diff --git a/RELEASING.md b/RELEASING.md
new file mode 100644
index 0000000..a7ffa24
--- /dev/null
+++ b/RELEASING.md
@@ -0,0 +1,10 @@
+# Releasing
+
+1. Bump the `mvn_config.version` property in `mavenConfig.gradle` based on Major.Minor.Patch naming scheme
+2. Update `CHANGELOG.md` for the impending release.
+3. Update the `README.md` with the new version.
+4. `git commit -am "Prepare for release X.Y.Z"` (where X.Y.Z is the version you set in step 1)
+5. `git push`
+6. `./gradlew clean assembleRelease bintrayUpload`
+7. Create a PR from [master](../../tree/master) to [release](../../tree/release)
+8. Visit [JFrog Bintray](https://bintray.com/leinardi/androidthings) and promote the artifacts
diff --git a/dependencies.gradle b/dependencies.gradle
index 8cdbf50..8854419 100644
--- a/dependencies.gradle
+++ b/dependencies.gradle
@@ -31,8 +31,8 @@ versions.androidx_annotations = "1.0.0"
 ext.versions = versions
 
 def build_versions = [:]
-build_versions.min_sdk = 28
-build_versions.target_sdk = 28
+build_versions.min_sdk = 27
+build_versions.target_sdk = 27
 build_versions.java_version = JavaVersion.VERSION_1_7
 build_versions.version_code = 'git rev-list --count HEAD'.execute().text.trim() as int
 ext.build_versions = build_versions
diff --git a/driver-ds3231-receiver/CHANGELOG.md b/driver-ds3231-receiver/CHANGELOG.md
index 8c5f1f6..a042129 100644
--- a/driver-ds3231-receiver/CHANGELOG.md
+++ b/driver-ds3231-receiver/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change Log
 
+## [1.1] - 2019-05-26
+### Updated
+- migrated to AndroidX
+- updated gradle
+
 ## [1.0] - 2018-05-10
 ### Updated
 - update to Android Things 1.0
diff --git a/driver-ds3231-receiver/mavenConfig.gradle b/driver-ds3231-receiver/mavenConfig.gradle
index 6149711..d0421b4 100644
--- a/driver-ds3231-receiver/mavenConfig.gradle
+++ b/driver-ds3231-receiver/mavenConfig.gradle
@@ -18,7 +18,7 @@ def mvn_config = [:]
 mvn_config.repository = 'androidthings'
 mvn_config.group_id = 'com.leinardi.android.things'
 mvn_config.artifact_id = 'driver-ds3231-receiver'
-mvn_config.version = '1.0'
+mvn_config.version = '1.1.0'
 mvn_config.licenses = 'Apache-2.0' // Comma separated
 mvn_config.website = 'https://github.com/leinardi/androidthings-drivers'
 mvn_config.issue_tracker_url = 'https://github.com/leinardi/androidthings-drivers/issues'
diff --git a/driver-ds3231/CHANGELOG.md b/driver-ds3231/CHANGELOG.md
index 6641bf4..d9065ef 100644
--- a/driver-ds3231/CHANGELOG.md
+++ b/driver-ds3231/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change Log
 
+## [1.1] - 2019-05-26
+### Updated
+- migrated to AndroidX
+- updated gradle
+
 ## [1.0] - 2018-05-10
 ### Updated
 - update to Android Things 1.0
diff --git a/driver-ds3231/mavenConfig.gradle b/driver-ds3231/mavenConfig.gradle
index 2dde199..5737dbe 100644
--- a/driver-ds3231/mavenConfig.gradle
+++ b/driver-ds3231/mavenConfig.gradle
@@ -18,7 +18,7 @@ def mvn_config = [:]
 mvn_config.repository = 'androidthings'
 mvn_config.group_id = 'com.leinardi.android.things'
 mvn_config.artifact_id = 'driver-ds3231'
-mvn_config.version = '1.0'
+mvn_config.version = '1.1.0'
 mvn_config.licenses = 'Apache-2.0' // Comma separated
 mvn_config.website = 'https://github.com/leinardi/androidthings-drivers'
 mvn_config.issue_tracker_url = 'https://github.com/leinardi/androidthings-drivers/issues'
diff --git a/driver-epaperdriverhat/CHANGELOG.md b/driver-epaperdriverhat/CHANGELOG.md
index 295d089..987b6bf 100644
--- a/driver-epaperdriverhat/CHANGELOG.md
+++ b/driver-epaperdriverhat/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change Log
 
+## [1.1] - 2019-05-26
+### Updated
+- migrated to AndroidX
+- updated gradle
+
 ## [1.0] - 2018-05-10
 ### Updated
 - update to Android Things 1.0
diff --git a/driver-epaperdriverhat/mavenConfig.gradle b/driver-epaperdriverhat/mavenConfig.gradle
index 43d3443..eb97a1a 100644
--- a/driver-epaperdriverhat/mavenConfig.gradle
+++ b/driver-epaperdriverhat/mavenConfig.gradle
@@ -18,7 +18,7 @@ def mvn_config = [:]
 mvn_config.repository = 'androidthings'
 mvn_config.group_id = 'com.leinardi.android.things'
 mvn_config.artifact_id = 'driver-epaperdriverhat'
-mvn_config.version = '1.0'
+mvn_config.version = '1.1.0'
 mvn_config.licenses = 'Apache-2.0' // Comma separated
 mvn_config.website = 'https://github.com/leinardi/androidthings-drivers'
 mvn_config.issue_tracker_url = 'https://github.com/leinardi/androidthings-drivers/issues'
diff --git a/driver-hcsr04/CHANGELOG.md b/driver-hcsr04/CHANGELOG.md
index bf85674..c53a447 100644
--- a/driver-hcsr04/CHANGELOG.md
+++ b/driver-hcsr04/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change Log
 
+## [1.1] - 2019-05-26
+### Updated
+- migrated to AndroidX
+- updated gradle
+
 ## [1.0] - 2018-05-10
 ### Updated
 - update to Android Things 1.0
diff --git a/driver-hcsr04/mavenConfig.gradle b/driver-hcsr04/mavenConfig.gradle
index ae9038e..6ad8b7f 100644
--- a/driver-hcsr04/mavenConfig.gradle
+++ b/driver-hcsr04/mavenConfig.gradle
@@ -18,7 +18,7 @@ def mvn_config = [:]
 mvn_config.repository = 'androidthings'
 mvn_config.group_id = 'com.leinardi.android.things'
 mvn_config.artifact_id = 'driver-hcsr04'
-mvn_config.version = '1.0'
+mvn_config.version = '1.1.0'
 mvn_config.licenses = 'Apache-2.0' // Comma separated
 mvn_config.website = 'https://github.com/leinardi/androidthings-drivers'
 mvn_config.issue_tracker_url = 'https://github.com/leinardi/androidthings-drivers/issues'
diff --git a/driver-hd44780/CHANGELOG.md b/driver-hd44780/CHANGELOG.md
index 18afadb..34a1517 100644
--- a/driver-hd44780/CHANGELOG.md
+++ b/driver-hd44780/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change Log
 
+## [1.1] - 2019-05-26
+### Updated
+- migrated to AndroidX
+- updated gradle
+
 ## [1.0] - 2018-05-10
 ### Updated
 - update to Android Things 1.0
diff --git a/driver-hd44780/mavenConfig.gradle b/driver-hd44780/mavenConfig.gradle
index ac7d503..b5f0663 100644
--- a/driver-hd44780/mavenConfig.gradle
+++ b/driver-hd44780/mavenConfig.gradle
@@ -18,7 +18,7 @@ def mvn_config = [:]
 mvn_config.repository = 'androidthings'
 mvn_config.group_id = 'com.leinardi.android.things'
 mvn_config.artifact_id = 'driver-hd44780'
-mvn_config.version = '1.0'
+mvn_config.version = '1.1.0'
 mvn_config.licenses = 'Apache-2.0' // Comma separated
 mvn_config.website = 'https://github.com/leinardi/androidthings-drivers'
 mvn_config.issue_tracker_url = 'https://github.com/leinardi/androidthings-drivers/issues'
diff --git a/driver-lsm9ds1/CHANGELOG.md b/driver-lsm9ds1/CHANGELOG.md
index 0069132..a342638 100644
--- a/driver-lsm9ds1/CHANGELOG.md
+++ b/driver-lsm9ds1/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change Log
 
+## [1.1] - 2019-05-26
+### Updated
+- migrated to AndroidX
+- updated gradle
+
 ## [1.0] - 2018-05-10
 ### Updated
 - update to Android Things 1.0
diff --git a/driver-lsm9ds1/mavenConfig.gradle b/driver-lsm9ds1/mavenConfig.gradle
index 06d0b81..ab0a0e3 100644
--- a/driver-lsm9ds1/mavenConfig.gradle
+++ b/driver-lsm9ds1/mavenConfig.gradle
@@ -18,7 +18,7 @@ def mvn_config = [:]
 mvn_config.repository = 'androidthings'
 mvn_config.group_id = 'com.leinardi.android.things'
 mvn_config.artifact_id = 'driver-lsm9ds1'
-mvn_config.version = '1.0'
+mvn_config.version = '1.1.0'
 mvn_config.licenses = 'Apache-2.0' // Comma separated
 mvn_config.website = 'https://github.com/leinardi/androidthings-drivers'
 mvn_config.issue_tracker_url = 'https://github.com/leinardi/androidthings-drivers/issues'
diff --git a/driver-sh1106/CHANGELOG.md b/driver-sh1106/CHANGELOG.md
index 8be00b2..d68158d 100644
--- a/driver-sh1106/CHANGELOG.md
+++ b/driver-sh1106/CHANGELOG.md
@@ -1,5 +1,14 @@
 # Change Log
 
+## [1.1] - 2019-05-26
+### Updated
+- migrated to AndroidX
+- updated gradle
+
+## [1.0] - 2018-05-10
+### Updated
+- update to Android Things 1.0
+
 ## [0.3] - 2018-04-07
 ### Updated
 - update to Android Things devpreview-0.7
diff --git a/driver-sh1106/mavenConfig.gradle b/driver-sh1106/mavenConfig.gradle
index 362b01e..405a392 100644
--- a/driver-sh1106/mavenConfig.gradle
+++ b/driver-sh1106/mavenConfig.gradle
@@ -18,7 +18,7 @@ def mvn_config = [:]
 mvn_config.repository = 'androidthings'
 mvn_config.group_id = 'com.leinardi.android.things'
 mvn_config.artifact_id = 'driver-sh1106'
-mvn_config.version = '1.0'
+mvn_config.version = '1.1.0'
 mvn_config.licenses = 'Apache-2.0' // Comma separated
 mvn_config.website = 'https://github.com/leinardi/androidthings-drivers'
 mvn_config.issue_tracker_url = 'https://github.com/leinardi/androidthings-drivers/issues'
diff --git a/driver-tsl256x/CHANGELOG.md b/driver-tsl256x/CHANGELOG.md
index 3e5d063..3b259dd 100644
--- a/driver-tsl256x/CHANGELOG.md
+++ b/driver-tsl256x/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change Log
 
+## [1.1] - 2019-05-26
+### Updated
+- migrated to AndroidX
+- updated gradle
+
 ## [1.0] - 2018-05-10
 ### Updated
 - update to Android Things 1.0
diff --git a/driver-tsl256x/mavenConfig.gradle b/driver-tsl256x/mavenConfig.gradle
index 081e643..f297559 100644
--- a/driver-tsl256x/mavenConfig.gradle
+++ b/driver-tsl256x/mavenConfig.gradle
@@ -18,7 +18,7 @@ def mvn_config = [:]
 mvn_config.repository = 'androidthings'
 mvn_config.group_id = 'com.leinardi.android.things'
 mvn_config.artifact_id = 'driver-tsl256x'
-mvn_config.version = '1.0'
+mvn_config.version = '1.1.0'
 mvn_config.licenses = 'Apache-2.0' // Comma separated
 mvn_config.website = 'https://github.com/leinardi/androidthings-drivers'
 mvn_config.issue_tracker_url = 'https://github.com/leinardi/androidthings-drivers/issues'