G-CU

Contents

• Working Status
• Data Format
• Attention

Working Status

Indicator	Status	Meaning
LED1	Red	System is powered on
	Off	System is powered off
LED2	Green	Battery is charging
	Off	Battery is fully charged / Battery not installed
RGB LED (U6)	Off	System is powered off / System is initializing
	White	Unable to Init the IMU Sensor
	Red-Green-Blue (Cycle)	System is starting / Low Battery
	Red	Connecting to WiFi / Unable to connect to WiFi
	Red (Blink)	Unable to set RTC
	Cyan	Setting RTC using NTP Server
	Cyan (Blink 3 Times)	Unable to set RTC from NTP Server / Setting RTC using extern Chip(BQ32002)
	Yellow	Waitting for transfer data / [TCP Mode]Waiting for connect to TCP Server
	Green	Transferring data

Data Format(Little-endian)

Four_Bytes_Sensors_Data

START		DN	SN	TIME				TIMEMS		S_1
0x5a	0x5a	0x00	0x04	0x64	0xac	0xd6	0xe1	0x01	0xf4	0x30	0x8e	0x00	0x00
S_...				Magnetometer_x				Magnetometer_y
...				0x0b	0xb8	0xa5	0xa5	0x0b	0xb8	0xa5	0xa5
Magnetometer_z				Gyroscope_x				Gyroscope_y
0x0b	0xb8	0xa5	0xa5	0x0b	0xb8	0xa5	0xa5	0x0b	0xb8	0xa5	0xa5
Gyroscope_z				Accelerometer_x				Accelerometer_y
0x0b	0xb8	0xa5	0xa5	0x0b	0xb8	0xa5	0xa5	0x0b	0xb8	0xa5	0xa5
Accelerometer_z				END
0x0b	0xb8	0x0b	0xb8	0xa5	0xa5

Two_Bytes_Sensors_Data

START		DN	SN	TIME				TIMEMS		S_1
0x5a	0x5a	0x00	0x04	0x64	0xac	0xd6	0xe1	0x01	0xf4	0x30	0x8e
S_2		S_...		Magnetometer_x				Magnetometer_y
0x31	0x66	...		0x0b	0xb8	0xa5	0xa5	0x0b	0xb8	0xa5	0xa5
Magnetometer_z				Gyroscope_x				Gyroscope_y
0x0b	0xb8	0xa5	0xa5	0x0b	0xb8	0xa5	0xa5	0x0b	0xb8	0xa5	0xa5
Gyroscope_z				Accelerometer_x				Accelerometer_y
0x0b	0xb8	0xa5	0xa5	0x0b	0xb8	0xa5	0xa5	0x0b	0xb8	0xa5	0xa5
Accelerometer_z				END
0x0b	0xb8	0x0b	0xb8	0xa5	0xa5

Fields of the Data Packet

Field Name	Size (Bytes)	Description
START	2	Two 0x5a identifying the packet
DN	1	Device NO.
SN	1	Total number of the Pressure Sensors
TIME	4	Unix Time
TIMEMS	2	Million Seconds
S_x	4 or 2	Value of the Pressure Sensor NO. x
Magnetometer_xyz	12	Value of the Magnetometer_xyz(Float)
Gyroscope_xyz	12	Value of the Gyroscope_xyz(Float)
Accelerometer_xyz	12	Value of the Accelerometer_xyz(Float)
END	2	Two 0xa5 ending the packet

* The packet format can be customized by changing the value of the function flag.

IO port(Chip on top)(board v2.0.B)

Left(2 pin)	Right(2 pin)
GPIO1(GIN0)	GPIO7(GIN6)
GPIO2(GIN1)	GPIO19
GPIO3(GIN2)	GPIO20
GPIO4(GIN3)	GPIO21
GPIO5(GIN4)	GPIO35
GPIO6(GIN5)	GPIO36

* Please change the value of analogReadIO[] and SelectIO[] in Conector IO.

Attention

For code v2.0

Due to changes in IMU sensor, the following matters need to be noted.

• New Library in Arduino must be installed, please check Arduino Library.

For board v2.0.B

Due to changes in IMU sensors and the removal of the RTC chip, the following matters need to be noted.

• When using code v2.0, the value of IMU_chip must set to GCU_BMI270_BMM150.
• When using code v2.0, the value of RTC_chip must set to GCU_FLAG_OFF.
• IF you need 2 bytes sensors data, please set the value of sensors_dataformat_define to Two_Bytes_Sensors_Data in code v2.0.
• It is not recommended to use versions of the code earlier than code v2.0.

For board v1.0

Due to I2C Address Conflict, the following matters need to be noted.

• If you want to use IMU Sensor, board v1.0 must update to board v1.1 （Contact YU） or board v1.0.R.
• If you choose to remove the RTC chip, you need to disable the RTC Function from code v1.1.
• If you want to use the board v1.0(Don't use IMU Sensor), you need to set the IMU_flag to 0 using code v1.1.

For code v1.0

Due to data structure, the following matters need to be noted.

• Now all data transmission changed to Little-endian.

For board v0.0 or v0.1

Due to issues such as hardware design, the following matters need to be noted.

• GPIO38 (In the middle of U11) cannot be used.
• Switch status is negetive.