From 2cc978470e8d765d9eec7784a835fb3ffc437f9b Mon Sep 17 00:00:00 2001
From: Giuseppe Rojas <ga.rojas3103@uniandes.edu.co>
Date: Wed, 12 Aug 2026 00:22:13 -0500
Subject: [PATCH] fix(simu): force C locale for numeric parsing in simulator
 (#7613)

---
 radio/src/targets/simu/simulib.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/radio/src/targets/simu/simulib.cpp b/radio/src/targets/simu/simulib.cpp
index 64b313739..6b6c85319 100644
--- a/radio/src/targets/simu/simulib.cpp
+++ b/radio/src/targets/simu/simulib.cpp
@@ -46,6 +46,7 @@
 #endif
 
 #include <assert.h>
+#include <clocale>
 #include <deque>
 #include <stdint.h>
 
@@ -91,6 +92,11 @@ static void hostSerialInit();
 
 void simuInit()
 {
+  // Force the C locale for numeric conversions (strtof/strtod, etc.),
+  // otherwise the simulator picks up the host locale (e.g. es_ES) which
+  // uses a comma as decimal separator and breaks Lua number parsing.
+  setlocale(LC_NUMERIC, "C");
+
 #if defined(ROTARY_ENCODER_NAVIGATION)
   rotencValue = 0;
 #endif