--- a/sdkconfig	Sat Nov 23 22:31:49 2019 +0100
+++ b/sdkconfig	Sun Nov 24 11:34:36 2019 +0100
@@ -83,7 +83,7 @@
 CONFIG_I2C_MASTER_SCL=22
 CONFIG_I2C_MASTER_SDA=21
 CONFIG_I2C_MASTER_PORT_NUM=0
-CONFIG_I2C_MASTER_FREQUENCY=400000
+CONFIG_I2C_MASTER_FREQUENCY=200000
 CONFIG_ROT_ENC_A_GPIO=26
 CONFIG_ROT_ENC_B_GPIO=27
 CONFIG_ROT_ENC_SW_GPIO=14