diff --git a/lockserver/saltolockserver.go b/lockserver/saltolockserver.go
index 543e12b..49911db 100644
--- a/lockserver/saltolockserver.go
+++ b/lockserver/saltolockserver.go
@@ -31,8 +31,8 @@ func calculateLRC(data []byte) byte {
 func (lock *SaltoLockServer) BuildCommand(req DoorCardRequest, checkIn, checkOut time.Time) error {
 	// helper: hh[mm]DDMMYY
 	fmtStamp := func(t time.Time) string {
-		return fmt.Sprintf("%02d%02d%02d%02d%02d",
-			t.Hour(), t.Minute(), t.Day(), int(t.Month()), t.Year()%100)
+		return fmt.Sprintf("%02d%02d%02d%02d",
+			t.Hour(), t.Day(), int(t.Month()), t.Year()%100)
 	}
 	start := fmtStamp(checkIn)
 	expiry := fmtStamp(checkOut)
@@ -151,8 +151,8 @@ func (lock *SaltoLockServer) LockSequence() error {
 		return err
 	}
 	defer conn.Close()
-	
-	reader  := bufio.NewReader(conn)
+
+	reader := bufio.NewReader(conn)
 
 	// 1. Send ENQ
 	log.Infof("Sending ENQ")
@@ -210,11 +210,11 @@ func (lock *SaltoLockServer) LockSequence() error {
 		case b1 == 'C' && b2 == 'C':
 			log.Infof("LockSequence: command response is CC (follow-up)")
 		case b1 == 'T' && b2 == 'D':
-			log.Warnf("LockSequence: command response is TD (room does not exist)")
-			return fmt.Errorf("lock response indicates room does not exist")
+			log.Warnf("LockSequence: command response is TD (room does not exist): %q", string(resp))
+			return fmt.Errorf("lock response indicates room does not exist: %q", string(resp))
 		default:
 			log.Warnf("LockSequence: unexpected command response %q", string(resp))
-			return fmt.Errorf("error encoding keycard, unexpected response")
+			return fmt.Errorf("error encoding keycard, unexpected response: %q", string(resp))
 		}
 	} else {
 		log.Warnf("LockSequence: response too short: %q", string(resp))
diff --git a/main.go b/main.go
index 83c2caa..14278cd 100644
--- a/main.go
+++ b/main.go
@@ -29,7 +29,7 @@ import (
 )
 
 const (
-	buildVersion   = "1.0.19"
+	buildVersion   = "1.0.20"
 	serviceName    = "hardlink"
 	customLayout   = "2006-01-02 15:04:05 -0700"
 	transactionUrl = "http://127.0.0.1:18181/start-transaction/"
diff --git a/release notes.md b/release notes.md
index a0d1cec..9175d7b 100644
--- a/release notes.md	
+++ b/release notes.md	
@@ -2,6 +2,9 @@
 
 builtVersion is a const in main.go
 
+#### 1.0.20 - 06 October 2025
+removed minutes from the start and expiry time in Salto lock command
+
 #### 1.0.19 - 10 September 2025
 allowed to continue if the connection to the lock server fails at startup