diff --git a/README.md b/README.md
index a76074e..416e139 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@ The main goal is to use modern sensors (mainly [I2C](https://github.com/orgua/iL
 - **DS2401 Serial Number**
 - **DS2405 Single address switch**
 - DS2408 8-Channel Addressable Switch, GPIO Port-expander
+- **DS2411 Serial Number** (use DS2401 with same family code 0x01)
 - **DS2413 Dual channel addressable switch with input-sensing**
 - DS2423 4kb 1-Wire RAM with Counter
 - DS2433 4Kb 1-Wire EEPROM
@@ -70,4 +71,4 @@ The main goal is to use modern sensors (mainly [I2C](https://github.com/orgua/iL
 - original pieces seem to be adopted from [OneWireSlave](http://robocraft.ru/blog/arduino/302.html)
 - further development was done in [OneWireSlave](https://github.com/MarkusLange/OneWireSlave) from MarkusLange and [OneWire](https://github.com/PaulStoffregen/OneWire) 
 - first implementation of the [OneWireHub](https://github.com/Shagrat2/OneWireHub) by Shagrat2
-- the current state of code has the concepts in common, but the codebase is a (nearly) total rewrite
\ No newline at end of file
+- the current state of code has the concepts in common, but the codebase is a total rewrite
\ No newline at end of file
diff --git a/examples/OneWireHubTest/OneWireHubTest.ino b/examples/OneWireHubTest/OneWireHubTest.ino
index e767b25..0fe4252 100644
--- a/examples/OneWireHubTest/OneWireHubTest.ino
+++ b/examples/OneWireHubTest/OneWireHubTest.ino
@@ -72,7 +72,7 @@ void setup()
     hub.attach(ds2401b);
     hub.attach(ds2413);
     hub.attach(ds2438);
-    //hub.attach(ds2450); // still breaks the communication ? find out :-)
+    //hub.attach(ds2450);
     hub.attach(ds2890A);
     hub.attach(ds2890B);
     hub.attach(ds2890C);
diff --git a/src/DS2890.cpp b/src/DS2890.cpp
index 9b3c956..7db82b6 100644
--- a/src/DS2890.cpp
+++ b/src/DS2890.cpp
@@ -1,4 +1,3 @@
-
 #include "DS2890.h"
 
 DS2890::DS2890(uint8_t ID1, uint8_t ID2, uint8_t ID3, uint8_t ID4, uint8_t ID5, uint8_t ID6, uint8_t ID7) : OneWireItem(ID1, ID2, ID3, ID4, ID5, ID6, ID7)
@@ -71,7 +70,6 @@ bool DS2890::duty(OneWireHub *hub)
 
         default:
             hub->raiseSlaveError(cmd);
-            break;
     }
 
     return true;
diff --git a/src/OneWireHub.cpp b/src/OneWireHub.cpp
index 9c8f979..8cce141 100644
--- a/src/OneWireHub.cpp
+++ b/src/OneWireHub.cpp
@@ -365,7 +365,7 @@ bool OneWireHub::search(void)
 bool OneWireHub::recvAndProcessCmd(void)
 {
     uint8_t address[8];
-    bool    flag;
+    bool    flag = false;
     uint8_t cmd = recv();
 
     switch (cmd)
@@ -378,7 +378,6 @@ bool OneWireHub::recvAndProcessCmd(void)
             recv(address, 8);
             if (_error != Error::NO_ERROR)  return false;
 
-            flag = false;
             slave_selected = 0;
 
             for (uint8_t i = 0; i < ONEWIRESLAVE_LIMIT; ++i)
@@ -406,7 +405,6 @@ bool OneWireHub::recvAndProcessCmd(void)
             if (slave_selected != nullptr) slave_selected->duty(this);
             return true;
 
-
         case 0xCC: // SKIP ROM
             slave_selected = nullptr;
             return true;
@@ -417,7 +415,6 @@ bool OneWireHub::recvAndProcessCmd(void)
 
         default: // Unknown command
             _error = Error::INCORRECT_ONEWIRE_CMD;
-
     }
     return false;
 }
@@ -579,7 +576,7 @@ bool OneWireHub::waitWhilePinIs(const bool value, const uint16_t timeout_us)
         if (micros() > time_trigger) return false;
     }
 #else
-    uint16_t retries = static_cast<uint16_t>(microsecondsToClockCycles(timeout_us) >> 3);
+    uint16_t retries = static_cast<uint16_t>(microsecondsToClockCycles(timeout_us)/11);
     while (DIRECT_READ(reg, pin_bitMask) == value)
     {
         if (--retries == 0) return false;
diff --git a/src/OneWireHub.h b/src/OneWireHub.h
index e2b525a..104e229 100644
--- a/src/OneWireHub.h
+++ b/src/OneWireHub.h
@@ -55,10 +55,10 @@ class OneWireHub
     static constexpr uint8_t ONEWIRE_TREE_SIZE                  = 2*ONEWIRESLAVE_LIMIT - 1;
 
 
-    /// the following TIME-values are in us and are taken from the ds2408 datasheet
+    /// the following TIME-values are in microseconds and are taken from the ds2408 datasheet
     // should be --> datasheet
     // was       --> shagrat-legacy
-    static constexpr uint16_t ONEWIRE_TIME_BUS_CHANGE_MAX       =    5; // 
+    static constexpr uint16_t ONEWIRE_TIME_BUS_CHANGE_MAX       =    5; //
 
     static constexpr uint16_t ONEWIRE_TIME_RESET_MIN            =  380; // should be 480, and was 470
     static constexpr uint16_t ONEWIRE_TIME_RESET_MAX            =  960; // from ds2413
@@ -66,9 +66,9 @@ class OneWireHub
     static constexpr uint16_t ONEWIRE_TIME_PRESENCE_SAMPLE_MIN  =   20; // probe measures 40us
     static constexpr uint16_t ONEWIRE_TIME_PRESENCE_LOW_STD     =  140; // was 125
     static constexpr uint16_t ONEWIRE_TIME_PRESENCE_LOW_MAX     =  480; // should be 280, was 480 !!!! why
-    static constexpr uint16_t ONEWIRE_TIME_PRESENCE_HIGH_MAX    =  999; //
+    static constexpr uint16_t ONEWIRE_TIME_PRESENCE_HIGH_MAX    = 9999; //
 
-    static constexpr uint16_t ONEWIRE_TIME_SLOT_MAX             =  240; // should be 120, was ~1050
+    static constexpr uint16_t ONEWIRE_TIME_SLOT_MAX             =  999; // should be 120, was ~1050
 
     // read and write from the viewpoint of the slave!!!!
     static constexpr uint16_t ONEWIRE_TIME_READ_ONE_LOW_MAX     =   60; //
diff --git a/src/platform.h b/src/platform.h
index 3cb65a2..cb5201c 100644
--- a/src/platform.h
+++ b/src/platform.h
@@ -233,7 +233,7 @@ void sei(void);
 #endif
 
 
-#ifdef ARDUINO_attiny // Test to make it work on tiny85
+#ifdef ARDUINO_attiny // Test to make it work on aTtiny85, 8MHz
 
 #include "inttypes.h"