aws-lambda-dash-button.js

const https = require('https');
const url = require('url');
const slack_url = 'your_slash_url';
const slack_req_opts = url.parse(slack_url);
slack_req_opts.method = 'POST';
slack_req_opts.headers = {
    'Content-Type': 'application/json'
};

exports.handler = function(event, context) {
    
    console.debug(`Battery health: ${event.batteryVoltage} mv`)
    
    var req = https.request(slack_req_opts, function(res) {
        if (res.statusCode === 200) {
            context.succeed('posted to slack');
        } else {
            context.fail('status code: ' + res.statusCode);
        }
    });
    // "clickType": "SINGLE | DOUBLE | LONG"
    if (event.clickType == 'SINGLE'){
        var payload = {
        'text': '@here - Your sample msg',
        'username': 'YourUserName',
        'icon_emoji': ':ansible:'
        }
    }
    
    req.on('error', function(e) {
        console.log('problem with request: ' + e.message);
        context.fail(e.message);
    });

    req.write(JSON.stringify(payload));

    req.end();
        
};