Aotenjo Master v2.3

Introducing the Aotenjo Master v2.3 BLDC Control Hub: Your Central Command for Multi-Motor Automation

Take command of complex multi-motor systems with the Aotenjo Master v2.3, the ideal central control unit for your automation projects. Designed to bridge your PC with an entire network of motor controllers such as the Aotenjo One, the Master enables you to control multiple BLDC motors over a high-speed CAN FD bus, all through a single USB connection.

Version 2.3 introduces switchable CAN termination and dual CAN and power connectors, making the Master more flexible to position anywhere along your CAN network—not just at the end of the bus.

Built for flexibility and performance, the Aotenjo Master provides the processing power and diverse connectivity needed to manage intricate motion profiles and integrate additional sensors and peripherals.

Firmware | Tutorials

Key Features:

• Centralized Motor Control: Manage and send commands to multiple individual motor control boards, such as Aotenjo One units, across a CAN FD bus for fast and reliable communication.
• Switchable CAN Termination: An onboard CAN termination SPDT switch allows you to manually enable or disable bus termination. Enable termination when the Master is located at the end of the CAN network, or disable it when the Master is positioned in the middle of the bus.
• Flexible CAN Network Placement: Unlike previous versions, which were designed primarily to operate at the end of the CAN network, v2.3 can be conveniently placed at either end or in the middle of the CAN bus.
• Dual CAN & Power Connectors: Two JST PH CAN connectors and two JST XH power connectors make it easy to continue the CAN bus and power wiring through the Master, simplifying daisy-chained and multi-controller installations.
• PC Connectivity & Command: Connect directly to your PC via USB Type-C to send motor commands and data and receive feedback.
• Powerful Microcontroller: Driven by the STM32G431CB (170 MHz, 128 KB Flash, 32 KB RAM), providing ample processing capability for motion control and automation applications.
• Extensive Peripheral Support: Integrate sensors and other components using 2x SPI, 2x I2C, and 2x UART interfaces.
• VSENSE Voltage Monitoring: Monitor onboard VCC voltage in real time using the STM32G431's ADC, enabling power monitoring and diagnostics.
• Intuitive User Feedback: Equipped with multiple user-configurable LEDs (Blue, Green, Red, and Yellow), dedicated user buttons, and a power indicator LED.
• Simplified Power Distribution: Two JST XH connectors allow power to be routed through the Master to downstream motor controllers such as Aotenjo One, simplifying wiring in multi-board systems.
  

Technical Specifications:

MCU: STM32G431CBU6 (170MHz, 128KB Flash, 32KB RAM)

CAN Transceiver: TCAN3413 (3.3V operation)

Voltage Input: 8-35v (via terminal block KF301-2P for main power to Aotenjo Master)

CAN Termination: Switchable onboard termination via SPDT switch

Communication Interfaces:

• CAN: 2x JST PH connector
• USB: 1x USB Type-C port (for PC communication)
• SPI: 2x interfaces
  
• I2C: 2x interfaces
• UART: 2x interfaces

Power Distribution: 2x JST XH connectors for routing power to downstream Aotenjo One or other compatible boards

User Interface: 2x User Buttons, 1x NRST Button (can be configured as user button)

Indicators: 1x Blue LED, 1x Green LED, 1x Red LED, 1x Yellow LED, 1x Red Power Indicator LED

Mounting: 4 x M3 holes

CAN Termination & Network Placement

A CAN bus should be terminated at both physical ends of the network. Previous Aotenjo Master versions included fixed termination and were therefore intended to be installed at the end of the CAN network.

With Aotenjo Master v2.3, the onboard termination switch lets you choose whether the Master's termination resistor is connected.

• Master at the end of the CAN bus: Enable CAN termination.
• Master in the middle of the CAN bus: Disable CAN termination.

The additional CAN and power connectors allow the network wiring to continue through the Master, giving you much more freedom when arranging controllers throughout your machine.

What's Included:

• 1x Aotenjo Master v2.3 Board
  
• 1x Main Power Input Cable (10cm / 3.94 inches, 18AWG) - for connecting to a power supply
  

Important Notes:

• Proper CAN bus termination is required for reliable communication. When using the Master in the middle of the network, disable its onboard termination and ensure that termination is provided at both physical ends of the CAN bus.
• To program this board, you will need an ST-LINK V2 Clone or compatible programmer.
  

The Aotenjo Master v2.3 gives you a more flexible way to build multi-axis BLDC automation systems, with switchable CAN termination and pass-through CAN and power connections for easier network layout.