Many embedded maker projects involve HTTP or MQTT communication and more often the question arises if one can secure that communication in an easy way. The answer can be tricky and heavily depends on the hardware and the OS or embedded framework being used. In this post we'll take a look at the ESP32 using the Arduino framework, and its capabilities regarding TLS.
Today we’re starting our latest tech blog series, this time about IT-Security related topics. We plan not to use any known vulnerabilities or flaws but instead we’ll present new discoveries made by our team. As well as this, we’ll be exploring areas which aren’t well documented or often talked about. With this in mind, this post will be focusing on the subject of Zero Rating.
Many developers see debugging as an essential feature within the software development process. The ability to stop a program at a given point and look into all internals can be very helpful to track down bugs and understand inner workings of libraries and data states. Debugging embedded targets can be a bit tricky: Typically one needs hardware debuggers, and the combination of IDE, debugger and probe needs to be configured, swapping out one target for another typically means reconfiguration and so on.
The Internet of Things is coming and different cloud service providers are offering multiple tools for IoT applications. These tools simplify implementations of connecting sensors/devices, data storage and real time data visualisation. When we reap the benefits of these services, IoT applications become more efficient, traceable and controllable.
Today we will disassemble and reprogram an IoT unit that already exists on the market; a WLAN power outlet. This unit has an ESP8266 controller inside and in this post we'll show you how to add the alternative firmware, Tasmota.
On its GitHub page, Tasmota is defined as "an alternative firmware for ESP8266 based devices like iTead Sonoff with web, timers, 'Over The Air' (OTA) firmware updates and sensors support, allowing control under Serial, HTTP, MQTT and KNX, so as to be used on Smart Home Systems. Written for Arduino IDE and PlatformIO."