Wiring up

Explore hardware setup examples for a variety of use cases.

Otii hardware features two main connectors and one expansion port. Multiple channels can be measured with the available inputs, such as main current, main power, main voltage, ADC current, ADC voltage, SENSE+ voltage, SENSE- voltage, GPI1, and GPI2, as well as capturing serial logs from any embedded system or IoT devices.

To get the most out of the Otii Arc Pro and Otii Ace Pro, start by checking out the Expansion port to explore how to enhance measurement capabilities.

Expansion Port

Wiring up possibilities

Discover hardware setup examples for a variety of use cases:

Keep in mind

Selecting a power supply

When using an external DC adapter, choosing one from an established supplier is highly recommended. The adapter should be low-noise, comply with IEC 60950-1 as a Limited Power Source, and have an output of 7 to 9 VDC for the Otii Arc Pro and 7 to 20 VDC for the Otii Ace Pro, with a maximum of 5A.

Visit the FAQ page for more information on selecting the proper power supply.

Grounding advice

A separate ground wire for the signal ground, attached to either DGND (Digital Ground) or AGND (Analog Ground) on the expansion port, should be used. This will prevent disturbances and measurement errors caused by voltage drops in the negative battery wire.

  • AGND is utilized as a reference point for analog measurements.

  • DGND is used as a reference point for digital signaling.

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