From 9d4fed9119d55788ba928efcf18c6a2be6a152ab Mon Sep 17 00:00:00 2001
From: liquidraver <504870+liquidraver@users.noreply.github.com>
Date: Sat, 13 Jun 2026 08:37:25 +0200
Subject: [PATCH] wismesh tag adc fix

---
 zephcore/boards/nrf52840/rak_wismesh_tag/rak_wismesh_tag.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zephcore/boards/nrf52840/rak_wismesh_tag/rak_wismesh_tag.dts b/zephcore/boards/nrf52840/rak_wismesh_tag/rak_wismesh_tag.dts
index d67af1f..26e3d9b 100644
--- a/zephcore/boards/nrf52840/rak_wismesh_tag/rak_wismesh_tag.dts
+++ b/zephcore/boards/nrf52840/rak_wismesh_tag/rak_wismesh_tag.dts
@@ -138,7 +138,7 @@
 	 * applied to 12-bit average with default ref (GAIN_1_6 + 0.6V internal = 3.6V FS). */
 	zephyr,user {
 		io-channels = <&adc 3>;
-		vbat-mv-multiplier = <6259>;  /* 1.73:1 divider, 3.6V ref; corrected from Arduino 3.0V AREF + nRF SAADC gain */
+		vbat-mv-multiplier = <5973>;  /* 1.73:1 divider, 3.6V ref; measured on hw (calc'd 6259 over-read ~4.7%) */
 	};
 
 	/* ---- Buzzer on PWM0 ---- */