Log TX power after limits applyng and store it in config (#7065)

* Log and save in config lora tx_power after limits applyng

* Log and save in config lora tx_power after limits applyng

* Trunk fmt

* Remove duplicate logic

---------

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/mesh/LR11x0Interface.cpp

@@ -71,10 +71,7 @@ template <typename T> bool LR11x0Interface<T>::init()
 
     RadioLibInterface::init();
 
-    limitPower();
-
-    if (power > LR1110_MAX_POWER) // Clamp power to maximum defined level
-        power = LR1110_MAX_POWER;
+    limitPower(LR1110_MAX_POWER);
 
     if ((power > LR1120_MAX_POWER) &&
         (config.lora.region == meshtastic_Config_LoRaConfig_RegionCode_LORA_24)) { // clamp again if wide freq range

src/mesh/RF95Interface.cpp

@@ -122,10 +122,7 @@ bool RF95Interface::init()
     power = dacDbValues.db;
 #endif
 
-    limitPower();
-
-    if (power > RF95_MAX_POWER) // This chip has lower power limits than some
-        power = RF95_MAX_POWER;
+    limitPower(RF95_MAX_POWER);
 
     iface = lora = new RadioLibRF95(&module);
 

src/mesh/RadioInterface.cpp

@@ -611,7 +611,7 @@ uint32_t RadioInterface::computeSlotTimeMsec()
  * Some regulatory regions limit xmit power.
  * This function should be called by subclasses after setting their desired power.  It might lower it
  */
-void RadioInterface::limitPower()
+void RadioInterface::limitPower(int8_t loraMaxPower)
 {
     uint8_t maxPower = 255; // No limit
 
@@ -628,6 +628,13 @@ void RadioInterface::limitPower()
         power -= TX_GAIN_LORA;
     }
 
+    if (power > loraMaxPower) // Clamp power to maximum defined level
+        power = loraMaxPower;
+
+    if (TX_GAIN_LORA == 0) { // Setting power in config with defined TX_GAIN_LORA will cause decreasing power on each reboot
+        config.lora.tx_power = power; // Set limited power in config
+    }
+
     LOG_INFO("Final Tx power: %d dBm", power);
 }
 

src/mesh/RadioInterface.h

@@ -230,7 +230,7 @@ class RadioInterface
      * Some regulatory regions limit xmit power.
      * This function should be called by subclasses after setting their desired power.  It might lower it
      */
-    void limitPower();
+    void limitPower(int8_t MAX_POWER);
 
     /**
      * Save the frequency we selected for later reuse.

src/mesh/STM32WLE5JCInterface.cpp

@@ -25,10 +25,7 @@ bool STM32WLE5JCInterface::init()
 
     lora.setRfSwitchTable(rfswitch_pins, rfswitch_table);
 
-    limitPower();
-
-    if (power > STM32WLx_MAX_POWER) // This chip has lower power limits than some
-        power = STM32WLx_MAX_POWER;
+    limitPower(STM32WLx_MAX_POWER);
 
     int res = lora.begin(getFreq(), bw, sf, cr, syncWord, power, preambleLength, tcxoVoltage);
 

src/mesh/SX126xInterface.cpp

@@ -69,10 +69,7 @@ template <typename T> bool SX126xInterface<T>::init()
 
     RadioLibInterface::init();
 
-    limitPower();
-
-    if (power > SX126X_MAX_POWER) // Clamp power to maximum defined level
-        power = SX126X_MAX_POWER;
+    limitPower(SX126X_MAX_POWER);
 
     int res = lora.begin(getFreq(), bw, sf, cr, syncWord, power, preambleLength, tcxoVoltage, useRegulatorLDO);
     // \todo Display actual typename of the adapter, not just `SX126x`

src/mesh/SX128xInterface.cpp

@@ -62,10 +62,7 @@ template <typename T> bool SX128xInterface<T>::init()
 
     RadioLibInterface::init();
 
-    limitPower();
-
-    if (power > SX128X_MAX_POWER) // This chip has lower power limits than some
-        power = SX128X_MAX_POWER;
+    limitPower(SX128X_MAX_POWER);
 
     preambleLength = 12; // 12 is the default for this chip, 32 does not RX at all