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Here 3 – CAN GPS with M8P

14,990.00 12,000.00

Overview

The Here3 GPS is a high precision GNSS system that supports RTK mode, built with CAN protocol. It is also designed to be dust-proof and splash-proof up to a certain limit. Equipped with STM32F302 processor, the Here3 provides faster processing speed and better reliability.

The Here3 has built-in sensors including compass, gyroscope, accelerometer, and status LED. It runs on Chibios real-time operation system. Its open-source structure is ideally suited to developers who need specialized requirements on their navigation system.

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Description

Features
  1. Cost-efficient high precision and RTK supported GNSS chip (base station needed for RTK). Positioning accuracy down to centimetre-level in an ideal environment.

  2. Brand new design with improved visibility on signal LEDs. Better dust and water resistance (Not guaranteed to be water-proof under any situation due to the complexity of the operating environment).

  3. The high data rate, upgradeability, noise immunity, and real-time features benefited from CAN protocol

  4. Equipped with STM32F302 high-performance processor in a real-time operating system. The framework developed by Hex provides additional stabilities. Supports future firmware updates.

  5. Support from ground control software. Future updates will be available from Mission Planner.

  6. Built-in a complete set of Inertial Measurement Unit (compass, gyroscope, and accelerometer), which satisfy advanced navigation needs.

          

Specification

Receiver Type

u-blox M8 high precision GNSS modules (M8P)

Satellite Constellation

GPS L1C/A, GLONASS L1OF, BeiDou B1I

Positioning accuracy

3D FIX: 2.5 m / RTK: 0.025 m

Processor

STM32F302

IMU sensor

ICM20948

Navigation Update Rate

Max: 8Hz

Communication Protocol

CAN

Operating Temperature

-40℃ to 85℃

Dimension

68mm x 68mm x 16mm

Weight

48.8g

Pinout

Pin

Definition

Cable Colour

1

VCC_5V

Red

2

CAN_H

White

3

CAN_L

Yellow

4

GND

Black

Configuration
1. Using Ardupilot Firmware:

Using one Here3:

Connect the 4pin CAN cable connector to CAN1 or CAN2 port on the flight controller.

power the flight controller and connect it to Mission Planner. Go to “Config/Tuning > Full Parameter List” and modify the following parameters:

CAN_D1_PROTOCOL: 1

CAN_D2_PROTOCOL: 1

CAN_P1_DRIVER: 1

CAN_P2_DRIVER: 1

GPS_TYPE: 9

NTF_LED_TYPES: 231

Click “Write Params” when done. CAN functions will be available after rebooting the flight controller.

Using two Here3:

You need the latest Ardupilot firmware to manually assign different node ids to Here3 to work properly (node ids are 0-125).

Connect each Here3 4Pin CAN cable to the CAN1 port of the flight controller(one at a time), and conduct the following procedure. Select “install firmware” from Mission Planner and load the latest copter and plane firmware.

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