diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7b05629..a76ef59 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 All notable changes to this project will be documented in this file.  
 
-## [Unreleased]
+## [1.2.0] - 2021-02-08
 
 ### Added
 - `NimBLECharacteristic::getDescriptorByHandle`: Return the BLE Descriptor for the given handle.
@@ -47,11 +47,15 @@ Overloads to get a vector containing pointers to all the characteristics in a se
   - `haveTargetAddress/getTargetAddressCount/getTargetAddress(index)`: checks if a target address is present / gets a count of the addresses targeted / gets the address of the target at index.
 
 ### Changed
+- `nimconfig.h` (Arduino) is now easier to use.
+
 - `NimBLEServer::getServiceByUUID` Now takes an extra parameter of instanceID to support multiple services with the same UUID.
 
 - `NimBLEService::getCharacteristic` Now takes an extra parameter of instanceID to support multiple characteristics with the same UUID.
 
-- `NimBLEAdvertising` Transmission power is no longer advertised by default and can be added to the advertisement by calling `NimBLEAdvertising::addTxPower`  
+- `NimBLEAdvertising` Transmission power is no longer advertised by default and can be added to the advertisement by calling `NimBLEAdvertising::addTxPower`
+
+- `NimBLEAdvertising` Custom scan response data can now be used without custom advertisment.
 
 - `NimBLEScan` Now uses the controller duplicate filter.  
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index df4576c..650f323 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,6 +17,7 @@ set(COMPONENT_SRCS
     "src/NimBLEDevice.cpp"
     "src/NimBLEEddystoneTLM.cpp"
     "src/NimBLEEddystoneURL.cpp"
+    "src/NimBLEHIDDevice.cpp"
     "src/NimBLERemoteCharacteristic.cpp"
     "src/NimBLERemoteDescriptor.cpp"
     "src/NimBLERemoteService.cpp"
diff --git a/docs/Command_line_config.md b/docs/Command_line_config.md
index b6ab72f..c22565f 100644
--- a/docs/Command_line_config.md
+++ b/docs/Command_line_config.md
@@ -1,27 +1,21 @@
 # Arduino command line and platformio config options  
 
-`CONFIG_BT_NIMBLE_ROLE_CENTRAL_DISABLED`  
- 
- If defined, NimBLE Client functions will not be included.  
-- Reduces flash size by approx. 7kB.  
+`CONFIG_BT_NIMBLE_MAX_CONNECTIONS`  
+
+Sets the number of simultaneous connections (esp controller max is 9)  
+- Default value is 3  
 <br/>
 
-`CONFIG_BT_NIMBLE_ROLE_OBSERVER_DISABLED`    
+`CONFIG_BT_NIMBLE_ATT_PREFERRED_MTU`  
 
-If defined, NimBLE Scan functions will not be included.  
-- Reduces flash size by approx. 26kB.  
+Sets the default MTU size.  
+- Default value is 255  
 <br/>
 
-`CONFIG_BT_NIMBLE_ROLE_PERIPHERAL_DISABLED`   
+`CONFIG_BT_NIMBLE_SVC_GAP_DEVICE_NAME`  
 
-If defined NimBLE Server functions will not be included.  
-- Reduces flash size by approx. 16kB.  
-<br/>
-
-`CONFIG_BT_NIMBLE_ROLE_BROADCASTER_DISABLED`    
-
-If defined, NimBLE Advertising functions will not be included.  
-- Reduces flash size by approx. 5kB.  
+Set the default device name  
+- Default value is "nimble"  
 <br/>
 
 `CONFIG_BT_NIMBLE_DEBUG`   
@@ -48,6 +42,67 @@ If defined, advertisment types will be printed as text while scanning in debug l
 - Uses approx. 250 bytes of flash memory.  
 <br/>
 
+`CONFIG_BT_NIMBLE_SVC_GAP_APPEARANCE`  
+
+Set the default appearance.  
+- Default value is 0x00  
+<br/>
+
+`CONFIG_BT_NIMBLE_ROLE_CENTRAL_DISABLED`  
+ 
+If defined, NimBLE Client functions will not be included.  
+- Reduces flash size by approx. 7kB.  
+<br/>
+
+`CONFIG_BT_NIMBLE_ROLE_OBSERVER_DISABLED`  
+
+If defined, NimBLE Scan functions will not be included.  
+- Reduces flash size by approx. 26kB.  
+<br/>
+
+`CONFIG_BT_NIMBLE_ROLE_PERIPHERAL_DISABLED`  
+
+If defined NimBLE Server functions will not be included.  
+- Reduces flash size by approx. 16kB.  
+<br/>
+
+`CONFIG_BT_NIMBLE_ROLE_BROADCASTER_DISABLED`  
+
+If defined, NimBLE Advertising functions will not be included.  
+- Reduces flash size by approx. 5kB.  
+<br/>
+
+`CONFIG_BT_NIMBLE_MAX_BONDS`  
+
+Sets the number of devices allowed to store/bond with  
+- Default value is 3  
+<br/>
+
+`CONFIG_BT_NIMBLE_MAX_CCCDS`  
+
+Sets the maximum number of CCCD subscriptions to store  
+- Default value is 8  
+<br/>
+
+`CONFIG_BT_NIMBLE_RPA_TIMEOUT`  
+
+Sets the random address refresh time in seconds.  
+- Default value is 900  
+<br/>
+
+`CONFIG_BT_NIMBLE_MSYS1_BLOCK_COUNT`  
+
+Set the number of msys blocks For prepare write & prepare responses. This may need to be increased if  
+you are sending large blocks of data with a low MTU. E.g: 512 bytes with 23 MTU will fail.  
+- Default value is 12  
+<br/>
+
+`CONFIG_BT_NIMBLE_MEM_ALLOC_MODE_EXTERNAL`  
+
+Sets the NimBLE stack to use external PSRAM will be loaded  
+- Must be defined with a value of 1; Default is CONFIG_BT_NIMBLE_MEM_ALLOC_MODE_INTERNAL 1  
+<br/>
+
 `CONFIG_BT_NIMBLE_PINNED_TO_CORE`  
 
 Sets the core the NimBLE host stack will run on   
@@ -56,37 +111,7 @@ Sets the core the NimBLE host stack will run on
 
 `CONFIG_BT_NIMBLE_TASK_STACK_SIZE`  
 
-Set the task stack size for the NimBLE core.
+Set the task stack size for the NimBLE core.  
 - Default is 4096  
 <br/>
 
-`CONFIG_BT_NIMBLE_MEM_ALLOC_MODE_EXTERNAL`
-
-Sets the NimBLE stack to use external PSRAM will be loaded  
-- Must be defined with a value of 1; Default is CONFIG_BT_NIMBLE_MEM_ALLOC_MODE_INTERNAL 1  
-<br/>
-
-`CONFIG_BT_NIMBLE_MAX_CONNECTIONS`
-
-Sets the number of simultaneous connections (esp controller max is 9)  
-- Default value is 3  
-<br/>
- 
-`CONFIG_BT_NIMBLE_MAX_BONDS`
-
-Sets the number of devices allowed to store/bond with  
-- Default value is 3  
-<br/>
-
-`CONFIG_BT_NIMBLE_MAX_CCCDS` 
-
-Sets the maximum number of CCCD subscriptions to store  
-- Default value is 8  
-<br/>
- 
-`CONFIG_BT_NIMBLE_SVC_GAP_DEVICE_NAME`  
-
-Set the default device name  
-- Default value is "nimble"  
-<br/>
-
diff --git a/docs/Doxyfile b/docs/Doxyfile
index bf43050..25b457c 100644
--- a/docs/Doxyfile
+++ b/docs/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "esp-nimble-cpp / NimBLE-Arduino"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 1.1.0
+PROJECT_NUMBER         = 1.2.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/docs/Migration_guide.md b/docs/Migration_guide.md
index ca11884..59854e5 100644
--- a/docs/Migration_guide.md
+++ b/docs/Migration_guide.md
@@ -220,10 +220,11 @@ If you wish to advertise these parameters you can still do so manually via `BLEA
 <br/>
 
 Calling `NimBLEAdvertising::setAdvertisementData` will entirely replace any data set with `NimBLEAdvertising::addServiceUUID`, or  
-`NimBLEAdvertising::setAppearance`. You should set all the data you wish to advertise within the `NimBLEAdvertisementData` instead.  
+`NimBLEAdvertising::setAppearance` or similar methods. You should set all the data you wish to advertise within the `NimBLEAdvertisementData` instead.  
 
-Calling `NimBLEAdvertising::setScanResponseData` without also calling `NimBLEAdvertising::setAdvertisementData` will have no effect.  
-When using custom scan response data you must also use custom advertisement data.  
+~~Calling `NimBLEAdvertising::setScanResponseData` without also calling `NimBLEAdvertising::setAdvertisementData` will have no effect.  
+When using custom scan response data you must also use custom advertisement data.~~  
+No longer true as of release 1.2.0 and above, custom scan response is now supported without custom advertisement data.  
 <br/>
 
 > BLEAdvertising::start (NimBLEAdvertising::start)
diff --git a/src/NimBLEAdvertising.cpp b/src/NimBLEAdvertising.cpp
index 08493d1..3e9ae4a 100644
--- a/src/NimBLEAdvertising.cpp
+++ b/src/NimBLEAdvertising.cpp
@@ -142,7 +142,7 @@ void NimBLEAdvertising::setName(const std::string &name) {
 
 /**
  * @brief Set the advertised manufacturer data.
- * @param [in] name The data to advertise.
+ * @param [in] data The data to advertise.
  */
 void NimBLEAdvertising::setManufacturerData(const std::string &data) {
     m_mfgData.assign(data.begin(), data.end());
@@ -154,7 +154,7 @@ void NimBLEAdvertising::setManufacturerData(const std::string &data) {
 
 /**
  * @brief Set the advertised URI.
- * @param [in] name The URI to advertise.
+ * @param [in] uri The URI to advertise.
  */
 void NimBLEAdvertising::setURI(const std::string &uri) {
     m_uri.assign(uri.begin(), uri.end());
diff --git a/src/NimBLECharacteristic.cpp b/src/NimBLECharacteristic.cpp
index c820b2b..0ffa9fb 100644
--- a/src/NimBLECharacteristic.cpp
+++ b/src/NimBLECharacteristic.cpp
@@ -126,7 +126,7 @@ NimBLEDescriptor* NimBLECharacteristic::getDescriptorByUUID(const NimBLEUUID &uu
 
 /**
  * @brief Return the BLE Descriptor for the given handle.
- * @param [in] uuid The handle of the descriptor.
+ * @param [in] handle The handle of the descriptor.
  * @return A pointer to the descriptor object or nullptr if not found.
  */
 NimBLEDescriptor *NimBLECharacteristic::getDescriptorByHandle(uint16_t handle) {
diff --git a/src/NimBLEDevice.cpp b/src/NimBLEDevice.cpp
index a90f929..dc9caf3 100644
--- a/src/NimBLEDevice.cpp
+++ b/src/NimBLEDevice.cpp
@@ -403,7 +403,7 @@ void NimBLEDevice::stopAdvertising() {
 
 
 /**
- * @brief Set the duplicate filter mode for filtering scanned devices.
+ * @brief Set the duplicate filter cache size for filtering scanned devices.
  * @param [in] cacheSize The number of advertisements filtered before the cache is reset.\n
  * Range is 10-1000, a larger value will reduce how often the same devices are reported.
  * @details Must only be called before calling NimBLEDevice::init.