From 1b7168b7c5b12fd2f7491083211a0bf2a1ea0985 Mon Sep 17 00:00:00 2001
From: Mike Plante <82073483+MikePlante1@users.noreply.github.com>
Date: Mon, 31 Mar 2025 10:58:31 -0400
Subject: [PATCH] Round to supported rate before setting temp basal rate

---
 MinimedKit/PumpManager/MinimedPumpManager.swift | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/MinimedKit/PumpManager/MinimedPumpManager.swift b/MinimedKit/PumpManager/MinimedPumpManager.swift
index 7b67ad7..853d811 100644
--- a/MinimedKit/PumpManager/MinimedPumpManager.swift
+++ b/MinimedKit/PumpManager/MinimedPumpManager.swift
@@ -941,6 +941,10 @@ extension MinimedPumpManager: PumpManager {
         return state.pumpModel.supportedBasalRates
     }
 
+    public func roundToSupportedBasalRate(unitsPerHour: Double) -> Double {
+        return supportedBasalRates.last(where: { $0 <= unitsPerHour }) ?? 0
+    }
+
     public var supportedBolusVolumes: [Double] {
         return state.pumpModel.supportedBolusVolumes
     }
@@ -1321,13 +1325,16 @@ extension MinimedPumpManager: PumpManager {
             
             self.recents.tempBasalEngageState = .engaging
 
-            let result = session.setTempBasal(unitsPerHour, duration: duration)
-            
+            // Round to nearest supported rate
+            let rate = self.roundToSupportedBasalRate(unitsPerHour: unitsPerHour)
+
+            let result = session.setTempBasal(rate, duration: duration)
+
             switch result {
             case .success:
                 let now = self.dateGenerator()
 
-                let dose = UnfinalizedDose(tempBasalRate: unitsPerHour, startTime: now, duration: duration, insulinType: insulinType, automatic: true)
+                let dose = UnfinalizedDose(tempBasalRate: rate, startTime: now, duration: duration, insulinType: insulinType, automatic: true)
                 
                 self.recents.tempBasalEngageState = .stable