diff --git a/config/config.go b/config/config.go
index 71bd8de..992d939 100644
--- a/config/config.go
+++ b/config/config.go
@@ -3,6 +3,7 @@ package config
 import (
 	"errors"
 	"fmt"
+	"log"
 	"strings"
 	"th7/data/config"
 	"th7/data/thermocouple"
@@ -80,7 +81,7 @@ func Load() (config.Config, error) {
 
 		tc, err := GetThermocoupleType(v.GetString(head + ".type"))
 		if err != nil {
-			fmt.Printf("%s.type=%s\n", head, v.GetString(head+".type"))
+			log.Printf("%s.type=%s\n", head, v.GetString(head+".type"))
 			return cfg, err
 		}
 
diff --git a/db/influxdb.go b/db/influxdb.go
index c309740..c3eed13 100644
--- a/db/influxdb.go
+++ b/db/influxdb.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log"
 	"os"
 	"strings"
 	"sync"
@@ -84,7 +85,7 @@ func NewInfluxDBAdapter(config config.Config) (*InfluxDBAdapter, error) {
 		`
 	_, err = adapter.client.Query(initContext, query)
 	if err != nil {
-		fmt.Println("Error initialising InfluxDB. Check details/network connection.")
+		log.Println("Error initialising InfluxDB. Check details/network connection.")
 		return &adapter, err
 	}
 
@@ -124,7 +125,7 @@ func (ad *InfluxDBAdapter) Save(channels []core.Channel) error {
 
 	// need at least 1 iteration to bother sending data to influx server
 	if logged == 0 {
-		fmt.Printf("[%s] InfluxDB: nothing to do.\n", time.Now().Format(time.DateTime))
+		log.Printf("[%s] InfluxDB: nothing to do.\n", time.Now().Format(time.DateTime))
 		return nil
 	}
 
@@ -136,7 +137,7 @@ func (ad *InfluxDBAdapter) Save(channels []core.Channel) error {
 		return err
 	}
 
-	fmt.Printf("[%s] InfluxDB: logged %d channels OK\n", time.Now().Format(time.DateTime), logged)
+	log.Printf("[%s] InfluxDB: logged %d channels OK\n", time.Now().Format(time.DateTime), logged)
 
 	return nil
 }
diff --git a/main.go b/main.go
index e97f27a..8f1425e 100644
--- a/main.go
+++ b/main.go
@@ -1,7 +1,6 @@
 package main
 
 import (
-	"fmt"
 	"log"
 	"os"
 	"os/signal"
@@ -55,7 +54,7 @@ func main() {
 	defer dbPort.Close()
 
 	color.Set(color.FgHiRed)
-	fmt.Printf("Started on: %s\n", time.Now().Format(time.DateTime))
+	log.Printf("Started on: %s\n", time.Now().Format(time.DateTime))
 	color.Unset()
 
 	// if noweb is false and HTTP/REST API is enabled then start web service
@@ -64,7 +63,7 @@ func main() {
 		go apiPort.Run()
 
 		color.Set(color.FgHiGreen)
-		fmt.Printf("TH7 API is live on http://localhost:%d/\n", cfg.API.Port)
+		log.Printf("TH7 API is live on http://localhost:%d/\n", cfg.API.Port)
 		color.Unset()
 	}
 
diff --git a/pcb/dummy.go b/pcb/dummy.go
index b681f69..01807a4 100644
--- a/pcb/dummy.go
+++ b/pcb/dummy.go
@@ -1,7 +1,7 @@
 package pcb
 
 import (
-	"fmt"
+	"log"
 	"math/rand"
 	"th7/data/pcb"
 	"time"
@@ -17,7 +17,7 @@ func NewDummyAdapter() (*DummyAdapter, error) {
 }
 
 func (d *DummyAdapter) Deinit() error {
-	fmt.Println("dummy pcb adapter deinit")
+	log.Println("dummy pcb adapter deinit")
 	return nil
 }