From 8858c71087e66391bd9f423cd7ab4b151be744fd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=B8ren=20Rasmussen?= <sr@jondahl.net>
Date: Sat, 15 Jun 2024 19:30:52 +0200
Subject: [PATCH] Handle LCD errors gracefully

---
 cmd/fermentord/loop.go  | 2 +-
 internal/lcd/hd44780.go | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/cmd/fermentord/loop.go b/cmd/fermentord/loop.go
index a7155ec..64609bf 100644
--- a/cmd/fermentord/loop.go
+++ b/cmd/fermentord/loop.go
@@ -30,7 +30,7 @@ func mainLoop(ctx context.Context, wg *sync.WaitGroup, js nats.JetStream) {
 	display, err := lcd.NewLCD(config.I2C.Bus)
 	if err != nil {
 		hub.CaptureException(err)
-		log.Fatal(err)
+		log.Printf("Error initializing LCD: %v", err)
 	}
 	defer display.Close()
 
diff --git a/internal/lcd/hd44780.go b/internal/lcd/hd44780.go
index b426cae..1b5e05b 100644
--- a/internal/lcd/hd44780.go
+++ b/internal/lcd/hd44780.go
@@ -26,6 +26,7 @@ type LCD struct {
 	chSetpoint chan float64
 	lastUpdate time.Time
 	hub        *sentry.Hub
+	isOpen     bool
 }
 
 func NewLCD(bus int) (*LCD, error) {
@@ -68,6 +69,8 @@ func NewLCD(bus int) (*LCD, error) {
 		return nil, err
 	}
 
+	p.isOpen = true
+
 	return p, nil
 
 }
@@ -175,6 +178,10 @@ func (p *LCD) Run(ctx context.Context, wg *sync.WaitGroup) {
 }
 
 func (p *LCD) update() error {
+	if !p.isOpen {
+		return nil
+	}
+
 	if time.Since(p.lastUpdate) < 3*time.Second {
 		return nil
 	}