diff --git a/lib/TasmotaSerial-2.3.2/src/TasmotaSerial.cpp b/lib/TasmotaSerial-2.3.2/src/TasmotaSerial.cpp
index 3611a563c..a6b42bf03 100755
--- a/lib/TasmotaSerial-2.3.2/src/TasmotaSerial.cpp
+++ b/lib/TasmotaSerial-2.3.2/src/TasmotaSerial.cpp
@@ -76,7 +76,7 @@ static void (*ISRList[16])() = {
       tms_isr_15
 };
 
-TasmotaSerial::TasmotaSerial(int receive_pin, int transmit_pin, int hardware_fallback, int nwmode)
+TasmotaSerial::TasmotaSerial(int receive_pin, int transmit_pin, int hardware_fallback, int nwmode, int buffer_size)
 {
   m_valid = false;
   m_hardserial = 0;
@@ -98,7 +98,7 @@ TasmotaSerial::TasmotaSerial(int receive_pin, int transmit_pin, int hardware_fal
   }
   else {
     if (m_rx_pin > -1) {
-      m_buffer = (uint8_t*)malloc(TM_SERIAL_BUFFER_SIZE);
+      m_buffer = (uint8_t*)malloc(serial_buffer_size);
       if (m_buffer == NULL) return;
       // Use getCycleCount() loop to get as exact timing as possible
       m_bit_time = ESP.getCpuFreqMHz() * 1000000 / TM_SERIAL_BAUDRATE;
@@ -185,7 +185,7 @@ int TasmotaSerial::read()
   } else {
     if ((-1 == m_rx_pin) || (m_in_pos == m_out_pos)) return -1;
     uint8_t ch = m_buffer[m_out_pos];
-    m_out_pos = (m_out_pos +1) % TM_SERIAL_BUFFER_SIZE;
+    m_out_pos = (m_out_pos +1) % serial_buffer_size;
     return ch;
   }
 }
@@ -196,7 +196,7 @@ int TasmotaSerial::available()
     return Serial.available();
   } else {
     int avail = m_in_pos - m_out_pos;
-    if (avail < 0) avail += TM_SERIAL_BUFFER_SIZE;
+    if (avail < 0) avail += serial_buffer_size;
     return avail;
   }
 }
@@ -260,7 +260,7 @@ if (!m_nwmode) {
     TM_SERIAL_WAIT;
   }
   // Store the received value in the buffer unless we have an overflow
-  unsigned int next = (m_in_pos+1) % TM_SERIAL_BUFFER_SIZE;
+  unsigned int next = (m_in_pos+1) % serial_buffer_size;
   if (next != (int)m_out_pos) {
     m_buffer[m_in_pos] = rec;
     m_in_pos = next;
@@ -297,7 +297,7 @@ if (!m_nwmode) {
         ss_byte|=(1<<i);
       }
       //stobyte(0,ssp->ss_byte>>1);
-      unsigned int next = (m_in_pos+1) % TM_SERIAL_BUFFER_SIZE;
+      unsigned int next = (m_in_pos+1) % serial_buffer_size;
       if (next != (int)m_out_pos) {
         m_buffer[m_in_pos] = ss_byte>>1;
         m_in_pos = next;
@@ -311,7 +311,7 @@ if (!m_nwmode) {
     if (diff>=LASTBIT) {
       // bit zero was 0,
       //stobyte(0,ssp->ss_byte>>1);
-      unsigned int next = (m_in_pos+1) % TM_SERIAL_BUFFER_SIZE;
+      unsigned int next = (m_in_pos+1) % serial_buffer_size;
       if (next != (int)m_out_pos) {
         m_buffer[m_in_pos] = ss_byte>>1;
         m_in_pos = next;
diff --git a/lib/TasmotaSerial-2.3.2/src/TasmotaSerial.h b/lib/TasmotaSerial-2.3.2/src/TasmotaSerial.h
index 6e1d6469a..57adb9e26 100755
--- a/lib/TasmotaSerial-2.3.2/src/TasmotaSerial.h
+++ b/lib/TasmotaSerial-2.3.2/src/TasmotaSerial.h
@@ -38,7 +38,7 @@
 
 class TasmotaSerial : public Stream {
   public:
-    TasmotaSerial(int receive_pin, int transmit_pin, int hardware_fallback = 0,int nwmode = 0);
+    TasmotaSerial(int receive_pin, int transmit_pin, int hardware_fallback = 0,int nwmode = 0, int buffer_size = TM_SERIAL_BUFFER_SIZE);
     virtual ~TasmotaSerial();
 
     bool begin(long speed, int stop_bits = 1);
@@ -75,6 +75,7 @@ class TasmotaSerial : public Stream {
     unsigned int m_in_pos;
     unsigned int m_out_pos;
     uint8_t *m_buffer;
+    int serial_buffer_size;
 };
 
 #endif  // TasmotaSerial_h