diff --git a/code/nrf-connect/prstlib/boards/arm/bparasite_nrf52833/bparasite_nrf52833_2_0_0.overlay b/code/nrf-connect/prstlib/boards/arm/bparasite_nrf52833/bparasite_nrf52833_2_0_0.overlay
index cebbe1d..d70d2e4 100644
--- a/code/nrf-connect/prstlib/boards/arm/bparasite_nrf52833/bparasite_nrf52833_2_0_0.overlay
+++ b/code/nrf-connect/prstlib/boards/arm/bparasite_nrf52833/bparasite_nrf52833_2_0_0.overlay
@@ -6,6 +6,12 @@
 		io-channels = <&adc 1>;
 	};
 
+	soil_calibration_coeffs: soil_calibration_coeffs {
+		compatible = "soil-calibration-coeffs";
+		dry = <334000 110000 (-15300)>;
+		wet = <299000 (-83100) 11200>;
+	};
+
 	ctrl {
 		compatible = "gpio-keys";
 		photo_transistor_enable: photo_transistor_enable {
diff --git a/code/nrf-connect/prstlib/boards/arm/bparasite_nrf52840/bparasite_nrf52840_2_0_0.overlay b/code/nrf-connect/prstlib/boards/arm/bparasite_nrf52840/bparasite_nrf52840_2_0_0.overlay
index cebbe1d..d70d2e4 100644
--- a/code/nrf-connect/prstlib/boards/arm/bparasite_nrf52840/bparasite_nrf52840_2_0_0.overlay
+++ b/code/nrf-connect/prstlib/boards/arm/bparasite_nrf52840/bparasite_nrf52840_2_0_0.overlay
@@ -6,6 +6,12 @@
 		io-channels = <&adc 1>;
 	};
 
+	soil_calibration_coeffs: soil_calibration_coeffs {
+		compatible = "soil-calibration-coeffs";
+		dry = <334000 110000 (-15300)>;
+		wet = <299000 (-83100) 11200>;
+	};
+
 	ctrl {
 		compatible = "gpio-keys";
 		photo_transistor_enable: photo_transistor_enable {