Open Source Projects

Overview

QuarkDB is an open-source NoSQL database designed specifically for Arduino-based microcontroller platforms. It leverages ArduinoJson 6 to manage JSON documents on resource-constrained hardware, making it perfect for edge computing and IoT applications.

Key Features

Database Operations

QuarkDB supports fundamental CRUD operations optimized for microcontrollers:

• Create: Initialize lists with names under 12 characters
• Add: Insert JSON records (default 500-byte limit per record)
• Retrieve: Query with filters using comparison operators
• Update: Replace matched records entirely
• Delete: Remove specific records or entire lists

Configuration

QuarkDB provides sensible defaults while allowing customization:

• Maximum 300 records per list (configurable)
• 500 bytes per record limit (configurable)
• Dedicated APIs for configuration management

Overview

Quarkifi Stream OTA is an open-source Arduino library that enables seamless over-the-air firmware updates for ESP8266 and ESP32 microcontrollers. It integrates directly with the Quarkifi Stream Platform via MQTT, allowing you to push firmware upgrades to your IoT devices remotely — no physical access required.

Key Features

API Reference

The library exposes three core methods:

• setCallback(fn): Register a function to receive OTA status and progress updates
• buildAuth(user, pass): Build an authentication token from credentials
• startOTA(url, auth): Initiate the firmware download and install from a given URL

Status Codes

The callback receives a status byte and a progress byte (0–100%). Status values include:

• 0–4: STARTING, DOWNLOADING, INSTALLING, SUCCESS, RESTARTING
• 10–17: ERR_BUSY, ERR_NO_WIFI, ERR_HTTP, ERR_NO_SPACE, ERR_WRITE, ERR_TIMEOUT, ERR_FINALIZE, ERR_RETRIES

Your callback must publish the following JSON back to the platform: {"ota_status__": <code>, "ota_progress__": <0-100>}