From 1dcf70bbaced48cd2be98e50d5cef66f41c54e23 Mon Sep 17 00:00:00 2001
From: Jye <14170229+JyeSmith@users.noreply.github.com>
Date: Mon, 1 Apr 2024 13:13:28 +1000
Subject: [PATCH] Fix LR1121 binding (#2617)

* fix LR1121 binding

* remove magic
---
 src/include/common.h | 1 +
 src/src/tx_main.cpp  | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/src/include/common.h b/src/include/common.h
index 43b2f633c0..66084389b0 100644
--- a/src/include/common.h
+++ b/src/include/common.h
@@ -247,6 +247,7 @@ extern SX127xDriver Radio;
 #elif defined(RADIO_LR1121)
 #define RATE_MAX 14
 #define RATE_BINDING RATE_LORA_50HZ
+#define RATE_DUALBAND_BINDING 9 // 2.4GHz 50Hz
 
 extern LR1121Driver Radio;
 
diff --git a/src/src/tx_main.cpp b/src/src/tx_main.cpp
index 6e435775f1..701e093041 100644
--- a/src/src/tx_main.cpp
+++ b/src/src/tx_main.cpp
@@ -976,6 +976,14 @@ static void EnterBindingMode()
   // Start attempting to bind
   // Lock the RF rate and freq while binding
   SetRFLinkRate(enumRatetoIndex(RATE_BINDING));
+
+#if defined(RADIO_LR1121)
+  FHSSuseDualBand = true;
+  expresslrs_mod_settings_s *const dualBandBindingModParams = get_elrs_airRateConfig(RATE_DUALBAND_BINDING); // 2.4GHz 50Hz
+  Radio.Config(dualBandBindingModParams->bw2, dualBandBindingModParams->sf2, dualBandBindingModParams->cr2, FHSSgetInitialGeminiFreq(),
+               dualBandBindingModParams->PreambleLen2, true, dualBandBindingModParams->PayloadLength, dualBandBindingModParams->interval, SX12XX_Radio_2);
+#endif
+
   Radio.SetFrequencyReg(FHSSgetInitialFreq());
   if (isDualRadio() && config.GetAntennaMode() == TX_RADIO_MODE_GEMINI) // Gemini mode
   {