用射频开关（315MHz）来控制灯开关。

准备

树莓派3 B一个
315M无线收发模块 315M超再生收发模板 5V 315频率
学习型315M 无线遥控插座
面包板一块
杜邦线若干

接线

把315M无线收发模块插到面包板上，用杜邦线连接

发送与接收程序

发
vim rpi-rf_send

#!/usr/bin/env python3

import argparse
import logging

from rpi_rf import RFDevice

logging.basicConfig(level=logging.INFO, datefmt='%Y-%m-%d %H:%M:%S',
                    format='%(asctime)-15s - [%(levelname)s] %(module)s: %(message)s',)

parser = argparse.ArgumentParser(description='Sends a decimal code via a 433/315MHz GPIO device')
parser.add_argument('code', metavar='CODE', type=int,
                    help="Decimal code to send")
parser.add_argument('-g', dest='gpio', type=int, default=17,
                    help="GPIO pin (Default: 17)")
parser.add_argument('-p', dest='pulselength', type=int, default=None,
                    help="Pulselength (Default: 350)")
parser.add_argument('-t', dest='protocol', type=int, default=None,
                    help="Protocol (Default: 1)")
args = parser.parse_args()

rfdevice = RFDevice(args.gpio)
rfdevice.enable_tx()

if args.protocol:
    protocol = args.protocol
else:
    protocol = "default"
if args.pulselength:
    pulselength = args.pulselength
else:
    pulselength = "default"
logging.info(str(args.code) +
             " [protocol: " + str(protocol) +
             ", pulselength: " + str(pulselength) + "]")

rfdevice.tx_code(args.code, args.protocol, args.pulselength)
rfdevice.cleanup()

接收
vim rpi-rf_receive

#!/usr/bin/env python3

import argparse
import signal
import sys
import time
import logging

from rpi_rf import RFDevice

rfdevice = None

# pylint: disable=unused-argument
def exithandler(signal, frame):
    rfdevice.cleanup()
    sys.exit(0)

logging.basicConfig(level=logging.INFO, datefmt='%Y-%m-%d %H:%M:%S',
                    format='%(asctime)-15s - [%(levelname)s] %(module)s: %(message)s', )

parser = argparse.ArgumentParser(description='Receives a decimal code via a 433/315MHz GPIO device')
parser.add_argument('-g', dest='gpio', type=int, default=27,
                    help="GPIO pin (Default: 27)")
args = parser.parse_args()

signal.signal(signal.SIGINT, exithandler)
rfdevice = RFDevice(args.gpio)
rfdevice.enable_rx()
timestamp = None
logging.info("Listening for codes on GPIO " + str(args.gpio))
while True:
    if rfdevice.rx_code_timestamp != timestamp:
        timestamp = rfdevice.rx_code_timestamp
        logging.info(str(rfdevice.rx_code) +
                     " [pulselength " + str(rfdevice.rx_pulselength) +
                     ", protocol " + str(rfdevice.rx_proto) + "]")
    time.sleep(0.01)
rfdevice.cleanup()

执行程序

将插座调至学习状态下执行以下脚本

~/gpio/rpi-rf_send 111112222

可分别设置开和关。

后续用homebridge来实现siri控制灯开关。

参考
rpi-rf