PETRONE / LINK / Protocol / Intro
Modified : 2017.10.18

1. Introduce PETRONE LINK

PETRONE LINK(LINK) is communication module for connect and control PETRONE. PETRONE and LINK communicat using Bluetooth Low Energy(BLE). But, LINK user can connect to PETRONE use only serial communication.

2. Data transmission structure

Communicating with LINK device, the data block configuration is as follows:

0	1	2	3	...	N-1	N
Start code		Header		Data	CRC16
Start code		DataType	Length	Data	CRC16
0x0A	0x55	-	-	-	-	-

Each item is explained as follows.

Area	Description
Start code	Data transmission notice
Header	Length of data that follows header
Data	Data
CRC16	Check the header and the data were delivered correctly.

http://www.menie.org/georges/embedded/crc16.html |

Data and the CRA16 zone use Little Endian. When Little Endian is present, If more than two bytes, low byte is front of the array. You can change it conveniently using Bitconverter in C#.

	0x1234	0x12345678
Big Endian	[ 12 34 ]	[ 12 34 56 78 ]
Little Endian	[ 34 12 ]	[ 78 56 34 12 ]

3. Precautions in use

To control the LINK module, typically use Command.
When sending data to LINK module, the device will send Ack with the exception of a few commands.
LINK module communicates changing the behavior mode of LINK when it is in Active mode.
The device scan is operate for 1.6 seconds and will not use serial communication until the scan is complete.

4. Configure parameters for serial port

Area	Setting value
Baud Rate	115200
Parity	None
Data Bits	8
Stop Bits	1

5. Driver install

LINK module is using Silicon Labs CP2104 for serial communication. If Windows™ can not install the USB driver automatically, please visit the site below to obtain and install the drivers for your OS.

CP210x USB to UART Bridge VCP Drivers

PETRONE

PETRONE Link

Index