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Bluetooth Watt meter dongle user manual

Published: 16 December 2023
Last updated: 16 December 2023
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There are 5 menus. Click the button for 2 seconds to select. The leds will now flash. Example: to select menu 2, click after the second flash, the selected menu will be executed.

  1. Set the specified battery capacity in Ampere hour [Ah]. This is default set to 12Ah. See also “Set battery capacity”. To show the Ah value, see menu 2.
  2. Show the specified battery capacity in [Ah]. See also “Show values”.
  3. Set the fuel gauge temporarily to full. Don't use this, its only for testing.
  4. Set a new charge cutoff voltage. Enter this menu when the battery is fully charged. The battery voltage will be measured and stored automatically. The default value is 41V.
  5. Show the charge cutoff voltage. See also “Show values”.

1 Set the specified battery capacity

We have to set the battery capacity manually before use. The default value is 12Ah. The allowed range is from 1.0Ah to 69.0 Ah.

  • The ledbar flashes fast.
  • Enter the tens 1*)
  • The ledbar flashes fast.
  • Enter units.
  • The ledbar flashes fast.
  • Enter the decimal. You can skip the decimal by doing nothing anymore.

1*) For a zero: click the button immediately after the ledbar flashes fast. For a number n from 1-9: click after n flashes.

Example 23Ah

  • The ledbar flashes fast.
  • Count 2 led flashes and then click.
  • The ledbar flashes fast.
  • Count 3 led flashes and then click.
  • The ledbar flashes fast.
  • Click the button immediately or do nothing anymore.

Example 20Ah

  • The ledbar flashes fast.
  • Count 2 led flashes and then click.
  • The ledbar flashes fast.
  • Click the button immediately for the zero.
  • The ledbar flashes fast.
  • Click the button immediately or do nothing anymore.

Example 1.2Ah:

  • The ledbar flashes fast.
  • Click the button immediately (since tens = 0)
  • The ledbar flashes fast.
  • Count 1 led flash and then click.
  • The ledbar flashes fast.
  • Count 2 led flashes and then click.

Example 300mAh = 0.3Ah

  • The ledbar flashes fast.
  • Click the button immediately (since tens = 0)
  • The ledbar flashes fast.
  • Click the button immediately (since tens = 0)
  • The ledbar flashes fast.
  • Count 3 led flashes and then click.

If the battery capacity is set too low, the fuel gauge will display 0% while the battery is still not empty. This is shown with a blinking red led.

Show values

This works in the same way as setting the specified battery capacity but with just showing flashing leds.

Example 45Ah

  • The ledbar flashes fast.
  • The led flashes 4x.
  • The ledbar flashes fast.
  • The led flashes 5x.
  • The ledbar flashes fast.
  • No flashes since there are no decimals
  • The ledbar flashes fast.

Example 4.6Ah

  • The ledbar flashes fast.
  • No flashes since there are no tens.
  • The ledbar flashes fast.
  • The led flashes 4x.
  • The ledbar flashes fast.
  • The led flashes 6x.

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