ESP32 DevKit V1

ESP32 DevKit V1 hardware compatible with Battery-Emulator~

MCU / flash: ESP32-D0WDQ6 (Xtensa LX6 dual-core, 240 MHz), 4 MB flash, no PSRAM.

NOTE

The Devkit is for advanced users that are OK with troubleshooting wiring and complex software setups. For easy use of Battery-Emulator, consider using a ready-made board.

The ESP32 DevKit V1 hardware can be used with Battery-Emulator, and has the following features:

25 configurable GPIO pins, allowing the following features simultaneously:
- 2x CAN
- 1x CANFD (or 2 BMW I3 wakeup pins)
- Emergency Stop Button
- Inverter enable connection
- Inverter allows contactor closing LED
- 3x contactor pins for negative, pre-charge and positive contactors

GPIO	Function
0	BOOT button — long-press options available
1	RS485 TX (UART0, shared with the USB serial console)
2	SMA inverter "contactor allowed" indicator LED output
3	RS485 RX (UART0, shared with the USB serial console)
4	Status LED (addressable) — or HIA4V1 precharge control output when automatic precharging is used
5	Positive contactor output — or inverter disconnect contactor output when automatic precharging is used
12	Equipment stop input
14	SMA inverter contactor enable input
16	Negative contactor output
17	Precharge contactor output
18	MCP2515 CAN add-on: CS
19	MCP2515 CAN add-on: MISO (SDO)
21	MCP2515 CAN add-on: MOSI (SDI)
22	MCP2515 CAN add-on: SCK
23	MCP2515 CAN add-on: INT
25	MCP2518FD CAN FD add-on: CS — or battery wake-up 1 (WUP1)
26	Native CAN RX
27	Native CAN TX
32	MCP2518FD CAN FD add-on: SDI — or second battery contactors output — or battery wake-up 2 (WUP2)
33	MCP2518FD CAN FD add-on: SCK
34	MCP2518FD CAN FD add-on: INT
35	MCP2518FD CAN FD add-on: SDO

NOTE

The MCP2515/MCP2517 pins are defined in the HAL, but available_interfaces() for this board offers only Modbus, RS485 and native CAN, so the add-on interfaces cannot currently be selected in the UI.

Overview of features~

Power~

Power via USB
Supply voltage (+6.5VDC - +16VDC), if used with ESP32 DevKit V1 breakout board.

WARNING

USB connection and simultaneous external power are not be compatible. Ensure to disconnect the external power before connecting USB.

Communication~

1 x CAN channel using Texas Instruments SN65HVD230 breakout board
1 x CAN-FD channel using Microchip Technology MCP2518FD breakout board
1 x RS485 using Analog Devices MAX13487E breakout board

Status LEDs~

1 x logic power indicator (Red)
1 x output status indicator (Blue: GPIO 2), used to indicate if the inverter allows contactor closing.

Headers~

2 x 15 pins

Physical control / Interaction~

1 x micro USB OR USB-C power and data connector
1 x BOOT button
1 x EN button

Hardware connections~

The pins to be used for the different breakout boards are defined in hw_devkit.h

Where can I get one?~

Google ESP32 DevKit V1 and you should be able to find plenty of resellers.

Google ESP32 DevKit breakout board, to also buy the breakout board. The DevKit and breakout board can sometimes also be purchased as a set.