From 776f7a9911c11f392b4b0d8cbe6d044a7b98b19b Mon Sep 17 00:00:00 2001
From: Serge Bazanski <q3k@q3k.org>
Date: Sat, 28 Sep 2024 07:36:02 +0200
Subject: [PATCH] succd: add hysteresis for high pressure safety interlock

---
 succbone/succd/process.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/succbone/succd/process.go b/succbone/succd/process.go
index 313af1d..31bc1fa 100644
--- a/succbone/succd/process.go
+++ b/succbone/succd/process.go
@@ -154,7 +154,7 @@ func (d *daemon) processOnce(_ context.Context) error {
 			d.safety.highPressure = true
 			klog.Errorf("Pressure is too high; enabling diffusion pump lockout")
 		}
-	} else {
+	} else if mbar < (1e-1)-(1e-2) {
 		if d.safety.highPressure {
 			d.safety.highPressure = false
 			klog.Infof("Pressure is low enough for diffusion pump operation; quitting diffusion pump lockout")