i2c-bus-fivdi

Providing a wrapper around node module i2c-bus (by Fivdi) to expose an I2CBus (from AOD) compatible interface.

Background

While AOD's I2CBus provide a more limited API compared to i2c-bus, it is also suitable for a wider range of underlining implementations (such as MCP2221 and Excamera Labs i2cDriver which are WebSerial and WebHID / NodeHID compatible implementations)

Also, I2CBus interface is defined in terms of ArrayBuffer and ArrayBufferView instead of the Node specific Buffer. This allows for more flexibility in non-node environments, the browser.

Example

Simple example to access AHT20 temperature sensor on a raspberry pi with I²C enabled on /dev/i2c-1

import { FivdiBusProvider } from '@johntalton/i2c-bus-fivdi'
import { I2CAddressedBus } from '@johntalton/and-other-delights'
import { AHT20, DEFAULT_ADDRESS } from '@johntalton/aht20'

const I2C_BUS_NUMBER = 1 // reference to /dev/i2c-1

const bus = await FivdiBusProvider.openPromisified(I2C_BUS_NUMBER)
const abus = I2CAddressedBus.from(bus, DEFAULT_ADDRESS)
const device = AHT20.from(abus)

const { temperatureC } = await device.getMeasurement()