diff --git a/.github/workflows/maven.yaml b/.github/workflows/maven.yaml
new file mode 100644
index 0000000..0004020
--- /dev/null
+++ b/.github/workflows/maven.yaml
@@ -0,0 +1,36 @@
+# This workflow will build a Java project with Maven, and cache/restore any dependencies to improve the workflow execution time
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-maven
+
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+name: Java CI with Maven
+
+on:
+  push:
+    branches: [ "**" ]
+  pull_request:
+    branches: [ "**" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up JDK 17
+      uses: actions/setup-java@v4
+      with:
+        java-version: '17'
+        distribution: 'temurin'
+        cache: maven
+    - name: Build with Maven
+      run: mvn -B package --file pom.xml
+
+    # Optional: Uploads the full dependency graph to GitHub to improve the quality of Dependabot alerts this repository can receive
+    - name: Update dependency graph
+      uses: advanced-security/maven-dependency-submission-action@571e99aab1055c2e71a1e2309b9691de18d6b7d6
+
diff --git a/.gitignore b/.gitignore
index 8e99583..c98b361 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /target
 gpsd4java.iml
 .idea
+.cache
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..48d069e
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,15 @@
+---
+repos:
+  - repo: https://github.com/0x08/google-style-precommit-hook
+    rev: 503fa7c491becee130be17a10b03b275ce6f2330
+    hooks:
+      - id: google-style-java
+  - repo: https://github.com/pre-commit/mirrors-prettier
+    rev: v3.0.0-alpha.0
+    hooks:
+      - id: prettier
+  - repo: "https://github.com/adrienverge/yamllint"
+    rev: v1.27.1
+    hooks:
+      - id: "yamllint"
+        args: [--strict]
diff --git a/src/main/java/de/taimos/gpsd4java/backend/ResultParser.java b/src/main/java/de/taimos/gpsd4java/backend/ResultParser.java
index 620bd6e..243db38 100644
--- a/src/main/java/de/taimos/gpsd4java/backend/ResultParser.java
+++ b/src/main/java/de/taimos/gpsd4java/backend/ResultParser.java
@@ -254,6 +254,7 @@ protected IGPSObject parsePRN(final JSONObject json) {
     sat.setElevation(json.optInt("el", -1));
     sat.setSignalStrength(json.optInt("ss", -1));
     sat.setUsed(json.optBoolean("used", false));
+    sat.setGnssId(json.optInt("gnssid", -1));
     gps = sat;
     return gps;
   }
diff --git a/src/main/java/de/taimos/gpsd4java/types/SATObject.java b/src/main/java/de/taimos/gpsd4java/types/SATObject.java
index 3c48c85..44ac15b 100644
--- a/src/main/java/de/taimos/gpsd4java/types/SATObject.java
+++ b/src/main/java/de/taimos/gpsd4java/types/SATObject.java
@@ -36,6 +36,8 @@ public class SATObject implements IGPSObject {
 
   private int signalStrength = -1;
 
+  private int gnssId = -1;
+
   private boolean used = false;
 
   /**
@@ -132,6 +134,24 @@ public void setUsed(final boolean used) {
     this.used = used;
   }
 
+  /**
+   * The GNSSID field of the satellite, if available.
+   *
+   * @return gnssId
+   */
+  public int getGnssId() {
+    return gnssId;
+  }
+
+  /**
+   * The GNSSID field of the satellite, if available.
+   *
+   * @param gnssId the GNSSID field to set
+   */
+  public void setGnssId(final int gnssId) {
+    this.gnssId = gnssId;
+  }
+
   @Override
   public int hashCode() {
     final int prime = 31;
@@ -145,6 +165,8 @@ public int hashCode() {
     result = (prime * result) + (int) (temp ^ (temp >>> 32));
     temp = Double.doubleToLongBits(this.signalStrength);
     result = (prime * result) + (int) (temp ^ (temp >>> 32));
+    temp = Double.doubleToLongBits(this.gnssId);
+    result = (prime * result) + (int) (temp ^ (temp >>> 32));
     result = (prime * result) + ((this.used) ? 1 : 0);
     return result;
   }
diff --git a/src/test/java/de/taimos/gpsd4java/backend/ResultParserTest.java b/src/test/java/de/taimos/gpsd4java/backend/ResultParserTest.java
new file mode 100644
index 0000000..4bfb530
--- /dev/null
+++ b/src/test/java/de/taimos/gpsd4java/backend/ResultParserTest.java
@@ -0,0 +1,199 @@
+package de.taimos.gpsd4java.backend;
+
+import de.taimos.gpsd4java.types.ENMEAMode;
+import de.taimos.gpsd4java.types.SATObject;
+import de.taimos.gpsd4java.types.SKYObject;
+import de.taimos.gpsd4java.types.TPVObject;
+import de.taimos.gpsd4java.types.subframes.IONOObject;
+import org.json.JSONArray;
+import org.json.JSONObject;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+public class ResultParserTest {
+
+  private ResultParser resultParser;
+
+  @Before
+  public void before() {
+    this.resultParser = new ResultParser();
+  }
+
+  @Test
+  public void testSatObject() {
+    final JSONObject json = new JSONObject();
+    json.put("PRN", 12);
+    json.put("gnssid", 44);
+    json.put("svid", 12);
+    json.put("az", 229);
+    json.put("el", 24);
+    json.put("prRes", 22.9);
+    json.put("qual", 1);
+    json.put("ss", 0);
+    json.put("used", false);
+    json.put("health", 1);
+    final SATObject satObject = (SATObject) this.resultParser.parsePRN(json);
+    Assert.assertEquals(12, satObject.getPRN());
+    Assert.assertEquals(44, satObject.getGnssId());
+    Assert.assertEquals(229, satObject.getAzimuth());
+    Assert.assertEquals(24, satObject.getElevation());
+    Assert.assertFalse(satObject.getUsed());
+    Assert.assertEquals(0, satObject.getSignalStrength());
+  }
+
+  @Test
+  public void testIonoObject() {
+    final JSONObject json = new JSONObject();
+    json.put("a0", 1.0);
+    json.put("a1", 2.0);
+    json.put("a2", 3.0);
+    json.put("b0", 11.0);
+    json.put("b1", 12.0);
+    json.put("b2", 13.0);
+    json.put("b3", 14.0);
+    json.put("A0", 21.0);
+    json.put("A1", 22.0);
+    json.put("tot", 31.0);
+    json.put("WNt", 100);
+    json.put("ls", 101);
+    json.put("WNlsf", 102);
+    json.put("DN", 103);
+    json.put("lsf", 104);
+    final IONOObject ionoObject = (IONOObject) this.resultParser.parseIONO(json);
+    Assert.assertEquals(1.0, ionoObject.getAlpha0(), 0);
+    Assert.assertEquals(2.0, ionoObject.getAlpha1(), 0);
+    Assert.assertEquals(3.0, ionoObject.getAlpha2(), 0);
+    Assert.assertEquals(11.0, ionoObject.getBeta0(), 0);
+    Assert.assertEquals(12.0, ionoObject.getBeta1(), 0);
+    Assert.assertEquals(13.0, ionoObject.getBeta2(), 0);
+    Assert.assertEquals(14.0, ionoObject.getBeta3(), 0);
+    Assert.assertEquals(21.0, ionoObject.getA0(), 0);
+    Assert.assertEquals(22.0, ionoObject.getA1(), 0);
+    Assert.assertEquals(31.0, ionoObject.getTot(), 0);
+    Assert.assertEquals(100, ionoObject.getWNt());
+    Assert.assertEquals(101, ionoObject.getLeap());
+    Assert.assertEquals(102, ionoObject.getWNlsf());
+    Assert.assertEquals(103, ionoObject.getDN());
+    Assert.assertEquals(104, ionoObject.getLsf());
+  }
+
+  @Test
+  public void testSkyObject() throws Exception {
+
+    final JSONObject json = new JSONObject();
+    json.put("device", "/dev/ttyUSB0");
+    json.put("time", "2025-02-11T08:39:29.000Z");
+    json.put("gdop", 1.29);
+    json.put("hdop", 0.61);
+    json.put("pdop", 1.16);
+    json.put("tdop", 0.56);
+    json.put("xdop", 0.38);
+    json.put("ydop", 0.49);
+    json.put("vdop", 0.99);
+    json.put("nSat", 2);
+
+    final JSONArray satellites = new JSONArray();
+    json.put("satellites", satellites);
+
+    final JSONObject sat1 = new JSONObject();
+    sat1.put("PRN", 6);
+    sat1.put("gnssid", 0);
+    sat1.put("svid", 6);
+    sat1.put("az", 110.0);
+    sat1.put("el", 2.0);
+    sat1.put("prRes", 11.0);
+    sat1.put("qual", 1);
+    sat1.put("ss", 0.0);
+    sat1.put("used", false);
+    sat1.put("health", 1);
+
+    final JSONObject sat2 = new JSONObject();
+    sat2.put("PRN", 10);
+    sat2.put("gnssid", 0);
+    sat2.put("svid", 10);
+    sat2.put("az", 303.0);
+    sat2.put("el", 14.0);
+    sat2.put("prRes", 30.3);
+    sat2.put("qual", 7);
+    sat2.put("ss", 48.0);
+    sat2.put("used", true);
+    sat2.put("health", 1);
+
+    satellites.put(sat1);
+    satellites.put(sat2);
+
+    final SKYObject skyObject = (SKYObject) this.resultParser.parseSKY(json);
+
+    Assert.assertEquals("/dev/ttyUSB0", skyObject.getDevice());
+    Assert.assertEquals(1739263169.0, skyObject.getTimestamp(), 0.0);
+    Assert.assertEquals(1.29, skyObject.getHypersphericalDOP(), 0.0);
+    Assert.assertEquals(0.61, skyObject.getHorizontalDOP(), 0.0);
+    Assert.assertEquals(1.16, skyObject.getSphericalDOP(), 0.0);
+    Assert.assertEquals(0.56, skyObject.getTimestampDOP(), 0.0);
+    Assert.assertEquals(0.38, skyObject.getLongitudeDOP(), 0.0);
+    Assert.assertEquals(0.49, skyObject.getLatitudeDOP(), 0.0);
+    Assert.assertEquals(0.99, skyObject.getAltitudeDOP(), 0.0);
+    Assert.assertEquals(2, skyObject.getSatellites().size());
+
+    final SATObject satObject1 = skyObject.getSatellites().get(0);
+    Assert.assertEquals(6, satObject1.getPRN());
+    Assert.assertEquals(0, satObject1.getGnssId());
+    Assert.assertEquals(110.0, satObject1.getAzimuth(), 0.0);
+    Assert.assertEquals(2.0, satObject1.getElevation(), 0.0);
+    Assert.assertEquals(0.0, satObject1.getSignalStrength(), 0.0);
+    Assert.assertFalse(satObject1.getUsed());
+
+    final SATObject satObject2 = skyObject.getSatellites().get(1);
+    Assert.assertEquals(10, satObject2.getPRN());
+    Assert.assertEquals(0, satObject2.getGnssId());
+    Assert.assertEquals(303.0, satObject2.getAzimuth(), 0.0);
+    Assert.assertEquals(14.0, satObject2.getElevation(), 0.0);
+    Assert.assertEquals(48.0, satObject2.getSignalStrength(), 0.0);
+    Assert.assertTrue(satObject2.getUsed());
+  }
+
+  @Test
+  public void testTpvObject() {
+
+    final JSONObject json = new JSONObject();
+    json.put("tag", "tag");
+    json.put("alt", 136.054);
+    json.put("epv", 0.835);
+    json.put("device", "/dev/ttyUSB0");
+    json.put("time", "2025-02-11T08:39:29.000Z");
+    json.put("ept", 0.005);
+    json.put("lat", 42.7045841);
+    json.put("lon", 12.1588884);
+    json.put("alt", 136.054);
+    json.put("epx", 1.411);
+    json.put("epy", 1.822);
+    json.put("epv", 0.835);
+    json.put("track", 144.6175);
+    json.put("speed", 22.693);
+    json.put("climb", 0.023);
+    json.put("epd", 9.1852);
+    json.put("eps", 3.51);
+    json.put("epc", 1.68);
+    json.put("mode", 3);
+
+    final TPVObject tpvObject = (TPVObject) this.resultParser.parseTPV(json);
+    Assert.assertEquals(136.054, tpvObject.getAltitude(), 0);
+    Assert.assertEquals(0.835, tpvObject.getAltitudeError(), 0);
+    Assert.assertEquals(0.023, tpvObject.getClimbRate(), 0);
+    Assert.assertEquals(1.68, tpvObject.getClimbRateError(), 0);
+    Assert.assertEquals(144.6175, tpvObject.getCourse(), 0);
+    Assert.assertEquals(9.1852, tpvObject.getCourseError(), 0);
+    Assert.assertEquals("/dev/ttyUSB0", tpvObject.getDevice());
+    Assert.assertEquals(42.7045841, tpvObject.getLatitude(), 0);
+    Assert.assertEquals(1.822, tpvObject.getLatitudeError(), 0);
+    Assert.assertEquals(12.1588884, tpvObject.getLongitude(), 0);
+    Assert.assertEquals(1.411, tpvObject.getLongitudeError(), 0);
+    Assert.assertEquals(ENMEAMode.ThreeDimensional, tpvObject.getMode());
+    Assert.assertEquals(22.693, tpvObject.getSpeed(), 0);
+    Assert.assertEquals(3.51, tpvObject.getSpeedError(), 0);
+    Assert.assertEquals("tag", tpvObject.getTag());
+    Assert.assertEquals(1739263169.0, tpvObject.getTimestamp(), 0);
+    Assert.assertEquals(0.005, tpvObject.getTimestampError(), 0);
+  }
+}