Shenzhen Big Tree Technology Co., Ltd.

BIGTREETECH

BIGTREETECH
MANTA E3EZ V1.0
User Manual

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Contents
Revision History ...............................................................4

Product Profile ................................................................5

Feature Highlights .........................................................5

Specifications .............................................................6

Dimensions ...............................................................8

Peripheral Port ................................................................9

Connector Diagram ........................................................9

Pinout Diagram............................................................9

Connection Description ........................................................10

USB Power Supply ........................................................10

Motor Voltage Selection ....................................................11

Select Motherboard Supply Voltage ......................................11

Select Motor Supply Voltage ............................................11

Stepper Motor Driver ......................................................11

UART/SPI Mode of EZ Driver ..........................................11

EZ Driver DIAG (Sensorless Homing) ....................................11

Install the Core Board via BTB Connection ...................................12

USB or UART Mode .......................................................13

BLTouch Wiring ..........................................................13

Auto Power Off (Relay V1.2) Wiring .........................................14

Power Loss Recovery (UPS 24V V1.0) Wiring ..................................14

RGB Wiring .............................................................15

Filament Sensor Wiring ....................................................15

LCD Screen Wiring .......................................................16

40 Pins GPIO ............................................................17

DSI, CSI Wiring ..........................................................18

ADXL345 accelerometer ...................................................18

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EZ31865 Wiring ..........................................................19

Raspberry Pi CM4 Usage Instructions ............................................20

Download OS Image .......................................................20

Download and Install Raspberry Pi Imager ...................................20

Write OS ................................................................21

CM4 LITE Version (MicroSD Card) .....................................21

CM4 eMMC Version ..................................................24

System Setting (CM4)......................................................25

USB 2.0 Hub .........................................................25

DSI1 Display .........................................................25

CSI1 Camera.........................................................25

BIGTREETECH CB1 Usage ....................................................26

Download OS Image .......................................................26

Download and Install balenaEtcher ..........................................26

Write OS ................................................................26

WiFi Setting .............................................................28

Configure the Motherboard ....................................................29

SSH Connect to Device .....................................................29

Compile MCU Firmware ...................................................30

Firmware Update .........................................................31

Update Using SD Card .................................................31

Update via DFU ......................................................31

Configure Klipper ........................................................33

Cautions.....................................................................34

FAQ ........................................................................34

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Revision History
Version Revisions Date
01.00 Original 2023/01/12
01.01 Add the description of screw hole size of fixed core 2023/01/30
board
01.02 Change Pin Diagram - CAN Signal IO Port 2023/6/29

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Product Profile
BIGTREETECH MANTA E3EZ V1.0 is a 32-bit motherboard developed by the 3D
printing team of Shenzhen Big Tree Technology Co., Ltd. for Ender-3, Klipper running,
and EZ series drivers. It is compatible with Ender-3 motherboard mounting holes. Simply
plug in the core board, and your Ender-3 will be able to run Klipper, greatly eliminating
the mass wiring between the motherboard and Raspberry Pi, and also greatly saving space
in the chassis. The BTB headers are designed on MANTA E3EZ V1.0, so that customers
can choose to use CM4 or other solutions, thus solving the insane shortage of Raspberry
Pi CM4.
Note: With the Manta E3EZ board, we packed it with so many features and connectivity
options that we needed to use M2 standoffs instead of M2.5 beneath the CB1 due to the
track density.

Feature Highlights
1. 32bit 64MHz ARM Cortex-M0+ series STM32G0B1RE MCU.
2. TPS5450-5A power supply chip supports DC12/24V power input, current output
rated at 5A max continuous and 6A max instantaneous, sufficient power supply for
Raspberry Pi.
3. The thermistor circuit is protected to prevent MCU damage from shorted heated bed
and heater cartridge connections.
4. MCU firmware can be upgraded via SD card, or use DFU via Klipper's make flash
command.
5. BTB connectors are adopted between the motherboard and core board, allowing the
choice of other core board solutions in addition to CM4.
6. Onboard SPI and UART mode of EZ driver, which can be used directly without a
jumper.
7. Onboard DIAG pin, easily configurable with jumpers.
8. Support power loss recovery, filament runout sensor, auto power-off, BLTouch, RGB,
etc.
9. High-efficiency MOSFET for less heat generation.
10. Replaceable fuse for easy maintenance.
11. Onboard SPI interface for connecting acceleration sensor to enable Klipper's input
shaping.
12. The temperature sensor interface adopts a high-precision pull-up resistor.

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13. Each motor driver module can select the corresponding motor voltage by jumper
caps.
14. The motor power supply supports up to 56V, and for the larger voltage when using
EZ5160, an isolation chip is used to protect the main control from burning IO.

Specifications
90.8x120mm,
Dimensions for details please refer to BIGTREETECH Manta E3EZ
V1.0-SIZE.pdf
Please refer to BIGTREETECH Manta E3EZ V1.0-
Mounting Size
SIZE.pdf
MCU ARM Cortex-M0+ STM32G0B1RE 64MHz

Motherboard Power
DC12V-DC24V
Supply Voltage

Motor Power Supply

DC12V-DC56V
Voltage
Logic Voltage DC 3.3V

Heater Connection Heated Bed (HB), Heater Cartridge (HE0, HE1)

HB Port Max Current 10A Continuous, 11A Instantaneous

Heater Cartridge Max

5A Continuous, 6A Instantaneous
Current

Fan Port 3 x CNC, 2 x Always On

Fan Port Max Current 1A Continuous, 1.5A Instantaneous

Overall Max
Current(Heater
＜10A
Cartridge+Driver+All
Fans)

BLTouch, PS-ON, PWR-DET, Fil-DET, RGB,

Expansion Port
CAN FD, SPI

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Support EZ5160, EZ2209, EZ2208, EZ2225, EZ2226,

Motor Driver
EZ2130, EZ6609...

Driver Mode SPI, UART

Motor Socket X, Y, Z (Dual Z Axes), E0, E1, 5 Channels in Total
Thermistor 3 x 100K NTC
Display SPI Touchscreen, LCD Display

PC Connection Micro-USB

USB 2.0x2, LAN, DSI, CSI, SPI, 40 Pins GPIO, HDMI0,

Functional Ports
SOC-Card, MCU-Card

Supported File Format G-code

Supported Kinematics Cartesian, Delta, Kossel, Ultimaker, CoreXY

Recommended
Cura, Simplify3D, Pronterface, Repetier-host, Makerware
Slicer/Console

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Dimensions

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Peripheral Port
Connector Diagram

Pinout Diagram

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Connection Description
USB Power Supply
After the BIGTREETECH MANTA E3EZ V1.0 has been powered, the Red light 3V3 will
light up, indicating power on. When using only USB to power the board, please insert the
jumper cap onto the VUSB.

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Motor Voltage Selection

Select Motherboard Supply Voltage

Select Motor Supply Voltage

Stepper Motor Driver

UART/SPI Mode of EZ Driver
Onboard SPI and UART mode of EZ driver, which can be used directly without the need
for a jumper.
EZ series drivers support the use of both UART and SPI drivers at the same time.
EZ Driver DIAG (Sensorless Homing)
When using sensorless homing, place jumpers according to the diagram below.
DIAG and limit switches cannot be used at the same time because there will be a level
conflict.

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Install the Core Board via BTB Connection

E3EZ+CM4: Pay attention to the direction, as shown in the figure below:

E3EZ+CB1: Pay attention to the direction, as shown in the figure below:

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USB or UART Mode

As shown in the figure below, the left side of the DPDT switch is connected to the USB-
OTG of the core board, which is used to write the OS image of eMMC version core
board.
the right side of the DPDT switch is connected to the CH340 (USB to UART) onboard
and then connect to the UART of core board, which is used for the computer to debug the
core board directly.

BLTouch Wiring

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Auto Power Off (Relay V1.2) Wiring

Power Loss Recovery (UPS 24V V1.0) Wiring

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RGB Wiring

Filament Sensor Wiring

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LCD Screen Wiring

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40 Pins GPIO

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DSI, CSI Wiring

ADXL345 accelerometer
Refer to here: https://www.klipper3d.org/Measuring_Resonances.html, We can refer to
the following wiring and configuration when connecting to the motherboard

[adxl345]
cs_pin: PC15
spi_bus: spi3a
#spi_software_sclk_pin: PC10
#spi_software_mosi_pin: PC12
#spi_software_miso_pin: PC11

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EZ31865 Wiring
1 2 3 4 Type
ON ON ON OFF 2-Wire PT100
ON ON OFF ON 2-Wire PT1000
OFF ON ON OFF 3-Wire PT100
OFF ON OFF ON 3-Wire PT1000
OFF OFF ON OFF 4-Wire PT100
OFF OFF OFF ON 4-Wire PT1000
The 2/4 line is shown in the left figure. If the 3 line is used, it needs to be changed to the
right figure (the factory default is 2/4 line)

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Raspberry Pi CM4 Usage Instructions

Download OS Image
When using CM4, download the image of Fluidd, Mainsail directly, also, you can
download a pure OS image from the Raspberry Pi official website and install it yourself.
Fluidd: https://github.com/fluidd-core/FluiddPI/releases
Mainsail: https://github.com/mainsail-crew/MainsailOS/releases
Official Raspberry Pi OS Image: https://www.raspberrypi.com/software/operating-
systems
(The usage of CM4 is slightly different from the Raspberry Pi 3B, 4B, etc., CM4 needs to
refer to the system settings section to enable the system's USB, DSI, and other interfaces).

Download and Install Raspberry Pi Imager

Install the official Raspberry Pi Imager: https://www.raspberrypi.com/software/

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Write OS
CM4 LITE Version (MicroSD Card)
1. Insert MicroSD into your computer via a card reader.
2. Choose OS.

3. Select "Use custom", then select the image that you downloaded.

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4. Click the settings icon in the lower right corner.

5. "Enable SSH" and then click "Save", there are other functions that can be set in this
interface, please modify them according to your needs. Details are as follows:
Set hostname: raspberrypi.local // custom hostname, default is raspberrypi.local
Enable SSH
Set username and password // custom username and password, default username: pi,
password: raspberry
Configure wireless LAN // custom WiFi name and password

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6. Select the MicroSD card and click "WRITE" (WRITE the image will format the
MicroSD card. Be careful not to select the wrong storage device, otherwise the data
will be formatted).

7. Wait for the writing to finish.

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CM4 eMMC Version

Note: the eMMC version will not run the system from the MicroSD card.
1. Install rpiboot
For Windows:
http://github.com/raspberrypi/usbboot/raw/master/win32/rpiboot_setup.exe
For Mac and Linux:
https://github.com/raspberrypi/usbboot#building
2. Plug jumpers on 4 (USBOTG), 3 (RPIBOOT) to enter BOOT mode. And turn the
DPDT switch to the left to connect the MicroUSB to the USB-OTG of the core board

3. Plug the Micro USB into the USB port of the computer (in order to avoid problems
caused by the insufficient USB power supply of the computer, it is recommended to
use an external 24V power supply to power the motherboard), run sudo ./rpiboot
(Mac/Linux) or rpiboot.exe on Windows, then the eMMC of CM4 will be recognized
by the computer as a mass storage device (if rpiboot reports an error at this time, you
can try to re-plug the USB).
4. The steps of using the Raspberry Pi Imager to write the OS image are the same as the
LITE version.
5. When the writing is complete, remove the jumpers from 4 (USBOTG) and 3
(RPIBOOT), and then enter the normal working mode after powering on again.
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System Setting (CM4)

USB 2.0 Hub
E3EZ is equipped with a USB 2.0 Hub. In order to save power consumption, the USB
port of CM4 is disabled by default. If you need to enable it, you need to add the following
content in the config.txt file:
dtoverlay=dwc2,dr_mode=host

DSI1 Display
The default display interface is HDMI, and the DSI interface of E3EZ is DSI1, you need
to download the DSI1 driver, and enter the following in the command line:
sudo wget https://datasheets.raspberrypi.com/cmio/dt-blob-disp1-cam1.bin -O /boot/dt-
blob.bin
After downloading this driver and restarting, the screen connected to the DSI interface can
be displayed normally. If you want to use the HDMI interface, you need to delete the
downloaded /boot/dt-blob.bin driver and restart, and then the HDMI can output normally.

CSI1 Camera
The DSI1 driver downloaded in DSI1 Display also includes the
CSI1 driver. If you just want to install the CSI1 driver, not DSI1, please find the driver
you want to use at https://datasheets.raspberrypi.com/licence.html and
download it in the boot folder of CM4 and rename it to dt-blob.bin, then refer
to the settings here:
https://projects.raspberrypi.org/en/projects/getting-started-with-picamera/

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BIGTREETECH CB1 Usage

Download OS Image
When using CB1, you can only download and install the OS image provided by
BIGTREETECH.
https://github.com/bigtreetech/CB1/releases

Download and Install balenaEtcher

BalenaEtcher: https://www.balena.io/etcher/

Write OS
1. Insert a MicroSD card into your computer via a card reader.
2. Select the image that you downloaded.

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3. Select the MicroSD card and click "WRITE" (WRITE the image will format the
MicroSD card. Be careful not to select the wrong storage device, otherwise the data
will be formatted).

4. Wait for the writing to finish.

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WiFi Setting
Note: This step can be skipped if you are using a network cable connection.
After the OS image writing is completed, the MicroSD card will have a FAT32 recognized
by the computer, find "system.cfg".

Open it with Notepad, replace WIFI-SSID with your WiFi name, and
PASSWORD with your password.

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Configure the Motherboard

SSH Connect to Device
1. Install the SSH application Mobaxterm: https://mobaxterm.mobatek.net/download-
home-edition.html
2. Insert MicroSD card to E3EZ, and wait for the system to load after power on, approx.
1-2min.
3. The device will automatically be assigned an IP address after successfully connecting
to the network.
4. Find the device IP address on your router page.

5. Or use the https://angryip.org/ tool, scan all IP addresses in the current network
organize by names, and find the IP named Fluidd, Mainsail (CM4), or BTT-CB1,
Hurakan (CB1), as shown below.

6. Open Mobaxterm and click "Session", and click "SSH", inset the device IP into
Remote host, and click "OK" (Note: your computer and the device needs to be under
the same network).

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7. Login:
CM4:
Login as: pi
Password: raspberry
CB1:
Login as: biqu
Password: biqu

Compile MCU Firmware

1. After SSH is successfully connected to the device, enter in the terminal:
cd ~/klipper/
make menuconfig
Compile the firmware with the following configuration (if the options below are not
available, please update your Klipper source code to the newest version).
* [*] Enable extra low-level configuration options
* Micro-controller Architecture (STMicroelectronics STM32) --->
* Processor model (STM32G0B1) --->
* Bootloader offset (8KiB bootloader) --->
* Clock Reference (8 MHz crystal) --->
* Communication interface (USB (on PA11/PA12)) --->

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2. Press 'q' to exit, and "Yes" when asked to save the configuration.
3. Run make to compile firmware, 'klipper.bin' file will be generated in the
home/pi/klipper/out folder when make is finished, download it onto your computer
using the SSH application.

Firmware Update
Update Using SD Card
1. Rename klipper.bin to "firmware.bin", copy it to the root directory of the SD card,
insert the SD card into the SD card slot of the E3EZ, click the reset button, or power
on again, the firmware will be updated automatically, after the update is complete,
"firmware.bin" in the SD card will be renamed to "FIRMWARE.CUR".
2. Enter ls /dev/serial/by-id/ in the command line to check the motherboard ID to
confirm whether the firmware is updated successfully as shown below.

copy and save this ID, it is needed when configuring the file.
Update via DFU
If ls /dev/serial/by-id/ can find the klipper device ID of the MCU, you can enter make
flash FLASH_DEVICE= /dev/serial/by-id/usb-
Klipper_stm32g0b1xx_190028000D50415833323520-if00
directly to write the firmware. (Note: replace /dev/serial/by-id/xxx with the actual ID
queried in the previous step.)

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After the writing is completed, there will be an error message: dfu-util: Error during
download get_status, just ignore it.

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Configure Klipper
1. Enter your device IP address into your browser, and find the reference config for the
motherboard in the directory shown below, if there is no such config available, update
your Klipper source code to the newest version or download it from GitHub:
https://github.com/bigtreetech/Manta-E3EZ

2. Upload your finished config file into Configuration Files, and rename it to
"printer.cfg".

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3. Enter the correct ID.

Follow the instructions https://www.klipper3d.org/Overview.html to configure the

specific functions of the machine.

Cautions
1. Maximum heated bed current is 10A, if high power heated bed is preferred, please
use 24V to power the system and use a 24V heated bed.
2. Except for HDMI, USB, and RJ45, unplugging and plugging operations should be
performed under the condition of power off, including the eMMC writing function.
3. Pay attention to the heat dissipation of CB1/CM4. If the running application
consumes too many system resources, CB1/CM4 will get hot quite seriously.
4. The MicroSD card slot is not spring loaded, please be careful when inserting the
MicroSD card to prevent damage to the card slot. BTT is not responsible for any
damage caused by forcefully inserting the MicroSD card.

FAQ
Q: Max current of heated bed, heater cartridge, fan port?
A: Heated Bed: 10A Continuous, 11A Instantaneous
Heater Cartridge: 5.5A Continuous, 6A Instantaneous
Fan Port: 1A Continuous, 1.5A Instantaneous
The combined current of heater cartridge, driver and fan port should not exceed 10A.
Q: Cannot update firmware with SD card
A: Make sure your SD card is formatted to FAT32, firmware file name is "firmware.bin",
make sure your system is showing file suffix, if suffix is hidden, "firmware.bin" will be
shown as "firmware".

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