From 39b5a95eb4461865071cb048b8eebba2e82d39e6 Mon Sep 17 00:00:00 2001
From: Erik Brakkee <erik@brakkee.org>
Date: Tue, 26 May 2026 21:52:13 +0200
Subject: [PATCH] logging with date time format.

---
 cmd/bridge/ant.go       | 11 +++++------
 cmd/bridge/bluetooth.go |  7 +++----
 2 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/cmd/bridge/ant.go b/cmd/bridge/ant.go
index fcb1b46..1acb186 100644
--- a/cmd/bridge/ant.go
+++ b/cmd/bridge/ant.go
@@ -2,7 +2,6 @@ package main
 
 import (
 	"context"
-	"fmt"
 	"io"
 
 	"github.com/google/gousb"
@@ -35,7 +34,7 @@ func ListenForTrainer(vendorId gousb.ID, productId gousb.ID, deviceNumber uint32
 	}
 	defer drv.Close()
 
-	fmt.Println("device opened")
+	logMsg("device opened")
 
 	if err := resetAndWait(drv); err != nil {
 		panic(err)
@@ -43,15 +42,15 @@ func ListenForTrainer(vendorId gousb.ID, productId gousb.ID, deviceNumber uint32
 	if err := device.StartRxScanModeWait(drv); err != nil {
 		panic(err)
 	}
-	fmt.Println("scan mode started")
+	logMsg("scan mode started")
 
 	msgs := make(chan ant.BroadcastMessage, 100)
 	go device.DumpBroadcastMessages(context.Background(), drv, msgs)
 
-	fmt.Println("listening...")
+	logMsg("listening...")
 	for msg := range msgs {
 		if msg.DeviceNumber() != deviceNumber {
-			fmt.Printf("Received msg from ignored ant+ device %v\n", msg.DeviceNumber())
+			logPrintf("Received msg from ignored ant+ device %v\n", msg.DeviceNumber())
 			continue
 		}
 		//fmt.Printf("raw msg: device type=0x%02x device number=%d content=%x\n",
@@ -65,7 +64,7 @@ func ListenForTrainer(vendorId gousb.ID, productId gousb.ID, deviceNumber uint32
 				continue
 			}
 			cur := ant.PowerMessage(msg)
-			fmt.Printf("%v: power: %dW  cadence: %d rpm\n",
+			logPrintf("ant: %v: power: %dW  cadence: %d rpm\n",
 				msg.DeviceNumber(), cur.InstantaneousPower(), cur.InstantaneousCadence())
 			events <- Event{
 				Power:   cur.InstantaneousPower(),
diff --git a/cmd/bridge/bluetooth.go b/cmd/bridge/bluetooth.go
index fccf437..bc23d7b 100644
--- a/cmd/bridge/bluetooth.go
+++ b/cmd/bridge/bluetooth.go
@@ -2,7 +2,6 @@ package main
 
 import (
 	"encoding/binary"
-	"fmt"
 	"math"
 	"time"
 
@@ -43,7 +42,7 @@ func ExposeBluetooth(events <-chan Event) {
 		ServiceUUIDs: []bluetooth.UUID{bluetooth.New16BitUUID(0x1818)},
 	}))
 	must(adapter.DefaultAdvertisement().Start())
-	fmt.Println("BLE advertising...")
+	logMsg("BLE advertising...")
 
 	var totalRevs float64
 	var lastCompletedRev float64 // time in 1/1024s of last completed revolution
@@ -74,7 +73,7 @@ func ExposeBluetooth(events <-chan Event) {
 		binary.LittleEndian.PutUint16(payload[6:], uint16(lastCompletedRev))
 
 		powerChar.Write(payload)
-		fmt.Printf("watts: %d  rpm: %.0f  completedRevs: %.0f  lastRevTime: %.0f\n",
-			watts, rpm, completedRevs, lastCompletedRev)
+		logPrintf("bt: watts: %d  rpm: %.0f  completedRevs: %.0f  lastRevTime: %.0f processingTime: %v\n",
+			watts, rpm, completedRevs, lastCompletedRev, time.Now().Sub(now))
 	}
 }