The most common cause is an incorrect UART configuration on the VESC. Make sure that you have the following set up in the VESC Tool:

• App Settings > General > App to Use: PPM and UART
• App Settings > UART > Baudrate: 115200 bps

Another reason may be that the cable is not correctly connected. Swapping RX/TX wires is a common mistake. The wires should be connected as follows:

For exact measurement, take a string and route it from the center-point of the front truck mounting holes to your VESC UART port. Then add 10 cm to the length.

A good quick estimate for 2WD setups with a bottom mounted enclosure is to measure the distance between the deck nose and the rear of the enclosure.

I know my battery layout and the cell type

Look up the capacity for the cell and multiply by the number of cells in each parallel group (the P value).

For example, your battery is 12S5P made of Samsung 30Q cells. The Samsung 30Q capacity is 3000 mAh. The P value is 5. Thus, the total battery capacity is 5 x 3000 = 15000 mAh.

I know my battery layout and the total capacity in Wh

Divide the total capacity by the number of series (the S value) to get the Wh capacity per parallel group. Divide by 3.6 (nominal cell voltage) to get the capacity in Ah. Multiply by 1000 in order to convert to mAh.

For example, your battery is 12S6P with the total capacity of 1036.8 Wh. The capacity per parallel group is 1036.8 / 12 = 86.4 Wh. This is 86.4 / 3.6 = 24 Ah or 24000 mAh.

For new batteries, the usable capacity is typically around 80% (this is the default value in the DAVEGA settings).

As your battery deteriorates, you may want to lower the usable capacity in order to keep the projected range calculations accurate. As a rule of thumb, if your projected range is unexpectedly high, set the usable capacity lower and vice versa. First, check that all your battery settings are correct though.

We don't guarantee the pre-assembled DAVEGA X to be waterproof, though it should withstand minor rain.

If you want to ride in bad weather conditions, we strongly recommend that you take appropriate measures. First, you will want to double-check that the housing is well sealed. It should be but we don't have the capacity for testing each piece. In particular, make sure there's no leak around the protective glass.

A gasket between the housing and the baseplate is recommended.

Conformal coating on the electronics will add extra protection. Unless you happen to live in Hong Kong, you may not need to take it to extremes like Luke, though you can. :)