node-red-edgepi-dac

EdgePi DAC node

EdgePi DAC node that reads/writes voltage to a given output channel.

Install

Install normally through the node-red editor or install with npm in your node-red directory
(typically located at ~/node.red) by running the following command:

``
npm install @edgepi-cloud/node-red-edgepi-digital-dac
`

$3

- RPC Server

The connection to your EdgePi's RPC Server.
- Channel

The channel for analogue output read/write.
- Gain

Enable/ disable internal DAC gain. Gain enabled allows for a larger output voltage for a given input voltage but reduces accuracy.
- Output voltage _number_

The amount of voltage to write to a selected channel. Range is 0-5 for gain off and 0-10 for gain on.

$3

- payload _number_:

The voltage to write.
- gain _boolean_:

'false' for gain disabled (off), 'true' for gain enabled (on).
- channel _number_:


Example input:

`
msg {
"payload": 2.5,
"gain": false,
"channel": 7
}
``

$3

- payload _number_

Voltage written to the selected channel.