bootrino

import boto3
import json
import jmespath

s3 = boto3.resource('s3')
ec2 = boto3.resource('ec2')

# creates a hosts file for all running ec2 instances
# you can add alias hostnames by adding a tag "hostname" to the EC2 instance

bootrino

# this would need to be thought through and edited to make it work properly. The bits are cut out of a larger working solution.

import psycopg2
import psycopg2.extras
import aiopg
import asyncio
import json
from urllib.parse import quote
import atexit
from psycopg2.extensions import AsIs

bootrino

# untested code fragments for Postgres NOTIFY and LISTEN from nodejs

const {Pool, Client} = require('pg')
const dbUsername = 'dbusername'
const dbHost = '127.0.0.1'
const dbPort = '5432'
const dbPassword = 'supersecret'
const dbDatabasename = 'dbname'
const connectionString = `postgresql://${dbUsername}:${dbPassword}@${dbHost}:${dbPort}/${dbDatabasename}`
const pool = new Pool({connectionString})

bootrino

    async function buildGIF(frames: any) {
        let firstFrame = new PNG(frames[0].dataBytes);
        let width = firstFrame.width;
        let height = firstFrame.height;
        //console.log(frames.length + " frames at " + width + "x" + height);
        let encoder = new GIFEncoder(width, height);
        encoder.createReadStream().pipe(fS.createWriteStream('output.gif'));
        encoder.start();

        let framePromises = frames.map(async (frame: any) => {

bootrino

     async function transformImage(dataBytes: any) {
     //let convert = async(dataBytes: any) => sharp(dataBytes).background({r: 255, g: 255, b: 255, alpha: 0}).toFormat('png').toBuffer()
     let convert = async(dataBytes: any) => sharp(dataBytes).toFormat('png').toBuffer()
     dataBytes = await(convert(dataBytes))
     return dataBytes
     }

bootrino

// this is a hack of:
// https://github.com/gtalusan/esp-idf/blob/master/examples/bluetooth/a2dp_source/main/main.c
// the idea is to be able to play an audio file from an esp32's flash memory directly to a bluetooth audio speaker
// refer to here for the notes on what you need to do to pull it all together


/*
   This example code is in the Public Domain (or CC0 licensed, at your option.)

   Unless required by applicable law or agreed to in writing, this

bootrino

source: https://github.com/earlephilhower/ESP8266Audio/blob/2f2898c49612f1cc1351b44ffe8541def5a26b23/src/AudioGeneratorMIDI.cpp#L71

void AudioGeneratorMIDI::midi_error(const char *msg, int curpos)
{
  cb.st(curpos, msg);
#if 0
  int ptr;
  Serial.printf("---> MIDI file error at position %04X (%d): %s\n", (uint16_t) curpos, (uint16_t) curpos, msg);
  /* print some bytes surrounding the error */
  ptr = curpos - 16;

bootrino

unsigned char bytes[4];
bytes[0] = (u32 >> 24) & 0xFF;
bytes[1] = (u32 >> 16) & 0xFF;
bytes[2] = (u32 >> 8) & 0xFF;
bytes[3] = u32 & 0xFF;
for(int i = 0; i < 4; i++)
{
  if (i == 0) Serial.print("0x");
  Serial.print(bytes[i], HEX);
  if (i < 3) Serial.print(":");

bootrino

  Serial.printf("---> %04X : foo\n", (uint32_t) u32);
  //Serial.printf("---> %04X (%d): \n", (uint32_t) u32, (uint16_t) curpos);

bootrino

    int x = 0;
    for (int i = 0; i < buffSize; i++)
    {
      x = i % 32;
      if (x == 0)
      {
        Serial.print("\n");
      }
      Serial.printf("%02X: ", data_out[i]);
      Serial.flush();