diff --git a/shared_i2c/README.md b/shared_i2c/README.md
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+## MenuConfig
+
+menu "Application Configuration"
+    config I2C_MASTER_SCL_IO
+        int "I2C Master SCL GPIO"
+        default 22
+        range 0 39
+        help
+            GPIO number for I2C master clock.
+
+    config I2C_MASTER_SDA_IO
+        int "I2C Master SDA GPIO"
+        default 21
+        range 0 39
+        help
+            GPIO number for I2C master data.
+
+    config I2C_MASTER_FREQ_HZ
+        int "I2C Master Clock Frequency (Hz)"
+        default 100000
+        help
+            I2C master clock frequency in Hz.
+endmenu
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