From 86326f294dfef0a1509209a204107fd03f4b047e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Heath=20Dutton=F0=9F=95=B4=EF=B8=8F?=
 <heathdutton@gmail.com>
Date: Thu, 8 Jan 2026 01:08:41 -0500
Subject: [PATCH] Fix TSL2591 detection by adding command bit to register read
 (#9215)

---
 src/detect/ScanI2CTwoWire.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/detect/ScanI2CTwoWire.cpp b/src/detect/ScanI2CTwoWire.cpp
index 8e91d1787..83acfdc18 100644
--- a/src/detect/ScanI2CTwoWire.cpp
+++ b/src/detect/ScanI2CTwoWire.cpp
@@ -487,7 +487,7 @@ void ScanI2CTwoWire::scanPort(I2CPort port, uint8_t *address, uint8_t asize)
                 }
                 break;
             case TSL25911_ADDR:
-                registerValue = getRegisterValue(ScanI2CTwoWire::RegisterLocation(addr, 0x12), 1);
+                registerValue = getRegisterValue(ScanI2CTwoWire::RegisterLocation(addr, 0xA0 | 0x12), 1);
                 if (registerValue == 0x50) {
                     type = TSL2591;
                     logFoundDevice("TSL25911", (uint8_t)addr.address);