diff --git a/firmware/main/src/sensor.c b/firmware/main/src/sensor.c
index a527387..483f1a3 100644
--- a/firmware/main/src/sensor.c
+++ b/firmware/main/src/sensor.c
@@ -4,7 +4,7 @@
 
 #define SDA_PIN GPIO_NUM_2
 #define CLK_PIN GPIO_NUM_14
-#define SENSOR_ADDR 0x45 //default address is 0x44 (pin 2 logic low). We chose 0x45 with logic high
+#define SENSOR_ADDR 0x45 //default address is 0x44 (pin 2 logic low). We chose 0x45 with logic high in v0.9 and 0x44 with newer versions where second sensor is removed.
 
 
 // Dummy implementations for the purpose of this example