diff --git a/src/modules/SX127x/SX1276.cpp b/src/modules/SX127x/SX1276.cpp
index b331fe95..848f0949 100644
--- a/src/modules/SX127x/SX1276.cpp
+++ b/src/modules/SX127x/SX1276.cpp
@@ -36,6 +36,28 @@ int16_t SX1276::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t sync
   return(state);
 }
 
+int16_t SX1276::beginFSK(float freq, float br, float freqDev, float rxBw, int8_t power, uint16_t preambleLength, bool enableOOK) {
+  // execute common part
+  int16_t state = SX127x::beginFSK(SX1278_CHIP_VERSION, br, freqDev, rxBw, preambleLength, enableOOK);
+  RADIOLIB_ASSERT(state);
+
+  // configure settings not accessible by API
+  state = configFSK();
+  RADIOLIB_ASSERT(state);
+
+  // configure publicly accessible settings
+  state = setFrequency(freq);
+  RADIOLIB_ASSERT(state);
+
+  state = setOutputPower(power);
+  RADIOLIB_ASSERT(state);
+
+  state = setDataShaping(RADIOLIB_SHAPING_NONE);
+  RADIOLIB_ASSERT(state);
+
+  return(state);
+}
+
 int16_t SX1276::setFrequency(float freq) {
   RADIOLIB_CHECK_RANGE(freq, 137.0, 1020.0, ERR_INVALID_FREQUENCY);
 
diff --git a/src/modules/SX127x/SX1276.h b/src/modules/SX127x/SX1276.h
index ec6e33d6..8c234a87 100644
--- a/src/modules/SX127x/SX1276.h
+++ b/src/modules/SX127x/SX1276.h
@@ -51,6 +51,28 @@ class SX1276: public SX1278 {
     */
     int16_t begin(float freq = 434.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = 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.
+
+      \param freq Carrier frequency in MHz. Allowed values range from 137.0 MHz to 525.0 MHz.
+
+      \param br Bit rate of the FSK transmission in kbps (kilobits per second). Allowed values range from 1.2 to 300.0 kbps.
+
+      \param freqDev Frequency deviation of the FSK transmission in kHz. Allowed values range from 0.6 to 200.0 kHz.
+      Note that the allowed range changes based on bit rate setting, so that the condition FreqDev + BitRate/2 <= 250 kHz is always met.
+
+      \param rxBw Receiver bandwidth in kHz. Allowed values are 2.6, 3.1, 3.9, 5.2, 6.3, 7.8, 10.4, 12.5, 15.6, 20.8, 25, 31.3, 41.7, 50, 62.5, 83.3, 100, 125, 166.7, 200 and 250 kHz.
+
+      \param power Transmission output power in dBm. Allowed values range from 2 to 17 dBm.
+
+      \param preambleLength Length of FSK preamble in bits.
+
+      \param enableOOK Use OOK modulation instead of FSK.
+
+      \returns \ref status_codes
+    */
+    int16_t beginFSK(float freq = 434.0, float br = 48.0, float freqDev = 50.0, float rxBw = 125.0, int8_t power = 10, uint16_t preambleLength = 16, bool enableOOK = false);
+
     // configuration methods
 
     /*!
diff --git a/src/modules/SX127x/SX1277.cpp b/src/modules/SX127x/SX1277.cpp
index 371c125e..005f1ca0 100644
--- a/src/modules/SX127x/SX1277.cpp
+++ b/src/modules/SX127x/SX1277.cpp
@@ -36,6 +36,28 @@ int16_t SX1277::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t sync
   return(state);
 }
 
+int16_t SX1277::beginFSK(float freq, float br, float freqDev, float rxBw, int8_t power, uint16_t preambleLength, bool enableOOK) {
+  // execute common part
+  int16_t state = SX127x::beginFSK(SX1278_CHIP_VERSION, br, freqDev, rxBw, preambleLength, enableOOK);
+  RADIOLIB_ASSERT(state);
+
+  // configure settings not accessible by API
+  state = configFSK();
+  RADIOLIB_ASSERT(state);
+
+  // configure publicly accessible settings
+  state = setFrequency(freq);
+  RADIOLIB_ASSERT(state);
+
+  state = setOutputPower(power);
+  RADIOLIB_ASSERT(state);
+
+  state = setDataShaping(RADIOLIB_SHAPING_NONE);
+  RADIOLIB_ASSERT(state);
+
+  return(state);
+}
+
 int16_t SX1277::setFrequency(float freq) {
   RADIOLIB_CHECK_RANGE(freq, 137.0, 1020.0, ERR_INVALID_FREQUENCY);
 
diff --git a/src/modules/SX127x/SX1277.h b/src/modules/SX127x/SX1277.h
index 6598f066..e0ea539e 100644
--- a/src/modules/SX127x/SX1277.h
+++ b/src/modules/SX127x/SX1277.h
@@ -51,6 +51,28 @@ class SX1277: public SX1278 {
     */
     int16_t begin(float freq = 434.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = 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.
+
+      \param freq Carrier frequency in MHz. Allowed values range from 137.0 MHz to 525.0 MHz.
+
+      \param br Bit rate of the FSK transmission in kbps (kilobits per second). Allowed values range from 1.2 to 300.0 kbps.
+
+      \param freqDev Frequency deviation of the FSK transmission in kHz. Allowed values range from 0.6 to 200.0 kHz.
+      Note that the allowed range changes based on bit rate setting, so that the condition FreqDev + BitRate/2 <= 250 kHz is always met.
+
+      \param rxBw Receiver bandwidth in kHz. Allowed values are 2.6, 3.1, 3.9, 5.2, 6.3, 7.8, 10.4, 12.5, 15.6, 20.8, 25, 31.3, 41.7, 50, 62.5, 83.3, 100, 125, 166.7, 200 and 250 kHz.
+
+      \param power Transmission output power in dBm. Allowed values range from 2 to 17 dBm.
+
+      \param preambleLength Length of FSK preamble in bits.
+
+      \param enableOOK Use OOK modulation instead of FSK.
+
+      \returns \ref status_codes
+    */
+    int16_t beginFSK(float freq = 434.0, float br = 48.0, float freqDev = 50.0, float rxBw = 125.0, int8_t power = 10, uint16_t preambleLength = 16, bool enableOOK = false);
+
     // configuration methods
 
     /*!
diff --git a/src/modules/SX127x/SX1279.cpp b/src/modules/SX127x/SX1279.cpp
index 21d1f598..346643d0 100644
--- a/src/modules/SX127x/SX1279.cpp
+++ b/src/modules/SX127x/SX1279.cpp
@@ -36,6 +36,28 @@ int16_t SX1279::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t sync
   return(state);
 }
 
+int16_t SX1279::beginFSK(float freq, float br, float freqDev, float rxBw, int8_t power, uint16_t preambleLength, bool enableOOK) {
+  // execute common part
+  int16_t state = SX127x::beginFSK(SX1278_CHIP_VERSION, br, freqDev, rxBw, preambleLength, enableOOK);
+  RADIOLIB_ASSERT(state);
+
+  // configure settings not accessible by API
+  state = configFSK();
+  RADIOLIB_ASSERT(state);
+
+  // configure publicly accessible settings
+  state = setFrequency(freq);
+  RADIOLIB_ASSERT(state);
+
+  state = setOutputPower(power);
+  RADIOLIB_ASSERT(state);
+
+  state = setDataShaping(RADIOLIB_SHAPING_NONE);
+  RADIOLIB_ASSERT(state);
+
+  return(state);
+}
+
 int16_t SX1279::setFrequency(float freq) {
   RADIOLIB_CHECK_RANGE(freq, 137.0, 960.0, ERR_INVALID_FREQUENCY);
 
diff --git a/src/modules/SX127x/SX1279.h b/src/modules/SX127x/SX1279.h
index 27220119..ef6f29e3 100644
--- a/src/modules/SX127x/SX1279.h
+++ b/src/modules/SX127x/SX1279.h
@@ -51,6 +51,28 @@ class SX1279: public SX1278 {
     */
     int16_t begin(float freq = 434.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = 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.
+
+      \param freq Carrier frequency in MHz. Allowed values range from 137.0 MHz to 525.0 MHz.
+
+      \param br Bit rate of the FSK transmission in kbps (kilobits per second). Allowed values range from 1.2 to 300.0 kbps.
+
+      \param freqDev Frequency deviation of the FSK transmission in kHz. Allowed values range from 0.6 to 200.0 kHz.
+      Note that the allowed range changes based on bit rate setting, so that the condition FreqDev + BitRate/2 <= 250 kHz is always met.
+
+      \param rxBw Receiver bandwidth in kHz. Allowed values are 2.6, 3.1, 3.9, 5.2, 6.3, 7.8, 10.4, 12.5, 15.6, 20.8, 25, 31.3, 41.7, 50, 62.5, 83.3, 100, 125, 166.7, 200 and 250 kHz.
+
+      \param power Transmission output power in dBm. Allowed values range from 2 to 17 dBm.
+
+      \param preambleLength Length of FSK preamble in bits.
+
+      \param enableOOK Use OOK modulation instead of FSK.
+
+      \returns \ref status_codes
+    */
+    int16_t beginFSK(float freq = 434.0, float br = 48.0, float freqDev = 50.0, float rxBw = 125.0, int8_t power = 10, uint16_t preambleLength = 16, bool enableOOK = false);
+
     // configuration methods
 
     /*!