diff --git a/Production/Firmware/chu_pico.uf2 b/Production/Firmware/chu_pico.uf2
index 8271789..55769af 100644
Binary files a/Production/Firmware/chu_pico.uf2 and b/Production/Firmware/chu_pico.uf2 differ
diff --git a/firmware/src/board_defs.h b/firmware/src/board_defs.h
index aac963d..15c4a32 100644
--- a/firmware/src/board_defs.h
+++ b/firmware/src/board_defs.h
@@ -8,7 +8,7 @@
 #define I2C_PORT i2c0
 #define I2C_SDA 16
 #define I2C_SCL 17
-#define I2C_FREQ 633*1000
+#define I2C_FREQ 620*1000
 
 #define I2C_HUB_EN 19
 
diff --git a/firmware/src/i2c_hub.h b/firmware/src/i2c_hub.h
index ee620d6..8459f94 100644
--- a/firmware/src/i2c_hub.h
+++ b/firmware/src/i2c_hub.h
@@ -28,7 +28,6 @@ static inline void i2c_hub_init()
 static inline void i2c_select(i2c_inst_t *i2c_port, uint8_t chn)
 {
     i2c_write_blocking_until(i2c_port, I2C_HUB_ADDR, &chn, 1, false, time_us_64() + 1000);
-    sleep_us(1);
 }
 
 #endif