From d3ea7b0ca692b0311e5c662ff73dcdf7264c8a04 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Sun, 15 Jan 2023 15:55:38 +1100
Subject: [PATCH] SITL: added SIM_UART_LOSS parameter

---
 libraries/SITL/SITL.cpp | 7 +++++++
 libraries/SITL/SITL.h   | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/libraries/SITL/SITL.cpp b/libraries/SITL/SITL.cpp
index c5257286eb..86f5253ef5 100644
--- a/libraries/SITL/SITL.cpp
+++ b/libraries/SITL/SITL.cpp
@@ -325,6 +325,13 @@ const AP_Param::GroupInfo SIM::var_info3[] = {
 
     AP_GROUPINFO("ESC_ARM_RPM", 41, SIM,  esc_rpm_armed, 0.0f),
 
+    // @Param: UART_LOSS
+    // @DisplayName: UART byte loss percentage
+    // @Description: Sets percentage of outgoing byte loss on UARTs
+    // @Units: %
+    // @User: Advanced
+    AP_GROUPINFO("UART_LOSS", 42, SIM,  uart_byte_loss_pct, 0),
+
     AP_SUBGROUPINFO(airspeed[0], "ARSPD_", 50, SIM, SIM::AirspeedParm),
 #if AIRSPEED_MAX_SENSORS > 1
     AP_SUBGROUPINFO(airspeed[1], "ARSPD2_", 51, SIM, SIM::AirspeedParm),
diff --git a/libraries/SITL/SITL.h b/libraries/SITL/SITL.h
index f6c40dc810..45d8d45760 100644
--- a/libraries/SITL/SITL.h
+++ b/libraries/SITL/SITL.h
@@ -236,6 +236,8 @@ public:
     AP_Int16 loop_time_jitter_us;
     AP_Int32 on_hardware_output_enable_mask;  // mask of output channels passed through to actual hardware
 
+    AP_Float uart_byte_loss_pct;
+
 #ifdef SFML_JOYSTICK
     AP_Int8 sfml_joystick_id;
     AP_Int8 sfml_joystick_axis[8];