[BlueZ PATCH v5 8/8] doc: Update Advertisement Monitor API description

[Miao-chen Chou <mcchou@chromium.org>]

This modifies the following description to Advertisement Monitor API.
- Add org.bluez.Error.Failed to RegisterMonitor() method.
- Add more description about the usage of RegisterMonitor() and
UnregisterMonitor() methods.
- Add description about the ranges for the fields in property
RSSIThresholdsAndTimers.

Reviewed-by: Yun-Hao Chung <howardchung@google.com>
Reviewed-by: Manish Mandlik <mmandlik@chromium.org>
---

(no changes since v1)

 doc/advertisement-monitor-api.txt | 34 +++++++++++++++++++++++--------
 1 file changed, 25 insertions(+), 9 deletions(-)

diff --git a/doc/advertisement-monitor-api.txt b/doc/advertisement-monitor-api.txt
index 74adbfae9..e09b6fd25 100644
--- a/doc/advertisement-monitor-api.txt
+++ b/doc/advertisement-monitor-api.txt
@@ -49,7 +49,7 @@ Properties	string Type [read-only]
 			org.bluez.AdvertisementMonitorManager1 for the available
 			options.
 
-		(Int16, Uint16, Int16, Uint16) RSSIThreshholdsAndTimers [read-only, optional]
+		(Int16, Uint16, Int16, Uint16) RSSIThresholdsAndTimers [read-only, optional]
 
 			This contains HighRSSIThreshold, HighRSSIThresholdTimer,
 			LowRSSIThreshold, LowRSSIThresholdTimer in order. The
@@ -66,7 +66,11 @@ Properties	string Type [read-only]
 			RSSIs of the received advertisement(s) during
 			LowRSSIThresholdTimer do not reach LowRSSIThreshold.
 
-		array{(uint8, uint8, string)} Patterns [read-only, optional]
+			The valid range of a RSSI is -127 to +20 dBm while 127
+			dBm indicates unset. The valid range of a timer is 1 to
+			300 seconds while 0 indicates unset.
+
+		array{(uint8, uint8, array{byte})} Patterns [read-only, optional]
 
 			If Type is set to 0x01, this must exist and has at least
 			one entry in the array.
@@ -80,8 +84,9 @@ Properties	string Type [read-only]
 				See https://www.bluetooth.com/specifications/
 				assigned-numbers/generic-access-profile/ for
 				the possible allowed value.
-			string content_of_pattern
-				This is the value of the pattern.
+			array{byte} content_of_pattern
+				This is the value of the pattern. The maximum
+				length of the bytes is 31.
 
 Advertisement Monitor Manager hierarchy
 =======================================
@@ -91,20 +96,31 @@ Object path	/org/bluez/{hci0,hci1,...}
 
 Methods		void RegisterMonitor(object application)
 
-			This registers a hierarchy of advertisement monitors.
+			This registers the root path of a hierarchy of
+			advertisement monitors.
 			The application object path together with the D-Bus
 			system bus connection ID define the identification of
 			the application registering advertisement monitors.
+			Once a root path is registered by a client via this
+			method, the client can freely expose/unexpose
+			advertisement monitors without re-registering the root
+			path again. After use, the client should call
+			UnregisterMonitor() method to invalidate the
+			advertisement monitors.
 
 			Possible errors: org.bluez.Error.InvalidArguments
 					 org.bluez.Error.AlreadyExists
+					 org.bluez.Error.Failed
 
 		void UnregisterMonitor(object application)
 
-			This unregisters advertisement monitors that have been
-			previously registered. The object path parameter must
-			match the same value that has been used on
-			registration.
+			This unregisters a hierarchy of advertisement monitors
+			that has been previously registered. The object path
+			parameter must match the same value that has been used
+			on registration. Upon unregistration, the advertisement
+			monitor(s) should expect to receive Release() method as
+			the signal that the advertisement monitor(s) has been
+			deactivated.
 
 			Possible errors: org.bluez.Error.InvalidArguments
 					 org.bluez.Error.DoesNotExist
-- 
2.26.2