From 9ac6503bffa6ca578f4113c0554537a9a5dc0db6 Mon Sep 17 00:00:00 2001
From: jgromes <jan.gromes@gmail.com>
Date: Fri, 7 May 2021 07:28:01 +0200
Subject: [PATCH] [SX128x] Fixed ranging calibration table indexing (#293)

---
 src/modules/SX128x/SX1280.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/modules/SX128x/SX1280.cpp b/src/modules/SX128x/SX1280.cpp
index eb9b3e0e..4e078280 100644
--- a/src/modules/SX128x/SX1280.cpp
+++ b/src/modules/SX128x/SX1280.cpp
@@ -85,6 +85,7 @@ int16_t SX1280::startRanging(bool master, uint32_t addr) {
   RADIOLIB_ASSERT(state);
 
   // set calibration values
+  uint8_t index = (_sf >> 4) - 5;
   static const uint16_t calTable[3][6] = {
     { 10299, 10271, 10244, 10242, 10230, 10246 },
     { 11486, 11474, 11453, 11426, 11417, 11401 },
@@ -93,13 +94,13 @@ int16_t SX1280::startRanging(bool master, uint32_t addr) {
   uint16_t val = 0;
   switch(_bw) {
     case(SX128X_LORA_BW_406_25):
-      val = calTable[0][_sf];
+      val = calTable[0][index];
       break;
     case(SX128X_LORA_BW_812_50):
-      val = calTable[1][_sf];
+      val = calTable[1][index];
       break;
     case(SX128X_LORA_BW_1625_00):
-      val = calTable[2][_sf];
+      val = calTable[2][index];
       break;
     default:
       return(ERR_INVALID_BANDWIDTH);