From a497c0f3174f0d5f3b01fd7d36d18e5554902892 Mon Sep 17 00:00:00 2001
From: sawinglogz <3787776-sawinglogz@users.noreply.gitlab.com>
Date: Fri, 7 Feb 2020 13:54:28 -0500
Subject: [PATCH] Update Viatom loader based on newly observed O2Ring data in
 the header.

---
 oscar/SleepLib/loader_plugins/viatom_loader.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/oscar/SleepLib/loader_plugins/viatom_loader.cpp b/oscar/SleepLib/loader_plugins/viatom_loader.cpp
index fdd41e7b..d6570c10 100644
--- a/oscar/SleepLib/loader_plugins/viatom_loader.cpp
+++ b/oscar/SleepLib/loader_plugins/viatom_loader.cpp
@@ -297,10 +297,12 @@ bool ViatomFile::ParseHeader()
     //int spo2_avg = header[17];
     //int spo2_min = header[18];
     //int spo2_3pct = header[19];  // number of events
-    //int spo2_4pct = header[20];  // number of events
-    CHECK_VALUE(header[21], 0);
-    //int time_under_90pct = header[22];  // in seconds
-    CHECK_VALUE(header[23], 0);
+    int spo2_4pct = header[20];  // number of events
+    if (header[21] > spo2_4pct) {
+        //CHECK_VALUE(header[21], 0);  // sometimes nonzero; maybe spo2_5pct or something like that?
+        UNEXPECTED_VALUE(header[21], "< drops over 4%");
+    }
+    //int time_under_90pct = header[22] | (header[23] << 8);  // in seconds
     //int events_under_90pct = header[24];  // number of distinct events
     //float o2_score = header[25] * 0.1;
     CHECK_VALUE(header[26], 0);