diff --git a/stcgal/protocols.py b/stcgal/protocols.py
index e7ed581..52a4262 100644
--- a/stcgal/protocols.py
+++ b/stcgal/protocols.py
@@ -198,8 +198,8 @@ class StcBaseProtocol(ABC):
                 raise serial.SerialTimeoutException("pulse timeout")
             self.ser.write(character)
             self.ser.flush()
-            time.sleep(0.015)
-            duration += 0.015
+            time.sleep(0.030)
+            duration += 0.030
             if self.ser.inWaiting() > 0: break
 
     def initialize_model(self):
@@ -269,6 +269,7 @@ class StcBaseProtocol(ABC):
             self.ser.setDTR(True)
             time.sleep(0.5)
             self.ser.setDTR(False)
+            time.sleep(0.030)
             print("done")
         else:
             print("Cycling power via shell cmd: " + resetcmd)
@@ -522,7 +523,7 @@ class Stc89Protocol(StcBaseProtocol):
         packet += struct.pack(">H", brt)
         packet += bytes([0xff - (brt >> 8), brt_csum, delay, iap])
         self.write_packet(packet)
-        time.sleep(0.2)
+        time.sleep(0.1)
         self.ser.baudrate = self.baud_transfer
         response = self.read_packet()
         self.ser.baudrate = self.baud_handshake
@@ -536,7 +537,7 @@ class Stc89Protocol(StcBaseProtocol):
         packet += struct.pack(">H", brt)
         packet += bytes([0xff - (brt >> 8), brt_csum, delay])
         self.write_packet(packet)
-        time.sleep(0.2)
+        time.sleep(0.1)
         self.ser.baudrate = self.baud_transfer
         response = self.read_packet()
         if response[0] != 0x8e:
@@ -712,7 +713,7 @@ class Stc12AProtocol(Stc12AOptionsMixIn, Stc89Protocol):
         sys.stdout.flush()
         packet = bytes([0x8f, 0xc0, brt, 0x3f, brt_csum, delay, iap])
         self.write_packet(packet)
-        time.sleep(0.2)
+        time.sleep(0.1)
         self.ser.baudrate = self.baud_transfer
         response = self.read_packet()
         self.ser.baudrate = self.baud_handshake
@@ -724,7 +725,7 @@ class Stc12AProtocol(Stc12AOptionsMixIn, Stc89Protocol):
         sys.stdout.flush()
         packet = bytes([0x8e, 0xc0, brt, 0x3f, brt_csum, delay])
         self.write_packet(packet)
-        time.sleep(0.2)
+        time.sleep(0.1)
         self.ser.baudrate = self.baud_transfer
         response = self.read_packet()
         if response[0] != 0x8e:
@@ -912,7 +913,7 @@ class Stc12BaseProtocol(StcBaseProtocol):
         sys.stdout.flush()
         packet = bytes([0x8f, 0xc0, brt, 0x3f, brt_csum, delay, iap])
         self.write_packet(packet)
-        time.sleep(0.2)
+        time.sleep(0.1)
         self.ser.baudrate = self.baud_transfer
         response = self.read_packet()
         self.ser.baudrate = self.baud_handshake
@@ -924,7 +925,7 @@ class Stc12BaseProtocol(StcBaseProtocol):
         sys.stdout.flush()
         packet = bytes([0x8e, 0xc0, brt, 0x3f, brt_csum, delay])
         self.write_packet(packet)
-        time.sleep(0.2)
+        time.sleep(0.1)
         self.ser.baudrate = self.baud_transfer
         response = self.read_packet()
         if response[0] != 0x84:
@@ -1206,7 +1207,7 @@ class Stc15AProtocol(Stc12Protocol):
         packet += struct.pack(">B", 230400 // self.baud_transfer)
         packet += bytes([0xa1, 0x64, 0xb8, 0x00, iap_wait, 0x20, 0xff, 0x00])
         self.write_packet(packet)
-        time.sleep(0.2)
+        time.sleep(0.1)
         self.ser.baudrate = self.baud_transfer
         response = self.read_packet()
         if response[0] != 0x84: