/
environment.go
76 lines (61 loc) · 1.41 KB
/
environment.go
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package board
import (
"github.com/bzzzm/commodity-brain/pkg/db"
"github.com/bzzzm/commodity-brain/pkg/utils"
"go.etcd.io/bbolt"
"go.uber.org/zap"
"time"
)
const (
EnvReg = 0xa1
EnvDataLen = 12
TemperatureKey = "env_temp"
PressureKey = "env_press"
)
func (b CommodityBoard) SyncEnv(t time.Duration) {
buf := make([]byte, EnvDataLen)
tick := time.Tick(t)
var err error
var temperature, pressure, humidity float32
var start time.Time
zap.S().Debugf("SyncEnv started")
for {
select {
case <-tick:
// read from i2c
b.mux.Lock()
start = time.Now()
err = b.Dev.Tx([]byte{EnvReg}, buf)
if err != nil {
b.ec <- err
continue
}
b.mux.Unlock()
// convert to floats
temperature = utils.Float32FromBytes(buf[0:4])
pressure = utils.Float32FromBytes(buf[4:8])
humidity = utils.Float32FromBytes(buf[8:])
// update db
err = b.db.Update(func(tx *bbolt.Tx) error {
bucket := tx.Bucket([]byte(db.BoardBucket))
err = bucket.Put([]byte(TemperatureKey), buf[0:4])
if err != nil {
return err
}
err = bucket.Put([]byte(PressureKey), buf[4:8])
if err != nil {
return err
}
return nil
})
if err != nil {
b.ec <- err
continue
}
zap.S().Debugf("SyncEnv finished in %v - %v C; %v ??; %v %%", time.Now().Sub(start), temperature, pressure, humidity)
case <-b.ctx.Done():
zap.S().Debugf("SyncEnv stopped")
return
}
}
}