diff --git a/cli/firmware/flash.go b/cli/firmware/flash.go
index a5e41116..aa0ecddb 100644
--- a/cli/firmware/flash.go
+++ b/cli/firmware/flash.go
@@ -227,6 +227,7 @@ func updateFirmware(board *firmwareindex.IndexBoard, commandLine []string, modul
 		return err
 	}
 	defer f.Close()
+	f.SetProgressCallback(printProgress)
 
 	// now flash the actual firmware
 	flasherOut := new(bytes.Buffer)
@@ -256,3 +257,7 @@ func updateFirmware(board *firmwareindex.IndexBoard, commandLine []string, modul
 	}
 	return nil
 }
+
+func printProgress(progress int) {
+	fmt.Printf("Flashing progress: %d%%\r", progress)
+}
diff --git a/flasher/flasher.go b/flasher/flasher.go
index cbb38a4b..ecdde7b8 100644
--- a/flasher/flasher.go
+++ b/flasher/flasher.go
@@ -52,6 +52,7 @@ type Flasher interface {
 	FlashFirmware(firmwareFile *paths.Path, flasherOut io.Writer) error
 	FlashCertificates(certificatePaths *paths.PathList, URLs []string, flasherOut io.Writer) error
 	Close() error
+	SetProgressCallback(func(progress int))
 
 	hello() error
 	write(address uint32, buffer []byte) error
diff --git a/flasher/nina.go b/flasher/nina.go
index 316b7282..1e8c9d8a 100644
--- a/flasher/nina.go
+++ b/flasher/nina.go
@@ -28,7 +28,6 @@ import (
 	"encoding/pem"
 	"fmt"
 	"io"
-	"strconv"
 	"time"
 
 	"github.com/arduino/go-paths-helper"
@@ -60,8 +59,9 @@ func NewNinaFlasher(portAddress string) (*NinaFlasher, error) {
 }
 
 type NinaFlasher struct {
-	port        serial.Port
-	payloadSize int
+	port             serial.Port
+	payloadSize      int
+	progressCallback func(int)
 }
 
 // FlashFirmware in board connected to port using data from firmwareFile
@@ -93,7 +93,7 @@ func (f *NinaFlasher) FlashFirmware(firmwareFile *paths.Path, flasherOut io.Writ
 		return err
 	}
 	logrus.Infof("Flashed all the things")
-	flasherOut.Write([]byte("Flashed all the things\n"))
+	flasherOut.Write([]byte("Flashing progress: 100%\n"))
 	return nil
 }
 
@@ -246,7 +246,11 @@ func (f *NinaFlasher) flashChunk(offset int, buffer []byte) error {
 	}
 
 	for i := 0; i < bufferLength; i += chunkSize {
-		logrus.Debugf("Flashing chunk: %s%%", strconv.Itoa((i*100)/bufferLength))
+		progress := (i * 100) / bufferLength
+		logrus.Debugf("Flashing chunk: %d%%", progress)
+		if f.progressCallback != nil {
+			f.progressCallback(progress)
+		}
 		start := i
 		end := i + chunkSize
 		if end > bufferLength {
@@ -490,3 +494,7 @@ func (f *NinaFlasher) md5sum(data []byte) error {
 
 	return nil
 }
+
+func (f *NinaFlasher) SetProgressCallback(callback func(progress int)) {
+	f.progressCallback = callback
+}
diff --git a/flasher/winc.go b/flasher/winc.go
index b94432f7..840fecce 100644
--- a/flasher/winc.go
+++ b/flasher/winc.go
@@ -28,7 +28,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"strconv"
 	"time"
 
 	"github.com/arduino/go-paths-helper"
@@ -56,8 +55,9 @@ func NewWincFlasher(portAddress string) (*WincFlasher, error) {
 }
 
 type WincFlasher struct {
-	port        serial.Port
-	payloadSize int
+	port             serial.Port
+	payloadSize      int
+	progressCallback func(int)
 }
 
 func (f *WincFlasher) FlashFirmware(firmwareFile *paths.Path, flasherOut io.Writer) error {
@@ -74,7 +74,7 @@ func (f *WincFlasher) FlashFirmware(firmwareFile *paths.Path, flasherOut io.Writ
 		return err
 	}
 	logrus.Infof("Flashed all the things")
-	flasherOut.Write([]byte("Flashed all the things\n"))
+	flasherOut.Write([]byte("Flashing progress: 100%\n"))
 	return nil
 }
 
@@ -277,7 +277,11 @@ func (f *WincFlasher) flashChunk(offset int, buffer []byte) error {
 	}
 
 	for i := 0; i < bufferLength; i += f.payloadSize {
-		logrus.Debugf("Flashing chunk: %s%%", strconv.Itoa((i*100)/bufferLength))
+		progress := ((i * 100) / bufferLength)
+		logrus.Debugf("Flashing chunk: %d%%", progress)
+		if f.progressCallback != nil {
+			f.progressCallback(progress)
+		}
 		start := i
 		end := i + f.payloadSize
 		if end > bufferLength {
@@ -461,3 +465,7 @@ func (f *WincFlasher) erase(address uint32, length uint32) error {
 	}
 	return nil
 }
+
+func (f *WincFlasher) SetProgressCallback(callback func(progress int)) {
+	f.progressCallback = callback
+}