diff --git a/src/modules/SX127x/SX1272.h b/src/modules/SX127x/SX1272.h
index 337558ec..142ee174 100644
--- a/src/modules/SX127x/SX1272.h
+++ b/src/modules/SX127x/SX1272.h
@@ -118,7 +118,7 @@ class SX1272: public SX127x {
       Set to 0 to enable automatic gain control (recommended).
       \returns \ref status_codes
     */
-    int16_t begin(float freq = 915.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = RADIOLIB_SX127X_SYNC_WORD, int8_t power = 10, uint16_t preambleLength = 8, uint8_t gain = 0);
+    virtual int16_t begin(float freq = 915.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = RADIOLIB_SX127X_SYNC_WORD, int8_t power = 10, uint16_t preambleLength = 8, uint8_t gain = 0);
 
     /*!
       \brief FSK modem initialization method. Must be called at least once from Arduino sketch to initialize the module.
@@ -160,7 +160,7 @@ class SX1272: public SX127x {
       \param sf %LoRa link spreading factor to be set.
       \returns \ref status_codes
     */
-    int16_t setSpreadingFactor(uint8_t sf);
+    virtual int16_t setSpreadingFactor(uint8_t sf);
 
     /*!
       \brief Sets %LoRa link coding rate denominator. Allowed values range from 5 to 8. Only available in %LoRa mode.
@@ -317,7 +317,7 @@ class SX1272: public SX127x {
     int16_t setSpreadingFactorRaw(uint8_t newSpreadingFactor);
     int16_t setCodingRateRaw(uint8_t newCodingRate);
 
-    int16_t configFSK();
+    int16_t configFSK() override;
     void errataFix(bool rx) override;
 
 #if !RADIOLIB_GODMODE
diff --git a/src/modules/SX127x/SX1273.h b/src/modules/SX127x/SX1273.h
index 4e9dd1ed..2a2e3b5e 100644
--- a/src/modules/SX127x/SX1273.h
+++ b/src/modules/SX127x/SX1273.h
@@ -38,7 +38,7 @@ class SX1273: public SX1272 {
       Set to 0 to enable automatic gain control (recommended).
       \returns \ref status_codes
     */
-    int16_t begin(float freq = 915.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = RADIOLIB_SX127X_SYNC_WORD, int8_t power = 10, uint16_t preambleLength = 8, uint8_t gain = 0);
+    int16_t begin(float freq = 915.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = RADIOLIB_SX127X_SYNC_WORD, int8_t power = 10, uint16_t preambleLength = 8, uint8_t gain = 0) override;
 
     // configuration methods
 
@@ -47,7 +47,7 @@ class SX1273: public SX1272 {
       \param sf %LoRa link spreading factor to be set.
       \returns \ref status_codes
     */
-    int16_t setSpreadingFactor(uint8_t sf);
+    int16_t setSpreadingFactor(uint8_t sf) override;
 
     /*!
       \brief Set data.
diff --git a/src/modules/SX127x/SX1276.cpp b/src/modules/SX127x/SX1276.cpp
index 819e5188..596464fd 100644
--- a/src/modules/SX127x/SX1276.cpp
+++ b/src/modules/SX127x/SX1276.cpp
@@ -7,7 +7,7 @@ SX1276::SX1276(Module* mod) : SX1278(mod) {
 
 int16_t SX1276::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t syncWord, int8_t power, uint16_t preambleLength, uint8_t gain) {
   // execute common part
-  uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
+  const uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
   int16_t state = SX127x::begin(versions, 3, syncWord, preambleLength);
   RADIOLIB_ASSERT(state);
 
@@ -39,7 +39,7 @@ int16_t SX1276::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t sync
 
 int16_t SX1276::beginFSK(float freq, float br, float freqDev, float rxBw, int8_t power, uint16_t preambleLength, bool enableOOK) {
   // execute common part
-  uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
+  const uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
   int16_t state = SX127x::beginFSK(versions, 3, freqDev, rxBw, preambleLength, enableOOK);
   RADIOLIB_ASSERT(state);
 
diff --git a/src/modules/SX127x/SX1276.h b/src/modules/SX127x/SX1276.h
index 64dbaa3e..e3d6ea01 100644
--- a/src/modules/SX127x/SX1276.h
+++ b/src/modules/SX127x/SX1276.h
@@ -38,7 +38,7 @@ class SX1276: public SX1278 {
       Set to 0 to enable automatic gain control (recommended).
       \returns \ref status_codes
     */
-    int16_t begin(float freq = 434.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = RADIOLIB_SX127X_SYNC_WORD, int8_t power = 10, uint16_t preambleLength = 8, uint8_t gain = 0);
+    int16_t begin(float freq = 434.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = RADIOLIB_SX127X_SYNC_WORD, int8_t power = 10, uint16_t preambleLength = 8, uint8_t gain = 0) override;
 
     /*!
       \brief FSK modem initialization method. Must be called at least once from Arduino sketch to initialize the module.
@@ -52,7 +52,7 @@ class SX1276: public SX1278 {
       \param enableOOK Use OOK modulation instead of FSK.
       \returns \ref status_codes
     */
-    int16_t beginFSK(float freq = 434.0, float br = 4.8, float freqDev = 5.0, float rxBw = 125.0, int8_t power = 10, uint16_t preambleLength = 16, bool enableOOK = false);
+    int16_t beginFSK(float freq = 434.0, float br = 4.8, float freqDev = 5.0, float rxBw = 125.0, int8_t power = 10, uint16_t preambleLength = 16, bool enableOOK = false) override;
 
     // configuration methods
 
diff --git a/src/modules/SX127x/SX1277.cpp b/src/modules/SX127x/SX1277.cpp
index 758daf51..155a6f3d 100644
--- a/src/modules/SX127x/SX1277.cpp
+++ b/src/modules/SX127x/SX1277.cpp
@@ -7,7 +7,7 @@ SX1277::SX1277(Module* mod) : SX1278(mod) {
 
 int16_t SX1277::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t syncWord, int8_t power, uint16_t preambleLength, uint8_t gain) {
   // execute common part
-  uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
+  const uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
   int16_t state = SX127x::begin(versions, 3, syncWord, preambleLength);
   RADIOLIB_ASSERT(state);
 
@@ -39,7 +39,7 @@ int16_t SX1277::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t sync
 
 int16_t SX1277::beginFSK(float freq, float br, float freqDev, float rxBw, int8_t power, uint16_t preambleLength, bool enableOOK) {
   // execute common part
-  uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
+  const uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
   int16_t state = SX127x::beginFSK(versions, 3, freqDev, rxBw, preambleLength, enableOOK);
   RADIOLIB_ASSERT(state);
 
diff --git a/src/modules/SX127x/SX1277.h b/src/modules/SX127x/SX1277.h
index fe068c0d..22e68ad8 100644
--- a/src/modules/SX127x/SX1277.h
+++ b/src/modules/SX127x/SX1277.h
@@ -38,7 +38,7 @@ class SX1277: public SX1278 {
       Set to 0 to enable automatic gain control (recommended).
       \returns \ref status_codes
     */
-    int16_t begin(float freq = 434.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = RADIOLIB_SX127X_SYNC_WORD, int8_t power = 10, uint16_t preambleLength = 8, uint8_t gain = 0);
+    int16_t begin(float freq = 434.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = RADIOLIB_SX127X_SYNC_WORD, int8_t power = 10, uint16_t preambleLength = 8, uint8_t gain = 0) override;
 
     /*!
       \brief FSK modem initialization method. Must be called at least once from Arduino sketch to initialize the module.
@@ -52,7 +52,7 @@ class SX1277: public SX1278 {
       \param enableOOK Use OOK modulation instead of FSK.
       \returns \ref status_codes
     */
-    int16_t beginFSK(float freq = 434.0, float br = 4.8, float freqDev = 5.0, float rxBw = 125.0, int8_t power = 10, uint16_t preambleLength = 16, bool enableOOK = false);
+    int16_t beginFSK(float freq = 434.0, float br = 4.8, float freqDev = 5.0, float rxBw = 125.0, int8_t power = 10, uint16_t preambleLength = 16, bool enableOOK = false) override;
 
     // configuration methods
 
@@ -68,7 +68,7 @@ class SX1277: public SX1278 {
       \param sf %LoRa link spreading factor to be set.
       \returns \ref status_codes
     */
-    int16_t setSpreadingFactor(uint8_t sf);
+    int16_t setSpreadingFactor(uint8_t sf) override;
     
     /*!
       \brief Set data.
diff --git a/src/modules/SX127x/SX1278.cpp b/src/modules/SX127x/SX1278.cpp
index 141a0029..e370d0e3 100644
--- a/src/modules/SX127x/SX1278.cpp
+++ b/src/modules/SX127x/SX1278.cpp
@@ -8,7 +8,7 @@ SX1278::SX1278(Module* mod) : SX127x(mod) {
 
 int16_t SX1278::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t syncWord, int8_t power, uint16_t preambleLength, uint8_t gain) {
   // execute common part
-  uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
+  const uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
   int16_t state = SX127x::begin(versions, 3, syncWord, preambleLength);
   RADIOLIB_ASSERT(state);
 
@@ -40,7 +40,7 @@ int16_t SX1278::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t sync
 
 int16_t SX1278::beginFSK(float freq, float br, float freqDev, float rxBw, int8_t power, uint16_t preambleLength, bool enableOOK) {
   // execute common part
-  uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
+  const uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
   int16_t state = SX127x::beginFSK(versions, 3, freqDev, rxBw, preambleLength, enableOOK);
   RADIOLIB_ASSERT(state);
 
diff --git a/src/modules/SX127x/SX1278.h b/src/modules/SX127x/SX1278.h
index 1fadf64b..2c2a30c5 100644
--- a/src/modules/SX127x/SX1278.h
+++ b/src/modules/SX127x/SX1278.h
@@ -129,7 +129,7 @@ class SX1278: public SX127x {
       Set to 0 to enable automatic gain control (recommended).
       \returns \ref status_codes
     */
-    int16_t begin(float freq = 434.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = RADIOLIB_SX127X_SYNC_WORD, int8_t power = 10, uint16_t preambleLength = 8, uint8_t gain = 0);
+    virtual int16_t begin(float freq = 434.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = RADIOLIB_SX127X_SYNC_WORD, int8_t power = 10, uint16_t preambleLength = 8, uint8_t gain = 0);
 
     /*!
       \brief FSK modem initialization method. Must be called at least once from Arduino sketch to initialize the module.
@@ -143,7 +143,7 @@ class SX1278: public SX127x {
       \param enableOOK Use OOK modulation instead of FSK.
       \returns \ref status_codes
     */
-    int16_t beginFSK(float freq = 434.0, float br = 4.8, float freqDev = 5.0, float rxBw = 125.0, int8_t power = 10, uint16_t preambleLength = 16, bool enableOOK = false);
+    virtual int16_t beginFSK(float freq = 434.0, float br = 4.8, float freqDev = 5.0, float rxBw = 125.0, int8_t power = 10, uint16_t preambleLength = 16, bool enableOOK = false);
 
     /*!
       \brief Reset method. Will reset the chip to the default state using RST pin.
@@ -171,7 +171,7 @@ class SX1278: public SX127x {
       \param sf %LoRa link spreading factor to be set.
       \returns \ref status_codes
     */
-    int16_t setSpreadingFactor(uint8_t sf);
+    virtual int16_t setSpreadingFactor(uint8_t sf);
 
     /*!
       \brief Sets %LoRa link coding rate denominator. Allowed values range from 5 to 8. Only available in %LoRa mode.
@@ -329,7 +329,7 @@ class SX1278: public SX127x {
     int16_t setSpreadingFactorRaw(uint8_t newSpreadingFactor);
     int16_t setCodingRateRaw(uint8_t newCodingRate);
 
-    int16_t configFSK();
+    int16_t configFSK() override;
     void errataFix(bool rx) override;
 
 #if !RADIOLIB_GODMODE
diff --git a/src/modules/SX127x/SX1279.cpp b/src/modules/SX127x/SX1279.cpp
index df87c388..92d9f59c 100644
--- a/src/modules/SX127x/SX1279.cpp
+++ b/src/modules/SX127x/SX1279.cpp
@@ -7,7 +7,7 @@ SX1279::SX1279(Module* mod) : SX1278(mod) {
 
 int16_t SX1279::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t syncWord, int8_t power, uint16_t preambleLength, uint8_t gain) {
   // execute common part
-  uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
+  const uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
   int16_t state = SX127x::begin(versions, 3, syncWord, preambleLength);
   RADIOLIB_ASSERT(state);
 
@@ -39,7 +39,7 @@ int16_t SX1279::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t sync
 
 int16_t SX1279::beginFSK(float freq, float br, float freqDev, float rxBw, int8_t power, uint16_t preambleLength, bool enableOOK) {
   // execute common part
-  uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
+  const uint8_t versions[] = { RADIOLIB_SX1278_CHIP_VERSION, RADIOLIB_SX1278_CHIP_VERSION_ALT, RADIOLIB_SX1278_CHIP_VERSION_RFM9X };
   int16_t state = SX127x::beginFSK(versions, 3, freqDev, rxBw, preambleLength, enableOOK);
   RADIOLIB_ASSERT(state);
 
diff --git a/src/modules/SX127x/SX1279.h b/src/modules/SX127x/SX1279.h
index 865b1b22..fb2d5f43 100644
--- a/src/modules/SX127x/SX1279.h
+++ b/src/modules/SX127x/SX1279.h
@@ -38,7 +38,7 @@ class SX1279: public SX1278 {
       Set to 0 to enable automatic gain control (recommended).
       \returns \ref status_codes
     */
-    int16_t begin(float freq = 434.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = RADIOLIB_SX127X_SYNC_WORD, int8_t power = 10, uint16_t preambleLength = 8, uint8_t gain = 0);
+    int16_t begin(float freq = 434.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = RADIOLIB_SX127X_SYNC_WORD, int8_t power = 10, uint16_t preambleLength = 8, uint8_t gain = 0) override;
 
     /*!
       \brief FSK modem initialization method. Must be called at least once from Arduino sketch to initialize the module.
@@ -52,7 +52,7 @@ class SX1279: public SX1278 {
       \param enableOOK Use OOK modulation instead of FSK.
       \returns \ref status_codes
     */
-    int16_t beginFSK(float freq = 434.0, float br = 4.8, float freqDev = 5.0, float rxBw = 125.0, int8_t power = 10, uint16_t preambleLength = 16, bool enableOOK = false);
+    int16_t beginFSK(float freq = 434.0, float br = 4.8, float freqDev = 5.0, float rxBw = 125.0, int8_t power = 10, uint16_t preambleLength = 16, bool enableOOK = false) override;
 
     // configuration methods
 
diff --git a/src/modules/SX127x/SX127x.cpp b/src/modules/SX127x/SX127x.cpp
index b94bfdad..7510833e 100644
--- a/src/modules/SX127x/SX127x.cpp
+++ b/src/modules/SX127x/SX127x.cpp
@@ -6,7 +6,7 @@ SX127x::SX127x(Module* mod) : PhysicalLayer(RADIOLIB_SX127X_FREQUENCY_STEP_SIZE,
   this->mod = mod;
 }
 
-int16_t SX127x::begin(uint8_t* chipVersions, uint8_t numVersions, uint8_t syncWord, uint16_t preambleLength) {
+int16_t SX127x::begin(const uint8_t* chipVersions, uint8_t numVersions, uint8_t syncWord, uint16_t preambleLength) {
   // set module properties
   this->mod->init();
   this->mod->hal->pinMode(this->mod->getIrq(), this->mod->hal->GpioModeInput);
@@ -69,7 +69,7 @@ int16_t SX127x::begin(uint8_t* chipVersions, uint8_t numVersions, uint8_t syncWo
   return(state);
 }
 
-int16_t SX127x::beginFSK(uint8_t* chipVersions, uint8_t numVersions, float freqDev, float rxBw, uint16_t preambleLength, bool enableOOK) {
+int16_t SX127x::beginFSK(const uint8_t* chipVersions, uint8_t numVersions, float freqDev, float rxBw, uint16_t preambleLength, bool enableOOK) {
   // set module properties
   this->mod->init();
   this->mod->hal->pinMode(this->mod->getIrq(), this->mod->hal->GpioModeInput);
@@ -548,7 +548,7 @@ bool SX127x::fifoAdd(uint8_t* data, int totalLen, int* remLen) {
 
 bool SX127x::fifoGet(volatile uint8_t* data, int totalLen, volatile int* rcvLen) {
   // get pointer to the correct position in data buffer
-  uint8_t* dataPtr = (uint8_t*)&data[*rcvLen];
+  uint8_t* dataPtr = const_cast<uint8_t*>(&data[*rcvLen]);
 
   // check how much data are we still expecting
   uint8_t len = RADIOLIB_SX127X_FIFO_THRESH - 1;
@@ -1869,12 +1869,11 @@ int16_t SX127x::setHeaderType(uint8_t headerType, uint8_t bitIndex, size_t len)
   }
 
   // set requested packet mode
-  Module* mod = this->getMod();
-  int16_t state = mod->SPIsetRegValue(RADIOLIB_SX127X_REG_MODEM_CONFIG_1, headerType, bitIndex, bitIndex);
+  int16_t state = this->mod->SPIsetRegValue(RADIOLIB_SX127X_REG_MODEM_CONFIG_1, headerType, bitIndex, bitIndex);
   RADIOLIB_ASSERT(state);
 
   // set length to register
-  state = mod->SPIsetRegValue(RADIOLIB_SX127X_REG_PAYLOAD_LENGTH, len);
+  state = this->mod->SPIsetRegValue(RADIOLIB_SX127X_REG_PAYLOAD_LENGTH, len);
   RADIOLIB_ASSERT(state);
 
   // update cached value
diff --git a/src/modules/SX127x/SX127x.h b/src/modules/SX127x/SX127x.h
index 7e37162c..1edfdcd4 100644
--- a/src/modules/SX127x/SX127x.h
+++ b/src/modules/SX127x/SX127x.h
@@ -606,7 +606,7 @@ class SX127x: public PhysicalLayer {
       \param preambleLength Length of %LoRa transmission preamble in symbols.
       \returns \ref status_codes
     */
-    int16_t begin(uint8_t* chipVersions, uint8_t numVersions, uint8_t syncWord, uint16_t preambleLength);
+    int16_t begin(const uint8_t* chipVersions, uint8_t numVersions, uint8_t syncWord, uint16_t preambleLength);
 
     /*!
       \brief Reset method. Will reset the chip to the default state using RST pin. Declared pure virtual since SX1272 and SX1278 implementations differ.
@@ -623,7 +623,7 @@ class SX127x: public PhysicalLayer {
       \param enableOOK Flag to specify OOK mode. This modulation is similar to FSK.
       \returns \ref status_codes
     */
-    int16_t beginFSK(uint8_t* chipVersions, uint8_t numVersions, float freqDev, float rxBw, uint16_t preambleLength, bool enableOOK);
+    int16_t beginFSK(const uint8_t* chipVersions, uint8_t numVersions, float freqDev, float rxBw, uint16_t preambleLength, bool enableOOK);
 
     /*!
       \brief Binary transmit method. Will transmit arbitrary binary data up to 255 bytes long using %LoRa or up to 63 bytes using FSK modem.
@@ -1251,7 +1251,7 @@ class SX127x: public PhysicalLayer {
     bool ookEnabled = false;
     bool implicitHdr = false;
 
-    int16_t configFSK();
+    virtual int16_t configFSK();
     int16_t getActiveModem();
     int16_t setFrequencyRaw(float newFreq);
     int16_t setBitRateCommon(float br, uint8_t fracRegAddr);