Adapter V2 manual

//update: 05/12/2022

editing, will be finished soon, sorry!

Buy link: https://spintend.com/products/ewheel-adc-adapter-v2-for-diy-ebike-escooter

The V2 adapter is designed to make convenient for users to connect wires of e-bike/e-scooters to the VESC. Combine with Ubox V2 or Ubox single, We can easily to build an e-bike/e-scooter.

Size: 63 x 53 x 12.5 mm

This manual is based on Ubox V2 dual, for the other VESCs, the conceptions are the same.

Features

1. Horn, head light, turn light, brake & rear light, and reverse light support.
2. High, middle, low, 3 level throttle support.
3. Motor reverse and cruise support.
4. Buzzer to prompt turn, reverse and settings.
5. Support both hall brake and mechanical brake input.
6. Support centered (two way) throttle.
7. Two/one wheel drive support.
8. Power limit mode for compliant to the local regulations.
9. Convert 5V throttle and analog brake input signal to 3.3V range, no harm to VESC.

Wiring

• Mechanical brake, light, horn, reverse and cruise are actually switches, we don't need to distinguish the two wires of each switch.
• The turn left/right switch and throttle level switch, they usually has three wires, the neutral wire is the one which can be switched on/off to other wires, so if you are not sure the wire orders, use a multimeter to test them to find the neutral wire first, then know what the rest two wires are.
• Usually, hand bar throttle or thumb throttle have three wires: black, red, green, corresponding to GND, 5V, throttle output.
• Users can also use these type of throttles to make ADC(analog) brake, in Adapter V2, the ADC brake signal is transferred to VESC's ADC2 pin.
• The second VESC ADC PORT is for two wheel drive config, if you have one wheel drive only, connect MAIN PORT to VESC.
• Adapter need a 5V and 12V power source, the 5V is get from VESC ADC port, users need to connect a 12V power source to adapter's 12V socket, for Ubox V2 connect to its FAN socket.
• The rear and brake light, usually comes with three wires in common ground connection mode, the two lights share one GND. Connect the positive(anode) wire of rear light to 12V, and brake light's to Brake light+, and their negative(cathode) wire to GND.
• The other lights and horn are low side switched, so connect the positive(anode) wire to the '12V' pin, and the negative(cathode) wire to the pin with a '-' suffix.
• For Ubox single 75V, the extra NRF port is not available, or for the other VESCs with out NRF port (some vendor referred as second UART), if the cruise and reverse functions are not needed, the TX and RX pin from the 8 pin port can connect to VESC Bluetooth by pick out the wires from the cable. We are designing a bridge PCB to separate the UART from the 8 pin cable, will be soon.

The throttle, brake, their switch and potentiometers

Some ebike/escooters have 3 level throttles, VESC does not support 3 level.

Most throttle working on 5V, and output voltage up to 4.2V, VESC can only accept ADC input within 3.3V (3.44V for some haed ware version).

VESC supports analog brake (variable/propotional) input to its ADC2, common ebike/escooter only provide a electronic switch attached to mechanical brake.

The adapter V2 do these translating jobs, makes VESC a full funtional ebike/scooter controller.

The adapter V2 divide the 5V range throttle, remap it to 3 levels, send to VESC ADC1; Simulate an analog brake voltage to the VESC ADC2 when the mechanical brake switch is triggled; Cowork analog brake input with mechanical brake. This dividing, remapping, and simulating can be adjust to require your demands with these switch and potentiometers:

The potentiometers are increase clockwise and decrease counterclockwise.

Throttle and brake power supply

If your throttle can only accept 3.3V supply, set the ‘HALL VDD’ switch to '3.3V' side. Otherwise set it to '5V'. The ADC brake port shares this supply too.

Throttle potentiometers

Adapter V2 supports three level throttles, the High level is equal to the throttle handle in put. The middle and low level are remaped from throttle handle input according to the 'THR M' and 'THR L' potentiometer's positions. The reamap range is from 0 to 100%.

If you are not connect a three level throttle switch to adapter, in case you don't have it or don't need it, the default throttle level is middle, so adjust the 'THR M' potentiometer to its maximum postion (clockwise), let the adapter not shrink the orginal throttle to the VESC.

Brake potentiometer

Mechanical brake have a electionic switch, to tell ESC to stop driving, some ESC can then do regenrative braking.

When trigger the mechanical brake switch, adapter V2 will assist it with regenerative brake automatically, the regenerative brake strength is according to the 'BRK' potentiometer, from 0 to 100%.

Mode configuring

Adapter V2 has 3 mode configurations: two/one wheel drive mode switching, power limit mode on/off, and one way/ two way throttle switching.

Two/one wheel drive mode switching

Hold both the right and left brake handles then power on the system, the adapter will toggle the 2/1 drive mode, after the switching, the buzzer will ring once for one wheel mode, and twice for two wheel mode. Release both left and right brake.

The principle of 2 wheel drive is to copy the control signal from main ESC to the second ESC. In order to implement this function, the CAN bus connection of two ESCS need to set off, for Ubox dual, it has a internal CAN bus connection, please refer: The power button of Ubox#The click button configuration.

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Power limit mode

When power on, the buzzer will ring to prompt the power limit mode state:

Ring one time ---- Limited mode.

Ring three times ---- Unlimited mode.

To change mode:

Hold both the left brake handle and the throttle handle bar, then power on the system, the adapter will switch the power limited/unlimited mode, after the switching, the buzzer will ring three times to indicate the mode change, release the throttle and left brake immediately.

If not release them in time, the adapter will proceed to next setting: Two/one way throttle switching.

The principle of Power limit mode is to scale the throttle handle bar's input to the L level, ignores the H, M, L state. So set the L level to meet your local regulations.

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Two/one way throttle switching

Two way throttle is being referred as 'center' throttle in VESC tool, it return to its center position when idle.

To change mode:

Hold both the left brake handle and the throttle handle bar, then power on the system, wait the buzzer ring three times, then still hold throttle and left brake 3 more seconds, until the buzzer again to ring 6 times, release the throttle and left brake.

The setting entry is shared with power limit mode switching, so we need to wait the power limit mode setting being time out.

The difference between two/one way mode is, in one way mode, the throttle output to ESC is as same as throttle input, in two way mode, if the brake not triggered, throttle output to ESC is as same as throttle input; If the brake handle is triggered, it will replace the throttle output with the brake signal from the brake input.

Setup in VESC tool

Before setup control logic to the VESC, we need to setup motor's FOC first. The following contents are based on VESC tool 3.01 PC edition.

Since the input setup wizard of VESC tool 3.01 (FW 5.3) is easy to fail, so we will set them in manual mode instead.

For two wheel drive mode, the principle is set ADC input on main ESC (this guide will assign it to ESCA), then let the control signal relied to ESCB by CAN bus.

For two/onw wheel drive switchable configuration, the principle is to turn off CAN bus connection, let the adapter to send the control single to the two ESCs separately.

For two way throttle, we need to change the control mode in VESC to 'center' mode, we adopt the 'Current No Reverse Brake Center' mode in this guide. We also can do two/one wheel drive mode for two way throttle.

For one way throttle, we adopt the 'Current Reverse ADC2 Brake Button' mode.

The Ubox dual has a internal 2.4G receiver, the receiver is no use in this application, we can disable receiver by click the button 9 times after the Ubox powered on and the button LED solid.

We will begin from one way throttle with two wheel drive mode. For the two/one drive switch-able mode, just disable the CAN bus connection and set the ADC control mode on the secondary ESC similar to main ESC . For the two way throttle, just set the control mode to 'Current No Reverse Brake Center'.

During the setup, the motor will spin even to full speed, keep every thing and every one away from the motor to avoid damage or injury.

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Two wheel drive only mode with one way throttle

If you want 2 wheel drive only mode, you can config the two ESC of Ubox into CAN mode, let the control signals relay through the CAN bus.

1.After Ubox power on, and button LED solid, click the button 6 times, then wait 1 second, the internal CAN bus connection is on.

2. Do the FOC setup for both ESC.

3. Set the adapter V2 to one way throttle mode, the Two/one wheel drive mode is meaningless in this configuration.

4.Plug in the ADC cable only from adapter's main socket to ESCA's socket.

5.Set you throttle handle bar's H-M-L switch to H position, if you don't have this switch, adjust the 'THR M‘ potentiometer to it max position (increase clockwise).

6. Set the brake potentiometer to max position, connect ADC (HALL or analog) brake if you have it.

7.Then use a USB cable plug into ESCA, on the VESC tool PC edition: make connection.

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8. Then go to APP Settings->General page.

Click 'Read app configuration ' on the right sidebar.

Click 'Read default app configuration ' on the right sidebar.

Set APP to Use 'ADC' mode.

Click 'Write app configuration' on the right sidebar to store current settings.

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9. Then go to APP Settings->ADC->General page.

Set the Control Type to 'Current reverse ADC2 Brake Button'.

Click 'Write app configuration' on the right sidebar to store current settings.

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10. Then go to APP Settings->ADC->Mapping page.

Click 'Stream realtime app data' on the right sidebar.

Set ADC Voltage Mapping mode to 'Current reverse ADC2 Brake Button'.

Click 'Reset min and max'.

In this step, pull the throttle and the brake handles, to let the ESC learn the throttle input signal for ADC CH1. If you don't have a throttle handle (analog brake input) for brake, trigger the mechanical brake to fulfill the ADC CH2 learning.

Click 'Apply' to accept the ADC input learning.

Click 'Write app configuration' on the right sidebar to store current settings.

Now to check if the main ESC is running follow the throttle, and the brake action.

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11.Then we will go to set the second ESC as salve.

Click the CAN device window in the left-down of the app window.

Click 'Read app configuration ' on the right sidebar.

Click 'Read default app configuration ' on the right sidebar.

Go to APP Settings->General page, set the Can Status Message Mode to ’CAN_STATUS_1_2‘.

Click 'Write app configuration' on the right sidebar to store current settings.

Now to check if the second ESC is running follow the main ESC.

Finished, to check if all the controls are working correctly.

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Two/one wheel drive switch-able

If you want a switch-able system, you need to separate two ESCS from CAN bus, let them working alone. And set each of the two ESCs one by one.

1. Set adapter to two/one wheel drive switch-able mode.
2. After Ubox power on, and button LED solid, click the button 7 times, then wait 1 second, the internal CAN bus connection is off.
3. Plug in an ADC cable from adapter's main socket to ESCA's socket.
4. Plug in another ADC cable from adapter's second socket to ESCB's socket.
5. Set you throttle handle bar's H-M-L switch to H position.
6. Then use a USB cable plug into ESCA to setup ESCA, plug the USB cable in to ESCB to setup ESCB, set them both from step 5 to step 10 as described in 'Two wheel drive only mode with one way throttle'.

When two ESCs are finished, to check if both ESCA and ESCB are working correctly, and to try to switch the two/one wheel drive mode, to check if the switching is working.

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Two way (centered) throttle

Two way throttle setting is similar to above two modes, except we need to choose the 'Current No Reverse Brake Center' mode in the APP Settings->General->General page, instead of 'Current Reverse ADC2 Brake Button'.

Before configure on VESC tool, set adapter to two way (centered) throttle mode first.

Concludes and explains

1. The reverse function is mapped on to the RX pin of VESC's ADC & UART socket. And the cruise function onto the TX pin. So we suggested to use ADC only mode instead of ADC and UART mode. This is a link to illustrate the mapping of TX RX pins: https://vesc-project.com/node/600
2. If you don't need the reverse and cruise function, you can set the 'APP to use' to 'ADC and UART'.
3. There are many ADC control mode in the VESC, the most flexible mode is Current Reverse ADC2 Brake Button, it supports cruise, reverse, and ADC brake, if you want a button brake, you can let the brake input connect to a button with the other pin of the button connected to VDD (3.3V).
4. For UBox's power button click function, please refer: The power button of Ubox.
5. On Ubox dual, the two/one wheel drive switching can also be achieved by Ubox's power button to turn on/off its internal CAN bus connection.
6. For the ignite key and voltage meter of Ubox V2, please refer: The CAN-IN and IGNITE socket of Ubox V2.

Caution and limits

1. Use a battery to power the system instead of a AC adapter power source, because AC adapter can't handle the brake current, will damage the ESC or power source. And recommend to add a fuse in to the power line to deal with accidents.
2. Since our solution is based on open source VESC, users should fully understand the risks of open source projects. This article only describes the possibility of this build method, and is not responsible for the damage and accidents caused by user themselves.
3. This product is for DIY purpose, so we only offer a very limited warranty.

FAQ

Q: What is the requirement of the lights and horn?

A: The adapter is designed for 12V power source, so they need to be 12V spec. And the total current is limited within 3A, if you are using Ubox as 12V power source.

Q: Can my Bluetooth or DAVEGA share the 8 pin UART-ADC port with adapter V2?

A: The Bluetooth and DAVEGA are using the UART port, so you can pick out the TX&RX of the UART wires from the 8pin cable to connect them, and set the ‘APP to Use’ to 'ADC and UART'.

Q: My VESC only have a 5V power source, can I use this adapter?

A: The 12V for adapter is for power the lights, and horn, the logic circuit is using the 5V, if your lights and horn can work with 5V, you can connect your 5V source into the adapter's 12V socket, they will working.

See also

Main Page