diff --git a/i2c_firmware/README.md b/i2c_firmware/README.md
index c952831..3b86fc9 100644
--- a/i2c_firmware/README.md
+++ b/i2c_firmware/README.md
@@ -1,6 +1,6 @@
 # OpenWRT 24.10.4 Firmware with GPIO I²C for GL.iNet XE300
 
-Custom OpenWRT build enabling **GPIO-based I²C master** on the GL.iNet XE300 (QCA9531) using `i2c-gpio` driver and clean DTS integration.
+Custom OpenWRT build enabling **GPIO-based I²C master** on the XE300 using `i2c-gpio` driver and clean DTS integration.
 
 ## Locate & Edit DTS
 
@@ -30,6 +30,12 @@ i2cdetect -y 0
 cat /sys/kernel/debug/gpio
 i2cdump -y 0 0x48  # Adjust address accordingly
 
+## Notes
+
+- ✅ If you connect the resistors after boot, bus works great (ADS1115 detected at 0x48).
+- ✅ Reboots are fine — problem only occurs on cold boot / full power cycle.
+- ✅ The ADS1115 can be powered before boot or after — no issue.
+- ❌ The presence of 3.3V on SDA/SCL at boot causes the SoC to hang.
 
 Ubuntu 22.04+ build tools: