DEV.BG tech talk #3

I did a tech talk about my ESP32 based IoT control hub project on Feb 5th, 2019 at Work & Share Coworking Space Sofia. Over 100 people signed up for the event organized by DEV.BG, it was a pleasant surprise to see so many IoT enthusiasts show up – thank you! Unfortunately, I wasn’t allowed…

ESP32 OTA firmware update using MQTT over SSL

My recent IoT projects are capable of performing OTA firmware updates, I have previously blogged about the importance of this capability. I normally use MQTT over SSL as a means of communication between the edge nodes and the cloud backend, and the devices are subscribed to a dedicated ‘firmware notifications’ topic that alerts them of…

TFT32 Wi-Fi configuration GUI

I am working on a thermostat control project using the TFT32 hardware, let me share a video of the Wi-Fi configuration GUI (still work in progress). The Wi-Fi provisioning via GUI addresses one of the significant challenges when setting up an IoT product – the initial setup. I have already blogged on this subject a…

ESP32

I’m one of the lucky 200 that got their hands on the early beta of Espressif’s new ESP32 chip evaluation board. It is the “big brother” to the popular ESP8266, Espressif has though noted that it should not be treated as an ESP8266 replacement¬†and that it is targeting “different market”. The specs are impressive indeed,…