diff --git a/doc/ESP32 pinout.xcf b/doc/ESP32 pinout.xcf
new file mode 100644
index 0000000..ae26ded
Binary files /dev/null and b/doc/ESP32 pinout.xcf differ
diff --git a/doc/IC connected to I2C on GPIO 17+18.xcf b/doc/IC connected to I2C on GPIO 17+18.xcf
new file mode 100644
index 0000000..910f97f
Binary files /dev/null and b/doc/IC connected to I2C on GPIO 17+18.xcf differ
diff --git a/doc/Trace for IC connected to I2C on GPIO 17+18.xcf b/doc/Trace for IC connected to I2C on GPIO 17+18.xcf
new file mode 100644
index 0000000..9e63b6c
Binary files /dev/null and b/doc/Trace for IC connected to I2C on GPIO 17+18.xcf differ
diff --git a/doc/Yeelight GPIO measurements.xlsx b/doc/Yeelight GPIO measurements.xlsx
index 0b7933e..b2d8a49 100644
Binary files a/doc/Yeelight GPIO measurements.xlsx and b/doc/Yeelight GPIO measurements.xlsx differ