homebridge-gpio-switch-dualrelay

For a switch that requires two pins, and requires them to be active for some amount of time.

(lent from StefanoSGTECH/homebridge-gpioswitchdual-master who took his package from github so I couldn't fork it.)

Useful to control relay switch from Siri.

It use on/off library to achieve that.

Requirements

• Homebridge - HomeKit support for the impatient

Installation

1. Install Homebridge using npm install -g homebridge
2. Install this plugin npm install -g homebridge-gpioswitchdual
3. Update your configuration file - see sample-config.json in this repo

Configuration

Example config.json

{
  "accessories": [
    {
      "accessory": "GPIOSWITCHDUALL",
        "name": "my switch",
        "pin": 7,
        "pin2": 8,
		"stato": false
    }
  ]
}

Pin Configuration

This couldn't have been more confusing. Raspberry Pi's physical pins are not laid out in any particular logical order. Most of them are given the names of the pins of the Broadcom chip it uses (BCM2835). There isn't even a logical relationship between the physical layout of the Raspberry Pi pin header and the Broadcom chip's pinout. The OS recognizes the names of the Broadcom chip and has nothing to do with the physical pin layout on the Pi. To add to the fun, the specs for the Broadcom chip are nearly impossible to get!

P1 - 3.3v	1	2	5v
I2C SDA	3	4	--
I2C SCL	5	6	Ground
GPIO	7	8	TX
--	9	10	RX
GPIO	11	12	GPIO
GPIO	13	14	--
GPIO	15	16	GPIO
--	17	18	GPIO
SPI MOSI	19	20	--
SPI MISO	21	22	GPIO
SPI SCLK	23	24	SPI CE0
--	25	26	SPI CE1
Model A+ and Model B+ additional pins
ID_SD	27	28	ID_SC
GPIO	29	30	--
GPIO	31	32	GPIO
GPIO	33	34	--
GPIO	35	36	GPIO
GPIO	37	38	GPIO
--	39	40	GPIO

That gives you several GPIO pins to play with: pins 7, 11, 12, 13, 15, 16, 18 and 22 (with A+ and B+ giving 29, 31, 32, 33, 35, 37, 38 and 40). You should provide these physical pin numbers to this library, and not bother with what they are called internally. Easy-peasy.