Fix formula to consider Bandwidth in kHz

src/mesh/RadioInterface.cpp

@@ -426,7 +426,7 @@ void RadioInterface::applyModemConfig()
     // float freq = myRegion->freqStart + ((((myRegion->freqEnd - myRegion->freqStart) / numChannels) / 2) * channel_num);
 
     // New frequency selection formula
-    float freq = myRegion->freqStart + (bw / 2) + ( channel_num * bw);
+    float freq = myRegion->freqStart + (bw / 2000) + ( channel_num * (bw / 1000));
 
     saveChannelNum(channel_num);
     saveFreq(freq + config.lora.frequency_offset);