#1 Add DHT22 room temperature sensor

README.md

@@ -28,6 +28,13 @@ Currently supporting:
 | `12` GPIO18 | `s` |
 | `01` 3.3V | `middle` |
 
+| Raspberry Pi pin | DHT22 temperature sensor pin |
+| - | - |
+| `17` 3.3V | `1` VCC |
+| `07` GPIO4 | `2` Data |
+| `-` Not connected | `3` Not connected |
+| `20` Ground | `4` Ground |
+
 ## Software
 
 * Install `LIRC`: `sudo apt install lirc`
@@ -38,6 +45,18 @@ Currently supporting:
 * In the Home app on your iOS device, add a new accessory with the code: `00102003`
 * To control a Dyson Hot + Cool AM09 fan heater, run with the `-dyson` flag: `go run homekit-daikin-infrared.go -dyson`
 
+### With a DHT22 temperature sensor
+
+**Notes**:
+
+* Building on macOS no longer works due to the [go-dht](https://github.com/d2r2/go-dht) library
+* After running on a Raspberry pi with `sudo` to access the DHT22 via GPIO the `./db` directory will be owned by the `root` user
+
+**Build and run**
+
+* Build on the Raspberry Pi: `go build homekit-daikin-infrared.go`
+* Run the executable: `sudo /usr/local/go/bin/go run homekit-daikin-infrared.go -temperaturePin 4`
+
 ### LIRC
 
 To detect IR codes, run: `mode2`

go.mod

@@ -7,6 +7,10 @@ require github.com/brutella/hap v0.0.15
 require (
 	github.com/brutella/dnssd v1.2.1 // indirect
 	github.com/chbmuc/lirc v0.0.0-20150702183631-f5796a80dd2b // indirect
+	github.com/d2r2/go-dht v0.0.0-20200119175940-4ba96621a218 // indirect
+	github.com/d2r2/go-logger v0.0.0-20210606094344-60e9d1233e22 // indirect
+	github.com/d2r2/go-shell v0.0.0-20211022052110-f591c27e3e2e // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/go-chi/chi v1.5.4 // indirect
 	github.com/miekg/dns v1.1.1 // indirect
 	github.com/tadglines/go-pkgs v0.0.0-20210623144937-b983b20f54f9 // indirect

go.sum

@@ -4,8 +4,16 @@ github.com/brutella/hap v0.0.15 h1:XrGBWkUtlQp2ZnjpaQVAUAAPnnI7BFeqOODdCXcEU1g=
 github.com/brutella/hap v0.0.15/go.mod h1:bpOEXdJ80ZI2lphDz+jdO0RoyQOn3tWeBDhts98sYF4=
 github.com/chbmuc/lirc v0.0.0-20150702183631-f5796a80dd2b h1:i8K874dgs0m4A98xPutUOAsxYCQxXvEeaW986Wv5vQY=
 github.com/chbmuc/lirc v0.0.0-20150702183631-f5796a80dd2b/go.mod h1:9zpQpkg+zE2TAzAEgMAwdr0bTwjdj4kcHo9yNCVK770=
+github.com/d2r2/go-dht v0.0.0-20200119175940-4ba96621a218 h1:z3u7ZAkBvqHD2zaECn0qd1BwMCTiAYcQjFdU8vflVHo=
+github.com/d2r2/go-dht v0.0.0-20200119175940-4ba96621a218/go.mod h1:AzSqP4S4/6pINOKg3VC79WC7YY3zskQcrXMFzphCry0=
+github.com/d2r2/go-logger v0.0.0-20210606094344-60e9d1233e22 h1:nO+SY4KOMsF/LsZ5EtbSKhiT3M6sv/igo2PEru/xEHI=
+github.com/d2r2/go-logger v0.0.0-20210606094344-60e9d1233e22/go.mod h1:eSx+YfcVy5vCjRZBNIhpIpfCGFMQ6XSOSQkDk7+VCpg=
+github.com/d2r2/go-shell v0.0.0-20211022052110-f591c27e3e2e h1:6rbw4kecquuE5mELvn9DJqrFfTLkeITQSkv8chVAX2Q=
+github.com/d2r2/go-shell v0.0.0-20211022052110-f591c27e3e2e/go.mod h1:yqtlOXB0bWzWgM4wZ9BdZ75OmXSiFYSKrZ3TZlPaePQ=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-chi/chi v1.5.4 h1:QHdzF2szwjqVV4wmByUnTcsbIg7UGaQ0tPF2t5GcAIs=
 github.com/go-chi/chi v1.5.4/go.mod h1:uaf8YgoFazUOkPBG7fxPftUylNumIev9awIWOENIuEg=
 github.com/miekg/dns v1.1.1 h1:DVkblRdiScEnEr0LR9nTnEQqHYycjkXW9bOjd+2EL2o=

homekit-daikin-infrared.go

@@ -5,6 +5,7 @@ import (
 	"github.com/brutella/hap/accessory"
 	"github.com/brutella/hap/characteristic"
 	"github.com/chbmuc/lirc"
+	"github.com/d2r2/go-dht"
 
 	"context"
 	"flag"
@@ -15,8 +16,10 @@ import (
 	"os/signal"
 	"strconv"
 	"syscall"
+	"time"
 )
 
+var acc *accessory.Heater
 var currentFanSpeed float64
 var currentHeaterCoolerState int
 var currentHeatingThresholdTemperature float64
@@ -28,10 +31,27 @@ var ir *lirc.Router
 var lircName string
 var fanSpeed *characteristic.RotationSpeed
 var swingMode *characteristic.SwingMode
+var temperaturePin int
+
+func readTemperature() {
+	if temperaturePin != 0 {
+		for {
+			temperature, humidity, retried, err := dht.ReadDHTxxWithRetry(dht.DHT22, temperaturePin, false, 10)
+			if err != nil {
+				log.Println(fmt.Sprintf("Failed to get temperature with error: %s", err))
+			} else {
+				log.Println(fmt.Sprintf("Temperature = %f°C, Humidity = %f% (retried %d times)", temperature, humidity, retried))
+				acc.Heater.CurrentTemperature.SetValue(float64(temperature))
+			}
+			time.Sleep(5 * time.Second)
+		}
+	}
+}
 
 func init() {
 	flag.BoolVar(&developmentMode, "dev", false, "development mode, so ignore LIRC setup")
 	flag.BoolVar(&dyson, "dyson", false, "Dyson AM09 mode")
+	flag.IntVar(&temperaturePin, "temperaturePin", 0, "tempearture sensor GPIO pin, an int")
 	flag.Parse()
 
 	// Initialize with path to lirc socket
@@ -41,6 +61,25 @@ func init() {
 	}
 	ir = lircIr
 
+	// Create the heater accessory.
+	info := accessory.Info{
+		Name: "Daikin air conditioner",
+		SerialNumber: "FTXS50KAVMA",
+		Manufacturer: "Daikin",
+		Model: "FTXS50KAVMA",
+		Firmware: "1.0.0",
+	}
+	lircName = "daikin"
+
+	if dyson {
+		info.Name = "Dyson Hot+Cool"
+		info.SerialNumber = "AM09"
+		info.Manufacturer = "Dyson"
+		info.Model = "AM09"
+		lircName = "dyson-am09"
+	}
+	acc = accessory.NewHeater(info)
+
 	// Store the data in the "./db" directory.
 	fs = hap.NewFsStore("./db")
 
@@ -83,23 +122,6 @@ func sendLircCommand(command string) {
 }
 
 func main() {
-	info := accessory.Info{
-		Name: "Daikin air conditioner",
-		SerialNumber: "FTXS50KAVMA",
-		Manufacturer: "Daikin",
-		Model: "FTXS50KAVMA",
-		Firmware: "1.0.0",
-	}
-	lircName = "daikin"
-
-	if dyson {
-		info.Name = "Dyson Hot+Cool"
-		info.SerialNumber = "AM09"
-		info.Manufacturer = "Dyson"
-		info.Model = "AM09"
-		lircName = "dyson-am09"
-	}
-
 	log.Println(fmt.Sprintf(
 		"Starting up %s, state: %d, temperature: %f, fan: %f, swing mode: %d",
 		lircName,
@@ -109,34 +131,30 @@ func main() {
 		currentSwingMode,
 	))
 
-	// Create the heater accessory.
-	a := accessory.NewHeater(info)
-
-	// TODO: read room temperature from a sensor
-	// a.Heater.CurrentTemperature.SetValue(19)
-
-	a.Heater.TargetHeaterCoolerState.SetValue(currentHeaterCoolerState)
+	// Set target state
+	acc.Heater.TargetHeaterCoolerState.SetValue(currentHeaterCoolerState)
 
 	// Set target temperature
-	a.Heater.HeatingThresholdTemperature.SetValue(currentHeatingThresholdTemperature)
-	a.Heater.HeatingThresholdTemperature.SetStepValue(1.0)
-	a.Heater.HeatingThresholdTemperature.SetMinValue(18)
-	a.Heater.HeatingThresholdTemperature.SetMaxValue(26)
+	acc.Heater.HeatingThresholdTemperature.SetValue(currentHeatingThresholdTemperature)
+	acc.Heater.HeatingThresholdTemperature.SetStepValue(1.0)
+	acc.Heater.HeatingThresholdTemperature.SetMinValue(18)
+	acc.Heater.HeatingThresholdTemperature.SetMaxValue(26)
 	if dyson {
-		a.Heater.HeatingThresholdTemperature.SetMinValue(1)
-		a.Heater.HeatingThresholdTemperature.SetMaxValue(37)
+		acc.Heater.HeatingThresholdTemperature.SetMinValue(1)
+		acc.Heater.HeatingThresholdTemperature.SetMaxValue(37)
 	}
 
-	a.Heater.Active.OnValueRemoteUpdate(func(on int) {
+	acc.Heater.Active.OnValueRemoteUpdate(func(on int) {
 		if on == 1 {
 			log.Println("Sending power on command")
 			powerOnCommand := fmt.Sprintf("%s POWER_ON", lircName)
 			if currentHeaterCoolerState == 1 && dyson == false {
 				powerOnCommand = fmt.Sprintf("%s POWER_ON_HEAT", lircName)
 				currentHeatingThresholdTemperature = 25.0
+				acc.Heater.HeatingThresholdTemperature.SetValue(currentHeatingThresholdTemperature)
 			}
-			a.Heater.HeatingThresholdTemperature.SetValue(currentHeatingThresholdTemperature)
-			a.Heater.TargetHeaterCoolerState.SetValue(currentHeaterCoolerState)
+			acc.Heater.HeatingThresholdTemperature.SetValue(currentHeatingThresholdTemperature)
+			acc.Heater.TargetHeaterCoolerState.SetValue(currentHeaterCoolerState)
 			fanSpeed.SetValue(currentFanSpeed)
 			swingMode.SetValue(currentSwingMode)
 			sendLircCommand(powerOnCommand)
@@ -146,7 +164,7 @@ func main() {
 		}
 	})
 
-	a.Heater.HeatingThresholdTemperature.OnValueRemoteUpdate(func(value float64) {
+	acc.Heater.HeatingThresholdTemperature.OnValueRemoteUpdate(func(value float64) {
 		state := "AUTO"
 		if currentHeaterCoolerState == 1 {
 			state = "HEAT"
@@ -167,7 +185,7 @@ func main() {
 		fs.Set("currentHeatingThresholdTemperature", []byte(fmt.Sprintf("%d", int(currentHeatingThresholdTemperature))))
 	})
 
-	a.Heater.TargetHeaterCoolerState.OnValueRemoteUpdate(func(value int) {
+	acc.Heater.TargetHeaterCoolerState.OnValueRemoteUpdate(func(value int) {
 		state := "AUTO"
 		if value == 1 {
 			state = "HEAT"
@@ -212,7 +230,7 @@ func main() {
 		currentFanSpeed = percentageToSpeed
 		fs.Set("currentFanSpeed", []byte(fmt.Sprintf("%d", int(currentFanSpeed))))
 	})
-	a.Heater.AddC(fanSpeed.C)
+	acc.Heater.AddC(fanSpeed.C)
 
 	// Add swing mode
 	swingMode = characteristic.NewSwingMode()
@@ -229,10 +247,10 @@ func main() {
 		currentSwingMode = value
 		fs.Set("currentSwingMode", []byte(fmt.Sprintf("%d", currentSwingMode)))
 	})
-	a.Heater.AddC(swingMode.C)
+	acc.Heater.AddC(swingMode.C)
 
 	// Create the hap server.
-	server, err := hap.NewServer(fs, a.A)
+	server, err := hap.NewServer(fs, acc.A)
 	if err != nil {
 		// stop if an error happens
 		log.Panic(err)
@@ -254,6 +272,9 @@ func main() {
 		cancel()
 	}()
 
+	// Read room temperature from a DHT22 temperature sensor
+	go readTemperature()
+
 	// Run the server.
 	server.ListenAndServe(ctx)
 }