)));
29 | 	}
30 | 	delay(3000);
31 | 	//turn on
32 | 	for(int i = 0; i < 5; i++)
33 | 	{
34 | 		rfWriteCode(RF_OUT, RF_OSC, ID, 1 | (1 << (CHANNEL + 1)));
35 | 	}
36 | 	delay(3000);
37 | }
38 | 


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/README.md:
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1 | # BasicRf
2 | Basic sketch to use an Arduino as a RF remote for chap-ass power outlets (BH9938)
3 | 


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/RF.h:
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 1 | /*
 2 | Released under Creative Commons Attribution 4.0
 3 | by bitluni 2016
 4 | https://creativecommons.org/licenses/by/4.0/
 5 | Attribution means you can use it however you like as long you
 6 | mention that it's base on my stuff.
 7 | I'll be pleased if you'd do it by sharing http://youtube.com/bitlunislab
 8 | */
 9 | 
10 | //Works with BH9938 with t=200
11 | 
12 | inline void rfPreamble(int pin, int t)
13 | {
14 | 	int m = micros();
15 | 	digitalWrite(pin, 1);
16 | 	while(micros() - m < t);
17 | 	digitalWrite(pin, 0);
18 | 	while(micros() - m < t * 32);
19 | }
20 | 
21 | inline void rfWriteBit(int pin, int t, int b)
22 | {
23 | 	int m = micros();
24 | 	if(b)
25 | 	{
26 | 		digitalWrite(pin, 1);
27 | 		while(micros() - m < t * 3);
28 | 		digitalWrite(pin, 0);
29 | 		while(micros() - m < t * 4);
30 | 	}
31 | 	else
32 | 	{
33 | 		digitalWrite(pin, 1);
34 | 		while(micros() - m < t);
35 | 		digitalWrite(pin, 0);
36 | 		while(micros() - m < t * 4);
37 | 	}
38 | }
39 | 
40 | void rfWriteCode(int pin, int t, int code, int data)
41 | {
42 | 	rfPreamble(pin, t);
43 | 	for(int i = 0; i < 20; i++)
44 | 	{
45 | 		rfWriteBit(pin, t, code & 1);
46 | 		code >>= 1;
47 | 	}
48 | 	for(int i = 0; i < 4; i++)
49 | 	{
50 | 		rfWriteBit(pin, t, data & 1);
51 | 		data >>= 1;
52 | 	}
53 | }
54 | 


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