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- /*
- * https://github.com/ffedoroff/nodemcu-firmware contributed by Roman Fedorov
- *
- * Module for operate 433/315Mhz devices like power outlet sockets, relays, etc.
- * This will most likely work with all popular low cost power outlet sockets
- * with a SC5262 / SC5272, HX2262 / HX2272, PT2262 / PT2272, EV1527,
- * RT1527, FP1527 or HS1527 chipset.
- *
- * This module using some code from original rc-switch arduino lib
- * https://github.com/sui77/rc-switch/ but unfortunatelly NodeMCU and Arduino
- * are not fully compatable, and it cause for full rewrite rc-switch lib into new rfswitch lib.
- */
- #include "module.h"
- #include "lauxlib.h"
- #include "platform.h"
- #include "user_interface.h"
- typedef struct HighLow {
- uint8_t high;
- uint8_t low;
- } HighLow;
- typedef struct Protocol {
- int pulseLength;
- HighLow syncFactor;
- HighLow zero;
- HighLow one;
- /** @brief if true inverts the high and low logic levels in the HighLow structs */
- bool invertedSignal;
- } Protocol;
- /* Format for protocol definitions:
- * {pulselength, Sync bit, "0" bit, "1" bit}
- *
- * pulselength: pulse length in microseconds, e.g. 350
- * Sync bit: {1, 31} means 1 high pulse and 31 low pulses
- * (perceived as a 31*pulselength long pulse, total length of sync bit is
- * 32*pulselength microseconds), i.e:
- * _
- * | |_______________________________ (don't count the vertical bars)
- * "0" bit: waveform for a data bit of value "0", {1, 3} means 1 high pulse
- * and 3 low pulses, total length (1+3)*pulselength, i.e:
- * _
- * | |___
- * "1" bit: waveform for a data bit of value "1", e.g. {3,1}:
- * ___
- * | |_
- *
- * These are combined to form Tri-State bits when sending or receiving codes.
- */
- static const Protocol proto[] = {
- { 350, { 1, 31 }, { 1, 3 }, { 3, 1 }, false }, // protocol 1
- { 650, { 1, 10 }, { 1, 2 }, { 2, 1 }, false }, // protocol 2
- { 100, { 30, 71 }, { 4, 11 }, { 9, 6 }, false }, // protocol 3
- { 380, { 1, 6 }, { 1, 3 }, { 3, 1 }, false }, // protocol 4
- { 500, { 6, 14 }, { 1, 2 }, { 2, 1 }, false }, // protocol 5
- { 450, { 23, 1 }, { 1, 2 }, { 2, 1 }, true } // protocol 6 (HT6P20B)
- };
- /**
- * Transmit a single high-low pulse.
- */
- void transmit(HighLow pulses, bool invertedSignal, int pulseLength, int pin) {
- platform_gpio_write(pin, !invertedSignal);
- os_delay_us(pulseLength * pulses.high);
- platform_gpio_write(pin, invertedSignal);
- os_delay_us(pulseLength * pulses.low);
- }
- /**
- * Transmit the first 'length' bits of the integer 'code'. The
- * bits are sent from MSB to LSB, i.e., first the bit at position length-1,
- * then the bit at position length-2, and so on, till finally the bit at position 0.
- */
- void send(unsigned long protocol_id, unsigned long pulse_length, unsigned long repeat, unsigned long pin, unsigned long value, unsigned int length) {
- platform_gpio_mode(pin, PLATFORM_GPIO_OUTPUT, PLATFORM_GPIO_FLOAT);
- Protocol p = proto[protocol_id-1];
- for (int nRepeat = 0; nRepeat < repeat; nRepeat++) {
- for (int i = length-1; i >= 0; i--) {
- if (value & (1L << i))
- transmit(p.one, p.invertedSignal, pulse_length, pin);
- else
- transmit(p.zero, p.invertedSignal, pulse_length, pin);
- }
- transmit(p.syncFactor, p.invertedSignal, pulse_length, pin);
- }
- }
- static int rfswitch_send( lua_State *L )
- {
- unsigned int protocol_id = luaL_checkinteger( L, 1 );
- unsigned int pulse_length = luaL_checkinteger( L, 2 );
- unsigned int repeat = luaL_checkinteger( L, 3 );
- unsigned int pin = luaL_checkinteger( L, 4 );
- unsigned long value = luaL_checkinteger( L, 5 );
- unsigned long length = luaL_checkinteger( L, 6 );
- send(protocol_id, pulse_length, repeat, pin, value, length);
- return 0;
- }
- // Module function map
- LROT_BEGIN(rfswitch, NULL, 0)
- LROT_FUNCENTRY( send, rfswitch_send )
- LROT_END(rfswitch, NULL, 0)
- NODEMCU_MODULE(RFSWITCH, "rfswitch", rfswitch, NULL);
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