From 74bf90d7c09687d72305f1e77be5d32b2b49ecee Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?S=C3=B8ren=20Rasmussen?= Date: Tue, 10 Aug 2021 23:29:24 +0200 Subject: [PATCH] Initial import --- .editorconfig | 16 +++ .gitignore | 1 + README.md | 60 +++++++++ cmd/fermentord/main.go | 65 ++++++++++ go.mod | 10 ++ go.sum | 273 +++++++++++++++++++++++++++++++++++++++++ internal/dal/db.go | 36 ++++++ internal/hw/gpio.go | 59 +++++++++ pkg/onewire/ds18b20.go | 54 ++++++++ 9 files changed, 574 insertions(+) create mode 100644 .editorconfig create mode 100644 .gitignore create mode 100644 README.md create mode 100644 cmd/fermentord/main.go create mode 100644 go.mod create mode 100644 go.sum create mode 100644 internal/dal/db.go create mode 100644 internal/hw/gpio.go create mode 100644 pkg/onewire/ds18b20.go diff --git a/.editorconfig b/.editorconfig new file mode 100644 index 0000000..6d84739 --- /dev/null +++ b/.editorconfig @@ -0,0 +1,16 @@ +root = true + +[*] +indent_style = tab +indent_size = 4 +end-of_line = lf +charset = utf-8 +trim_trailing_whitespace = true +insert_final_newline = true + +[*.md] +trim_trailing_whitespace = false + +[*.{conf,hcl,json,xml,yml}] +indent_style = space +indent_size = 2 diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..57872d0 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +/vendor/ diff --git a/README.md b/README.md new file mode 100644 index 0000000..2029c1a --- /dev/null +++ b/README.md @@ -0,0 +1,60 @@ +# fermentord + +Control the temperature of your fermentation process. + +# Epics + +## Heater/Cooler + +| Persona | Description | +|----------|--------------------------------------------------------------------------------| +| Brewer | The person responsible for the wort and the fermentation process | +| Operator | The person responsible for the fermentation tank and the system controlling it | + +*As a brewer I need to maintain the wort at a specific temperature so that my fermentation process is predictable* +*As an operator I need an alert if the system can't maintain the temperature, so that I may correct the problem* + +## Ambient temperature + +* Ambient temperature +* Case temperature +* Wort temperature +* Wort gravity + +# User stories + +## Acceptance criteria + +* Given the wort is at or above the requested temperature and the heater is running then stop the heater +* Given the wort is above the requested temperature and the heater is not running then start the cooler +* Given the wort is above the requested temperature + +* Given the wort is too cold and the cooler is running then stop the cooler +* Given the wort is too cold and the cooler is not running then start the heater + +* Given the cooler is running +* Given the cooler is running when then the heater may not start +* Given the heater is running then the cooler may not start +* Given the temperature is + +# Data logging + +* Ambient temperature +* Case temperature +* Wort temperature +* Wort gravity + +* Data is stored in sqlite3 +* Data is scraped and stored in PostgreSQL +* Data is removed from sqlite3 when confirmed in PostgreSQL + +# Metrics + +Prometheus metrics + +* Ambient temperature +* Case temperature +* Wort temperature +* Wort gravity +* Heater state +* Cooler state diff --git a/cmd/fermentord/main.go b/cmd/fermentord/main.go new file mode 100644 index 0000000..60a78af --- /dev/null +++ b/cmd/fermentord/main.go @@ -0,0 +1,65 @@ +package main + +import ( + "git.joco.dk/sng/fermentord/internal/dal" + "git.joco.dk/sng/fermentord/internal/hw" + "git.joco.dk/sng/fermentord/pkg/onewire" + "github.com/rs/zerolog/log" + "github.com/spf13/viper" +) + +type configuration struct { + Db struct { + Dsn string `mapstructure:"dsn"` + } `mapstructure:"db"` + Temperature struct { + WortSensor string `mapstructure:"wort_sensor"` + FridgeSensor string `mapstructure:"fridge_sensor"` + AmbientSensor string `mapstructure:"ambient_sensor"` + } `mapstructure:"temperature"` +} + +var ( + config configuration +) + +func main() { + // Configuration + viper.SetEnvPrefix("FERMENTORD") + viper.AutomaticEnv() + viper.SetDefault("db.dsn", "./fermentord.db") + viper.AddConfigPath("/etc") + viper.SetConfigName("fermentord") + viper.SetConfigType("hcl") + viper.Unmarshal(&config) + + // Database + log.Info().Str("dsn", config.Db.Dsn).Msg("Initializing DB") + if dal, err := dal.NewDAL(config.Db.Dsn); err != nil { + log.Fatal().Err(err).Msg("Error initializing DB") + } else { + dal.Initialize() + defer dal.Close() + } + + // GPIO + log.Info().Msg("Initializing GPIO") + if gpio, err := hw.NewGpio(); err != nil { + log.Fatal().Err(err).Send() + } else { + defer gpio.Close() + } + + // TODO Temperature sensors + sensors, err := onewire.Sensors() + if err != nil { + log.Fatal().Err(err).Msg("Error initializing 1-wire sensors") + } + for _, sensor := range sensors { + t, err := onewire.Temperature(sensor) + } + + // TODO Temperature sensor calculation to trigger cooler/heater + + // TODO Read values from +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..527cc39 --- /dev/null +++ b/go.mod @@ -0,0 +1,10 @@ +module git.joco.dk/sng/fermentord + +go 1.16 + +require ( + github.com/rs/zerolog v1.23.0 + github.com/spf13/viper v1.3.2 + github.com/warthog618/gpiod v0.6.0 + modernc.org/sqlite v1.12.0 +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..cb31747 --- /dev/null +++ b/go.sum @@ -0,0 +1,273 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= +github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= +github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod 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h1:WyIDpEpAIx4Hel6q/Pcgj/VhaQV5XPJ2I6ryIYbjnpc= +modernc.org/z v1.0.1/go.mod h1:8/SRk5C/HgiQWCgXdfpb+1RvhORdkz5sw72d3jjtyqA= +sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o= diff --git a/internal/dal/db.go b/internal/dal/db.go new file mode 100644 index 0000000..d919e65 --- /dev/null +++ b/internal/dal/db.go @@ -0,0 +1,36 @@ +package dal + +import ( + "database/sql" + + _ "modernc.org/sqlite" +) + +type DAL struct { + db *sql.DB +} + +func NewDAL(dsn string) (*DAL, error) { + var err error + dal := &DAL{} + + dal.db, err = sql.Open("sqlite", dsn) + if err != nil { + return nil, err + } + + return dal, nil +} + +func (dal *DAL) Close() error { + return dal.db.Close() +} + +func (dal *DAL) Initialize() error { + // TODO + return nil +} + +func (dal *DAL) SaveReading() { + // TODO +} diff --git a/internal/hw/gpio.go b/internal/hw/gpio.go new file mode 100644 index 0000000..edbb218 --- /dev/null +++ b/internal/hw/gpio.go @@ -0,0 +1,59 @@ +package hw + +import ( + "github.com/warthog618/gpiod" +) + +const ( + pinCoolerPower = 20 + pinFanPower = 16 + pinHeaterPower = 21 + + off = 0 + on = 1 +) + +type Gpio struct { + chip *gpiod.Chip + coolerPower *gpiod.Line + fanPower *gpiod.Line + heaterPower *gpiod.Line +} + +func NewGpio() (*Gpio, error) { + var err error + p := &Gpio{} + + p.chip, err = gpiod.NewChip("gpiochip0", gpiod.WithConsumer("fermentord")) + if err != nil { + return nil, err + } + + p.coolerPower, err = p.chip.RequestLine(pinCoolerPower, gpiod.AsOutput(1)) + if err != nil { + return nil, err + } + + p.fanPower, err = p.chip.RequestLine(pinFanPower, gpiod.AsOutput(1)) + if err != nil { + return nil, err + } + + p.heaterPower, err = p.chip.RequestLine(pinHeaterPower, gpiod.AsOutput(1)) + if err != nil { + return nil, err + } + + return p, nil +} + +func (p *Gpio) Close() { + p.coolerPower.SetValue(off) + p.fanPower.SetValue(off) + p.heaterPower.SetValue(off) + + p.heaterPower.Close() + p.fanPower.Close() + p.coolerPower.Close() + p.chip.Close() +} diff --git a/pkg/onewire/ds18b20.go b/pkg/onewire/ds18b20.go new file mode 100644 index 0000000..58b7267 --- /dev/null +++ b/pkg/onewire/ds18b20.go @@ -0,0 +1,54 @@ +package onewire + +import ( + "errors" + "io/ioutil" + "strconv" + "strings" +) + +var ( + ErrReadSensor = errors.New("Failed to read sensor temperature") +) + +// Sensors returns an array of connected sensor IDs. +func Sensors() ([]string, error) { + data, err := ioutil.ReadFile("/sys/bus/w1/devices/w1_bus_master1/w1_master_slaves") + if err != nil { + return nil, err + } + + sensors := strings.Split(string(data), "\n") + if len(sensors) > 0 { + sensors = sensors[:len(sensors)-1] + } + + return sensors, nil +} + +// Temperature returns the temperature of the specified sensor. +func Temperature(sensor string) (float64, error) { + sensorPath := "/sys/bus/w1/devices/" + sensor + "/w1_slave" + data, err := ioutil.ReadFile(sensorPath) + if err != nil { + return 0.0, err + } + + raw := string(data) + + if !strings.Contains(raw, " YES") { + return 0.0, ErrReadSensor + } + + i := strings.LastIndex(raw, "t=") + if i == -1 { + return 0.0, ErrReadSensor + } + + c, err := strconv.ParseFloat(raw[i+2:len(raw)-1], 64) + if err != nil { + return 0.0, err + } + + return c / 1000.0, nil +}