ESP32 Development Board Kit

Last updated: August 25, 2024
Known Issues - Solutions:

Fuse easily blows and does not reset - Shorting the fuse pads
during the first programming session does not automatically enter download mode - Manually press boot to enter download mode. HXC Development Board Type A


Design Concept:
Although the DJI Type A development board boasts powerful performance and has been validated in competitions for many years, its high price, difficulty in repair, high learning curve, and long development cycle have always troubled us.
Therefore, we designed this development board using the ESP32 S3 as the main controller and utilizing as many low-cost and common components as possible, keeping the cost below 50 yuan while achieving 80% of the functionality.

One CAN channel (with transceiver chip),
maximum 26V power input (can be powered by TB48S battery),
maximum 5V 3A step-down output,
seven GH1.25-4P customizable interface types (configurable as UART, I2C, etc.)
, ten GPIO pin headers for direct-plugging servos,
two programmable LEDs,
one SBUS/DBUS interface (receiver interface),
six XT30/CAN motor interfaces
, 5V and 3.3V motor interfaces with fuses and TVS protection.
All components are located on the front for easy soldering.
Hole positions and dimensions are completely consistent with DJI development board A type. Sample programs and code repositories:
All code is based on ESP32ArduinoSDK. Most libraries are developed in C++, and most modules are encapsulated in a single .hpp file for easy calling.
We use the vscode + platformio environment for development. If you prefer, you can also use the Arduino IDE or ESP-IDF. Simply copy the .hpp file of the required module to the project directory.
See the README file in the repository for details.
Click to enter the GitHub code repository .


Currently, our hardware libraries include:
DJI 3508, 2006 motor,
Zhang Datou closed-loop stepper control,
Huaner Bus servo,
OPS-9 odometer,
SBUS/DBUS.
Only 4 lines of code are needed to control M3508, M2006, GM6020.
Hardware Overview:
Peripherals:
4*SPI,
3*UART (USB can be simulated additionally)
, 2*I2C
, 2*I2S
, 8*PWM,
20*ADC.
All peripherals can be mapped to any available pin.
Power Supply:
VCC is stepped down to 5V via TPS5430. 5V is stepped down to 3.3V via AMS1117.
CAN:
Because the ESP32 has a built-in CAN controller, we only added an external TJA1050 CAN transceiver chip.
Download Circuit:
ESP32 The S3 has a built-in USB interface, so no additional download circuit is needed. This USB port can be configured as a serial port and for JTAG use.
Note that
during the first download, you need to press BOOT before inserting the USB to enter download mode.
After the program is downloaded, sometimes you need to restart the microcontroller for it to work properly (press EN).
The SBUS/DBUS
standard level inversion circuit uses the common S8050 transistor
test points ,
bringing out the test points for most pins, facilitating jumper wires, multimeter troubleshooting, and repair.
The HXC development board D-type
C3 minimum module has CAN transceiver and can be used as a main controller, CAN monitoring terminal, ESPnow receiver, etc., for functions such as
motor online detection ,
web-based online testing, and PID functionality. Once developed, it will be open-sourced.
The large power divider board
doesn't need much introduction;
the small power divider board
is very compact.
The CAN transceiver module
can be used with ordinary ESP32.