Sg90 servo

README.md

@@ -64,6 +64,7 @@ The following table the currently supported devices within this project:
 | Sensor      | 1-Wire     | (1)     | [DHT22 Temp/Humidity sensor](src/main/java/com/pi4j/devices/dht22/README.md)                                                                  
 | Sensor      |            |         | [HC-SR04 Ultrasonic Sensor](src/main/java/com/pi4j/devices/hcsr04/README.md)                                                                  
 | Sensor      | I2C        | (1)     | [MPL3115A2 Temp/Pressure/Altitude device](src/main/java/com/pi4j/devices/mpl3115a2/README.md)                                                 
+| Servo       | PWM        |         | [SG90 180 degree servo device](src/main/java/com/pi4j/devices/sg90/README.md)                                                 
 
 
 ### Notes:

assets/runDHT22.sh

@@ -1,2 +1,2 @@
 #!/usr/bin/env bash
- java  -classpath ./*:../classes  com.pi4j.devices.dht22.DHT22_App  $@
+ java  -classpath ./*:../classes  com.pi4j.devices.dht22.DHT22_App  $@

assets/runSG90.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+
+ java  -classpath ./*:../classes  com.pi4j.devices.sg90.SG90_App  $@

pom.xml

@@ -23,7 +23,7 @@
         <java.version>25</java.version>
         <maven.compiler.source>${java.version}</maven.compiler.source>
         <maven.compiler.target>${java.version}</maven.compiler.target>
-         <maven-jar-plugin.version>3.2.0</maven-jar-plugin.version>
+        <maven-jar-plugin.version>3.2.0</maven-jar-plugin.version>
         <maven-source-plugin.version>3.3.1</maven-source-plugin.version>
         <maven-bundle-plugin.version>5.1.9</maven-bundle-plugin.version>
         <maven-javadoc-plugin.version>3.3.2</maven-javadoc-plugin.version>
@@ -33,9 +33,9 @@
 
         <!-- DEPENDENCIES VERSIONS  2.0.3  -SNAPSHOT  -->
         <slf4j.version>2.0.17</slf4j.version>
-        <pi4j.version>4.0.1</pi4j.version>
-        <!--pi4j.version>5.0.0-SNAPSHOT</pi4j.version -->
 
+        <pi4j.version>5.0.0-SNAPSHOT</pi4j.version>
+        <pi4j-driver.version>2.0.0-SNAPSHOT</pi4j-driver.version>
         <!-- BUILD PLUGIN VERSIONS -->
         <exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
         <maven-compiler-plugin.version>3.13.0</maven-compiler-plugin.version>
@@ -60,6 +60,17 @@
             <name>Sonatype OSS Maven2 Repository</name>
             <url>https://mvnrepository.com/artifact/org.apache.felix/maven-bundle-plugin</url>
         </repository>
+        <repository>
+            <id>sonatype-snapshots</id>
+            <name>Maven Central Snapshots</name>
+            <url>https://central.sonatype.com/repository/maven-snapshots</url>
+            <releases>
+                <enabled>false</enabled>
+            </releases>
+            <snapshots>
+                <enabled>true</enabled>
+            </snapshots>
+        </repository>
         <repository>
             <id>sonatype-oss-staging</id>
             <name>Sonatype Open Source Maven Repository</name>
@@ -84,27 +95,27 @@
             <artifactId>pi4j-plugin-gpiod</artifactId>
             <version>${pi4j.version}</version>
         </dependency-->
-       <!--dependency>
-           <groupId>com.pi4j</groupId>
-           <artifactId>pi4j-plugin-linuxfs</artifactId>
-           <version>${pi4j.version}</version>
-       </dependency-->
+        <!--dependency>
+            <groupId>com.pi4j</groupId>
+            <artifactId>pi4j-plugin-linuxfs</artifactId>
+            <version>${pi4j.version}</version>
+        </dependency-->
         <dependency>
-               <groupId>net.java.dev.jna</groupId>
-               <artifactId>jna</artifactId>
-               <version>5.12.1</version>
-           </dependency>
+            <groupId>net.java.dev.jna</groupId>
+            <artifactId>jna</artifactId>
+            <version>5.12.1</version>
+        </dependency>
         <dependency>
-           <groupId>org.slf4j</groupId>
-           <artifactId>slf4j-api</artifactId>
-           <version>${slf4j.version}</version>
-       </dependency>
-       <dependency>
-           <groupId>org.slf4j</groupId>
-           <artifactId>slf4j-simple</artifactId>
-           <version>${slf4j.version}</version>
-       </dependency>
-          <!-- include Pi4J Core -->
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>${slf4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>${slf4j.version}</version>
+        </dependency>
+        <!-- include Pi4J Core -->
         <dependency>
             <groupId>com.pi4j</groupId>
             <artifactId>pi4j-core</artifactId>
@@ -119,15 +130,15 @@
         <!--- log4j - version 2   -->
 
         <!-- include Pi4J Plugins (Platforms and I/O Providers) -->
-        <dependency>
+        <!--dependency>
             <groupId>com.pi4j</groupId>
             <artifactId>pi4j-plugin-raspberrypi</artifactId>
             <version>${pi4j.version}</version>
-        </dependency>
+        </dependency-->
         <dependency>
             <groupId>com.pi4j</groupId>
             <artifactId>pi4j-drivers</artifactId>
-            <version>1.1.1-SNAPSHOT</version>
+            <version>${pi4j-driver.version}</version>
         </dependency>
         <dependency>
             <groupId>org.jetbrains</groupId>
@@ -190,19 +201,19 @@
             </plugin-->
 
             <!-- INCLUDE SOURCE JAR -->
-             <plugin>
+            <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-source-plugin</artifactId>
-                 <version>${maven-source-plugin.version}</version>
-                 <executions>
-                     <execution>
-                         <id>attach-sources</id>
-                         <goals>
-                             <goal>jar</goal>
-                         </goals>
-                     </execution>
-                 </executions>
-             </plugin>
+                <version>${maven-source-plugin.version}</version>
+                <executions>
+                    <execution>
+                        <id>attach-sources</id>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
 
             <!-- INCLUDE JAVADOC JAR -->
             <!--plugin>
@@ -282,7 +293,7 @@
                         <argument>--module-path</argument>
                         <argument>${project.build.directory}/distribution</argument>
                         <argument>--module</argument>
-                      <!-- <argument>com.pi4j.devices.tca9548/com.pi4j.devices.tca9548.SampleTca9548App</argument>  -->
+                        <!-- <argument>com.pi4j.devices.tca9548/com.pi4j.devices.tca9548.SampleTca9548App</argument>  -->
                         <argument>com.pi4j.devices.mcp23008/com.pi4j.devices.mcp23008.Mcp23008App</argument>
                     </arguments>
                 </configuration>
@@ -373,7 +384,7 @@
             <plugin>
                 <artifactId>maven-antrun-plugin</artifactId>
                 <version>${maven-antrun-plugin.version}</version>
-                 <executions>
+                <executions>
                     <execution>
                         <id>copySH</id>
                         <phase>install</phase>
@@ -460,4 +471,4 @@
             </plugin>
         </plugins>
     </build>
-</project>
+</project>

src/main/java/com/pi4j/devices/mcp4725/MCP4725App.java

@@ -15,7 +15,7 @@
 public class MCP4725App {
 
     static void main(String[] args) {
-        System.setProperty("org.slf4j.simpleLogger.defaultLogLevel", "OFF");
+        System.setProperty("org.slf4j.simpleLogger.defaultLogLevel", "INFO");
 
         Logger logger = LoggerFactory.getLogger(MCP4725App.class);
         logger.trace(">>> Enter: init");

src/main/java/com/pi4j/devices/mcp4728/MCP4728App.java

@@ -41,7 +41,7 @@
 public class MCP4728App {
 
     static void main(String[] args) {
-        System.setProperty("org.slf4j.simpleLogger.defaultLogLevel", "OFF");
+        System.setProperty("org.slf4j.simpleLogger.defaultLogLevel", "iNFO");
         Logger logger = LoggerFactory.getLogger(MCP4728App.class);
         logger.trace(">>> Enter: init");
 

src/main/java/com/pi4j/devices/sg90/README.md

@@ -0,0 +1,60 @@
+#  SG90  servo motor
+
+https://www.scribd.com/document/420327552/Servo
+https://www.friendlywire.com/projects/ne555-servo-safe/SG90-datasheet.pdf
+
+These devices do not have a customary DataSheet.  Most servo devices provide limited specifications 
+for required pulse width, they just say 1 - 2 millisecond.
+
+The SG90 defines a specific PWM interface and exactly how the PWN signal
+controls the servo. There are many different manufacturers of the SG90 servo. 
+The pulse width required for setting the servo at 0 degrees or 180 degrees varies by 
+manufacturer. The driver by default uses the pulse width timing as 
+(low)1000 - (high)2000 microseconds. The user of this example application can change these defaults when first 
+invoking the program.
+
+If the servo does not rotate to the desired position, Example: to rotate closer to the 0 degree 
+point reduce the -low argument, to rotate closer to the 180 degree point increase the
+-high argument. The -low -high change should be balanced or 90 degree will not properly align.
+Meaning if you reduce the -low by 200, you should increase the -high by 200, or visa-versa. 
+
+
+
+ Connections between the SG90 servo and the Raspberry Pi
+  SG90                Pi
+Grey/Brown          Ground
+Red                 5V
+Yellow              GPIO18  config.sys contains dtoverlay=pwm-2chan
+
+
+
+1. ./mvnw clean package
+2. cd target/distribution
+3. ./runSG90.sh   args
+
+-c      channel   (default 2)   set the channel, depending on config.txt 1 2 3 4  
+-low    float pulse width for 0 degree microseconds
+-high   float pulse width for 180 degree microseconds
+-q      quit
+-h      help
+
+./runSG90.sh begins execution of the application, you then enter the desired servo degree of rotation.
+Then continue entering the requested degree value, or any key will exist the program.
+
+Set ouput shaft at 120 degree
+./runSG90.sh   
+         120     
+
+Driver defaults to 0 degree requires a 1000 micro second pulse, 180 degree requires a 2000 microsecond pulse
+If your servo requires different pulse widths
+
+Set low high pulse widths, then set output shaft at 120 degree
+./runSG90.sh  -low 600 -high 2400 
+     120
+
+My SG90 aligns correctly with these values
+./runSG90.sh  -low 550 -high 2450
+
+If your configuration uses a channel other than 2
+./runSG90.sh -c 1 
+    120