Seesaw

Adafruit Seesaw boards driver for Node.js

Still under heavy development, support for the rest of functionalities will be added soon.

Installation

npm i -S @dawiidio/seesaw
// or
yarn add @dawiidio/seesaw

Usage

import i2c from 'i2c-bus';
import { Seesaw, SeesawPinMode } from '@dawiidio/seesaw';

async function main() {
    const address = 0x49 as const;
    const bus = await i2c.openPromisified(1);

    const device = new Seesaw({
        bus,
        address,
    });
    
    await device.detectHardware();
    // software reset, could be skipped
    await device.reset();

    const ledPin = 15;
    const adcPin = 2;
    await device.pinMode(ledPin, SeesawPinMode.OUTPUT);
    await device.pinMode(adcPin, SeesawPinMode.INPUT);

    setInterval(async () => {
        console.log('ADC >', await device.analogReadVoltage(adcPin));
        await device.toggle(ledPin);
    }, 1000);
}

main();

Supported functionalities

• [x] Device
• [x] Pin config
• [x] GPIO
• [x] ADC
• [ ] PWM
• [ ] UART
• [ ] Interrupts
• [ ] Eeprom
• [ ] Neopixel
• [ ] Touch buttons (may work with basic GPIO config)

Device

Reset

device software reset

await device.reset();

Pin config

import { Seesaw, SeesawPinMode } from '@dawiidio/seesaw';

//...

device.pinMode(15, SeesawPinMode.OUTPUT);
// or
device.pinMode(15, SeesawPinMode.INPUT);
// or
device.pinMode(15, SeesawPinMode.INPUT_PULLDOWN);
// or
device.pinMode(15, SeesawPinMode.INPUT_PULLUP);

GPIO

Write

const pinValue = true;
await device.digitalWrite(15, pinValue);

Read

const pinValue: boolean = await device.digitalRead(15);

Toggle

await device.toggle(15);

ADC

Read

Read raw ADC value

const adcValue: number = await device.analogRead(2); // int

Read voltage

const device = new Seesaw({
    bus,
    address,
    adcRefVoltage: 3.3 // by default 3.3, if your Seesaw board runs on 5v set 5 here
});

// ...

// below value will be based on voltage set in the constructor settings  
const adcValue: number = await device.analogReadVoltage(2); // float

Supported microcontrollers

• [x] Attiny8xx
• [x] Attiny16xx
• [x] SAMD09