diff --git a/meshtastic/admin.proto b/meshtastic/admin.proto
index 4b6eff8..d622e0e 100644
--- a/meshtastic/admin.proto
+++ b/meshtastic/admin.proto
@@ -506,6 +506,11 @@ message AdminMessage {
      * Tell the node to reset into the OTA Loader
      */
     OTAEvent ota_request = 102;
+
+    /*
+     * Parameters and sensor configuration
+     */
+    SensorConfig sensor_config = 103;
   }
 }
 
@@ -635,3 +640,64 @@ message KeyVerificationAdmin {
    */
   optional uint32 security_number = 4;
 }
+
+message SensorConfig {
+  /*
+   * SCD4X CO2 Sensor configuration
+   */
+  SCD4X_config scd4x_config = 1;
+
+  /*
+   * SEN5X PM Sensor configuration
+   */
+  SEN5X_config sen5x_config = 2;
+}
+
+message SCD4X_config {
+  /*
+   * Set Automatic self-calibration enabled
+   */
+  optional bool set_asc = 1;
+
+  /*
+   * Recalibration target CO2 concentration in ppm (FRC or ASC)
+   */
+  optional uint32 set_target_co2_conc = 2;
+
+  /*
+   * Reference temperature in degC
+   */
+  optional float set_temperature = 3;
+
+  /*
+   * Altitude of sensor in meters above sea level. 0 - 3000m (overrides ambient pressure)
+   */
+  optional uint32 set_altitude = 4;
+
+  /*
+   * Sensor ambient pressure in Pa. 70000 - 120000 Pa (overrides altitude)
+   */
+  optional uint32 set_ambient_pressure = 5;
+
+  /*
+   * Perform a factory reset of the sensor
+   */
+  optional bool factory_reset = 6;
+
+  /*
+   * Power mode for sensor (true for low power, false for normal)
+   */
+  optional bool set_power_mode = 7;
+}
+
+message SEN5X_config {
+  /*
+   * Reference temperature in degC
+   */
+  optional float set_temperature = 1;
+
+  /*
+   * One-shot mode (true for low power - one-shot mode, false for normal - continuous mode)
+   */
+  optional bool set_one_shot_mode = 2;
+}
diff --git a/meshtastic/telemetry.proto b/meshtastic/telemetry.proto
index 4db51b7..8b70ade 100644
--- a/meshtastic/telemetry.proto
+++ b/meshtastic/telemetry.proto
@@ -816,3 +816,38 @@ message Nau7802Config {
    */
   float calibrationFactor = 2;
 }
+
+/*
+ * SEN5X State, for saving to flash
+ */
+message SEN5XState {
+  /*
+   * Last cleaning time for SEN5X
+   */
+  uint32 last_cleaning_time = 1;
+
+  /*
+   * Last cleaning time for SEN5X - valid flag
+   */
+  bool last_cleaning_valid = 2;
+
+  /*
+   * Config flag for one-shot mode (see admin.proto)
+   */
+  bool one_shot_mode = 3;
+
+  /*
+   * Last VOC state time for SEN55
+   */
+  optional uint32 voc_state_time = 4;
+
+  /*
+   * Last VOC state validity flag for SEN55
+   */
+  optional bool voc_state_valid = 5;
+
+  /*
+   * VOC state array (8x uint8t) for SEN55
+   */
+  optional fixed64 voc_state_array = 6;
+}