From 1375f87163bf7b8d8fe43465d4c18f781aeed893 Mon Sep 17 00:00:00 2001
From: proddy <paul@derbyshire.nl>
Date: Sun, 4 Oct 2026 14:29:17 +0200
Subject: [PATCH] add precision to voltage in HA

---
 src/core/mqtt.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/core/mqtt.cpp b/src/core/mqtt.cpp
index 6ea9eb732..c4dffdf39 100644
--- a/src/core/mqtt.cpp
+++ b/src/core/mqtt.cpp
@@ -1318,8 +1318,9 @@ void Mqtt::add_ha_classes(JsonObject doc, const uint8_t device_type, const uint8
         break;
     case DeviceValueUOM::MV:
     case DeviceValueUOM::VOLTS:
-        doc[sc_ha] = sc_ha_measurement;
-        doc[dc_ha] = "voltage";
+        doc[sc_ha]         = sc_ha_measurement;
+        doc[dc_ha]         = "voltage";
+        doc["sug_dsp_prc"] = 2; // round to 2 decimal places
         break;
     case DeviceValueUOM::MBAR:
         doc[sc_ha] = sc_ha_measurement;