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Experimenting with #Samsung #smartthings capable #esp32 smart switch using their SDK and ESP-IDF. There is no need for a hub, works directly with the Smart Things app.

Connected my home alarm system to a secured #MQTT channel and am able to arm/disarm/read state remotely via Node-red powered UI #IoT #IoT #arduino #homeautomation Used the code by https://github.com/maragelis/ParadoxRs232toMqtt

#raspberrypi #flightradar24 monitor using @adafruit 3.5" PiTFT and Chromium in kiosk mode

#ncdu saves the day when my blog VPS goes crazy due to running out of disk space. Turns out a pesky log not being truncated and yours truly not setting an alert for situations like this 😉 https://dev.yorhel.nl/ncdu

Using a 3.5" PiTFT as security camera monitor with a ffmpeg one-liner #rtsp #raspberrypi ffmpeg -rtsp_transport udp -i rtsp://192.168.1.123:554/12 -pix_fmt rgb565le -s 480×320 -f fbdev /dev/fb1

I just activated a http://luftdaten.info air quality sensor, will be contributing from my home in the suburbs that was missing air quality info. Where I live I measure PM2.5 to be 7.8 µg/m³, but overall air quality in Sofia right now is outrageous.

Added FreeRTOS CPU (both cores) load monitoring (for power management strategy implementation) from my TFT32 project. Pleased to see how efficient the code is, CPU load at 8% and 10% respectively for core 0 and 1..

Committing three weeks' worth of changes..phew

Added GUI visualization of a 424-510MHz spectrum scan using RFM69 and ESP32. Note the peak at 433MHz, I was holding a 433MHz door opener keyfob to test it

Picking a free RF channel is fundamental for good link quality. Working on a RFM69 spectrum scanner that will suggest free channel upon pairing a wireless sensor with the gateway. The RSSI spectrum looks like this where I live (suburban), there is an obvious band to avoid:

Experimenting with Atmega328 OTA update over RFM69 wireless link, works fine. Remaining is to implement this+GUI on the TFT32 esp32-rfm69 gateway project, so it can reflash the relay actuators if needed.

Don't trust the 3D model 😉

I rarely use Arduino nowadays, one reason is its amateur-ish IDE. Thankfully there are alternatives like using it within Eclipse C/C++ IDE, which partially deals with my Arduino intolerance in the rare cases I resort to it.

Had to increase a WiFi AP association timeout on an ESP32 project, it was failing to connect in <15 sec. What is the recommended time to wait before considering a connection attempt timed out?

Dealing with bugs..

Added a software low-pass filter on a remote humidity sensor's readings, the result is quite obvious

Got one of the WROOM-32 downloader boards, may come in handy.. #esp32

Toying with an old project of mine, a RFM69 based keyfob. Added support for it to my DIY sliding door opener to act as a backup, when the Internet is down and I can't use the app on my phone

Injection molded enclosure for the ESP32 based thermostat controller, looks and feels pretty neat #IoT

Interfacing an ESP32 gateway with a wireless 433Mhz fire alarm, see it in action https://youtu.be/4-7YdF4ifOU #IoT #esp32 #smarthome

49mA with display off and maximum wifi power savings + DFS enabled while maintaining WiFi and 433Mhz connections to low power battery sensors Note that this is at 5.12V or roughly 80mA on 3.3V; CPU speed varied between 160 and 80Mhz as needed