diff --git a/README.md b/README.md
index ad11385..f72552d 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ Simulation in Gazebo using a plugin that runs original Arduino code is implement
 
 <img src="docs/img/schematics.svg" width=800 alt="Flix schematics">
 
-You can also check a user contributed [variant of complete circuit diagram](https://github.com/okalachev/flix/issues/3#issue-2066079898) of the drone.
+You can also check a user contributed [variant of complete circuit diagram](https://miro.com/app/board/uXjVN-dTjoo=/) of the drone.
 
 *\* — SBUS inverter is not needed as ESP32 supports [software pin inversion](https://github.com/bolderflight/sbus#inverted-serial).*
 
diff --git a/flix/imu.ino b/flix/imu.ino
index acbade5..9d0107b 100644
--- a/flix/imu.ino
+++ b/flix/imu.ino
@@ -6,10 +6,9 @@
 #include <SPI.h>
 #include <MPU9250.h>
 
-#define IMU_CS_PIN 4 // chip-select pin for IMU SPI connection
 #define LOAD_GYRO_CAL false
 
-MPU9250 IMU(SPI, IMU_CS_PIN);
+MPU9250 IMU(SPI, SS);
 
 void setupIMU() {
 	Serial.println("Setup IMU, stand still");