diff --git a/zephcore/boards/nrf52840/thinknode_m3/board.conf b/zephcore/boards/nrf52840/thinknode_m3/board.conf
index 28c0dd7..2e886eb 100644
--- a/zephcore/boards/nrf52840/thinknode_m3/board.conf
+++ b/zephcore/boards/nrf52840/thinknode_m3/board.conf
@@ -30,6 +30,3 @@ CONFIG_PWM=y
 
 # ThinkNode M3 has no display — enable LED heartbeat
 CONFIG_ZEPHCORE_UI_DISPLAY=n
-
-# RX duty cycle — note LR1110 guard is active, safe for battery-powered use
-CONFIG_ZEPHCORE_LORA_RX_DUTY_CYCLE=y
diff --git a/zephcore/boards/nrf52840/thinknode_m3/board.overlay b/zephcore/boards/nrf52840/thinknode_m3/board.overlay
index f5b7ba7..ce3cc27 100644
--- a/zephcore/boards/nrf52840/thinknode_m3/board.overlay
+++ b/zephcore/boards/nrf52840/thinknode_m3/board.overlay
@@ -2,7 +2,7 @@
  * ThinkNode M3 board overlay - additional ZephCore-specific configuration
  * SPDX-License-Identifier: Apache-2.0
  *
- * GPS control pins for the GPS module (chip TBD, generic NMEA at 9600 baud):
+ * GPS control pins for the GPS module (generic NMEA at 9600 baud):
  * - GPS_POWER (P0.14) - Main power enable (always HIGH, gpio-hog)
  * - GPS_EN    (P0.21) - Standby control (HIGH = awake, LOW = standby)
  * - GPS_RESET (P0.25) - Reset (GPS_RESET_ACTIVE = LOW, REINIT pin)
@@ -15,7 +15,7 @@
  */
 
 / {
-	/* GPS standby control - P0.21 (GPS_EN, HIGH = active/awake) */
+	/* GPS standby control - P0.21 (GPS_EN, HIGH = active/awake, LOW = standby) */
 	gps_en: gps-enable {
 		compatible = "gpio-leds";
 		gps_enable_pin: gps_enable {
@@ -24,8 +24,20 @@
 		};
 	};
 
+	/* GPS hardware reset - P0.25 (GPS_RESET, active-LOW)
+	 * Asserted (pin LOW) on standby entry to halt the module cleanly.
+	 * Released (pin HIGH) after GPS_EN on wake with a brief reset pulse. */
+	gps_rst: gps-reset {
+		compatible = "gpio-leds";
+		gps_reset_pin: gps_reset {
+			gpios = <&gpio0 25 GPIO_ACTIVE_LOW>;
+			label = "GPS Reset";
+		};
+	};
+
 	aliases {
 		gps-enable = &gps_enable_pin;
+		gps-reset  = &gps_reset_pin;
 	};
 };
 
diff --git a/zephcore/boards/nrf52840/thinknode_m3/thinknode_m3.dts b/zephcore/boards/nrf52840/thinknode_m3/thinknode_m3.dts
index c098924..25466d5 100644
--- a/zephcore/boards/nrf52840/thinknode_m3/thinknode_m3.dts
+++ b/zephcore/boards/nrf52840/thinknode_m3/thinknode_m3.dts
@@ -7,8 +7,8 @@
  * Hardware (from Arduino variant.h / platformio.ini):
  * - nRF52840 SoC with BLE
  * - LR1110 LoRa radio on SPI1 (TCXO 3.3V, DIO5/DIO6 RF switch)
- * - GPS module on UART0 (9600 baud, generic NMEA; chip TBD)
- *   Control: GPS_POWER=P0.14 (always on), GPS_EN=P0.21 (standby), GPS_RESET=P0.25
+ * - GPS module on UART0 (9600 baud, generic NMEA)
+ *   Control: GPS_POWER=P0.14 (always on), GPS_EN=P0.21 (standby), GPS_RESET=P0.25 (active-LOW)
  * - Battery ADC on AIN3 (P0.05), 2:1 voltage divider
  * - LEDs: GREEN=P1.03, RED=P1.01 (active-low), POWER=P0.29 (always on via overlay)
  * - Button on P0.12 (active-low, pull-up), single button with multi-tap
@@ -174,13 +174,14 @@
 
 /* GPS on UART0 (9600 baud)
  *
- * Using gnss-nmea-generic (passive NMEA listener) — the GPS chip is unknown
- * but the Arduino firmware uses MicroNMEA (generic NMEA parser only, no
- * proprietary commands). The module is controlled via 3 GPIOs in the overlay:
- * GPS_POWER=P0.14 (always on), GPS_EN=P0.21 (standby via gps-enable alias).
+ * Using gnss-nmea-generic (passive NMEA listener) — Arduino reference code
+ * uses MicroNMEA (generic NMEA parser only, no proprietary commands), so
+ * chip-specific drivers are neither needed nor safe.
+ * GPS_POWER=P0.14 (always on hog), GPS_EN=P0.21 (wake/standby),
+ * GPS_RESET=P0.25 (active-LOW, pulsed on wake, asserted during standby).
  *
- * zephyr,deferred-init: GPS module needs GPIO power-up (GPS_EN HIGH) before
- * NMEA output. ZephyrGPSManager handles power-up then calls device_init(). */
+ * zephyr,deferred-init: GPS needs GPIO power-up (GPS_EN HIGH) before NMEA
+ * output. ZephyrGPSManager handles power-up then calls device_init(). */
 &uart0 {
 	compatible = "nordic,nrf-uarte";
 	status = "okay";