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I have hooked up the BMG250 shuttle board to my Raspberry Pi 3 (I2C) and it is currently in suspend mode. I am able to read/write to registers such as GYR_CONF (0x42) and GYR_RANGE (0x43). So in order to change the PMU status from suspend mode to normal mode I execute the following line: bus.write_byte_data(0x68, 0x7E, 0x15) To check the PMU status I wrote: time.sleep(1) bus.read_i2c_block_data(0x68, 0x03, 1) And I keep getting PMU Status as 0. Instead of the integer 4 which would be representative of normal mode. Does anybody know how to fix this? Here is my full code: import smbus import time # Get I2C bus bus = smbus.SMBus(1) # I2C address of the device BMG250_DEFAULT_ADDRESS = 0x68 # BMG250 Register Map BMG250_REG_CHIPID = 0x00 # Chip ID Register BMG250_REG_ERR = 0x02 # Error Register BMG250_REG_PMU = 0x03 # PMU Status BMG250_REG_STATUS = 0x1B # Status Register BMG250_REG_CMD = 0x7E # Command Register BMG250_REG_NVCONF = 0x70 # Watchdog Timer BMG250_REG_NVM = 0x6A # NVM Programming BMG250_REG_IF = 0x6B # Interface Configuration BMG250_REG_ST = 0x6D # Self-Test Register BMG250_REG_X_LSB = 0x12 # X-axis Data LSB BMG250_REG_X_MSB = 0x13 # X-axis Data MSB BMG250_REG_Y_LSB = 0x14 # Y-axis Data LSB BMG250_REG_Y_MSB = 0x15 # Y-axis Data MSB BMG250_REG_Z_LSB = 0x16 # Z-axis Data LSB BMG250_REG_Z_MSB = 0x17 # Z-axis Data MSB BMG250_REG_TEMP = 0x20 # Temperature Register BMG250_REG_RANGE = 0x43 # Range Register BMG250_REG_DOR = 0x42 # Data Output Rate Register # BMG250 Range Register Configuration BMG250_RANGE_2000 = 0x00 # Full Scale = +/-2000dps BMG250_RANGE_1000 = 0x01 # Full Scale = +/-1000dps BMG250_RANGE_500 = 0x02 # Full Scale = +/-500dps BMG250_RANGE_250 = 0x03 # Full Scale = +/-250dps BMG250_RANGE_125 = 0x04 # Full Scale = +/-125dps # BMG250 Data Output Rate Register Configuration BMG250_1600_HZ = 0x2C # 1600 Hz Configuration # BMG250 PMU Configuration BMG250_PMUT = 0x11 # Gyroscope Temp Normal Mode BMG250_PMUN = 0x15 # Gyroscope Normal Mode BMG250_PMUF = 0x17 # Gyroscope Fast Mode BMG250_PMUSR = 0xB6 # Gyroscope Soft Reset # BMG250 NV Configuration BMG250_NVCONF = 0x00 # I2C Watchdog Timer Configuration time.sleep(1) """Select the Data Output Rate Register Configuration from the given provided value""" DOR1600 = (BMG250_1600_HZ) bus.write_byte_data(BMG250_DEFAULT_ADDRESS, BMG250_REG_DOR, DOR1600) time.sleep(1) value3 = bus.read_i2c_block_data(BMG250_DEFAULT_ADDRESS, BMG250_REG_DOR, 1) print("BMG250 Data Output Rate value: %s" %value3) time.sleep(1) """Select the PMU Status from the given provided value""" PMU_MODE = (BMG250_PMUN) bus.write_byte_data(BMG250_DEFAULT_ADDRESS, BMG250_REG_CMD, PMU_MODE) time.sleep(1) value1 = bus.read_i2c_block_data(BMG250_DEFAULT_ADDRESS, BMG250_REG_PMU, 1) time.sleep(0.1) print("BMG250 PMU value: %s" %value1) time.sleep(1) """Check the Error Register""" value6 = bus.read_i2c_block_data(BMG250_DEFAULT_ADDRESS, BMG250_REG_ERR, 1) print("BMG250 ERR value: %s" %value6) time.sleep(1) """Select the Range Register Configuration from the given provided value""" RANGE_CONFIG = (BMG250_RANGE_2000) bus.write_byte_data(BMG250_DEFAULT_ADDRESS, BMG250_REG_RANGE, RANGE_CONFIG) time.sleep(1) value4 = bus.read_i2c_block_data(BMG250_DEFAULT_ADDRESS, BMG250_REG_RANGE, 1) print("BMG250 RANGE value: %s" %value4) time.sleep(1) """Read from the Temperature Register""" value5 = bus.read_i2c_block_data(BMG250_DEFAULT_ADDRESS, BMG250_REG_TEMP, 2) time.sleep(0.1) print("BMG250 TEMP value: %s" %value5) time.sleep(1) class BMG250(): def __init__(self): self.read_gyro() def read_gyro(self): """Read data back from BMG250_REG_X_LSB(0x12), 6 bytes X-Axis LSB, X-Axis MSB, Y-Axis LSB, Y-Axis MSB, Z-Axis LSB, Z-Axis MSB""" data = bus.read_i2c_block_data(BMG250_DEFAULT_ADDRESS, BMG250_REG_X_LSB, 6) # Convert the data xGyro = data[1] * 256 + data[0] if xGyro > 32767 : xGyro -= 65536 yGyro = data[3] * 256 + data[2] if yGyro > 32767 : yGyro -= 65536 zGyro = data[5] * 256 + data[4] if zGyro > 32767 : zGyro -= 65536 return {'x' : xGyro, 'y' : yGyro, 'z' : zGyro} BMG250 = BMG250() i = 1 while i < 2: gyro = BMG250.read_gyro() time.sleep(0.1) print("X-Axis of Rotation : %f" %(gyro['x'])) print("Y-Axis of Rotation : %f" %(gyro['y'])) print("Z-Axis of Rotation : %f" %(gyro['z'])) print(" ************************************ ") time.sleep(1) i += 1   ... View more