#LVGL v7.0.0 released yesterday, upgrading an existing project will be a pain in the @$$ given the material changes introduced.. https://github.com/lvgl/lvgl/releases
2014 wireless power consumption monitor project
Updated a 2014 wireless power consumption monitor project of mine to be compatible with my latest generation project hardware and backend #homeautomation #IoT #esp32
DIY Samsung SmartThings compatible smart switch
A short video demo of a DIY Samsung #SmartThings compatible smart switch based on #ESP8266 #IoT https://www.youtube.com/watch?v=hHYTRrmYBGY
Samsung smartthings capable esp32 smart switch
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.
Secured MQTT channel
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 PiTFT and Chromium
#raspberrypi #flightradar24 monitor using @adafruit 3.5" PiTFT and Chromium in kiosk mode
ncdu saves the day when my blog VPS goes crazy
#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
3.5″ PiTFT as security camera monitor
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
Working from home the next couple weeks
Will be working from home the next couple weeks, you guessed why
Cloudflare WARP on my Mac
Installed Cloudflare WARP on my Mac, pretty good instructions here: https://www.youtube.com/watch?v=eeHO5NZGkBI
PS Thermo
New post: Meet the PS Thermo https://wp.me/pawL3e-1m2
Air quality sensor
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.
Simulink modeled software component into an ESP32 project
Successfully integrated a rather complex Simulink modeled software component into an ESP32 ESP-IDF/Eclipse project via code generation. Pretty impressed with the outcome and how fast the SWC was developed this way. #esp32 #simulink #freeRTOS #embedded
FreeRTOS CPU load monitoring
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..
Booting Linux on ESP32
Booting Linux on ESP32? https://www.reddit.com/r/esp32/comments/dtlj7n/booting_linux_on_esp32_realtime_video/?utm_medium=android_app&utm_source=share
Committing three weeks’ worth of changes
Committing three weeks' worth of changes..phew
GUI visualization of a 424-510MHz spectrum scan
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
RFM69 spectrum scanner
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:
Atmega328 OTA update over RFM69 wireless link
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.
CurrentRanger worth the 160 €
I am caught up in a "want vs need" dilemma regarding LowPowerLab's CurrentRanger https://lowpowerlab.com/guide/currentranger/ Anyone who owns one (or the original uCurrent): is it worth the 160 € it costs here in the EU?
Cleaning up my workbench space
Fooling myself that I'm cleaning up my workbench space, while actually moving things out of sight. Too embarrassed to share a photo.
Don’t trust the 3D model
Don't trust the 3D model 😉
Arduino within Eclipse C/C++ IDE
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.
WiFi AP association timeout on an ESP32 project
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
Dealing with bugs..
Software low-pass filter on a remote humidity sensor’s
Added a software low-pass filter on a remote humidity sensor's readings, the result is quite obvious
Thoughts on structuring a productive software development
New post: Thoughts on structuring a productive software development team https://wp.me/pawL3e-1kv
PE2
Knowing what PE2 is is a sign of aging says a colleague with irony.. oh, well, not only do I know what it is, but I have used it for quite a while back then.
WROOM-32 downloader boards
Got one of the WROOM-32 downloader boards, may come in handy.. #esp32
LoraWAN based product family
Considering creating a new LoraWAN based product family, targeting industrial and agricultural IoT
RFM69 based keyfob backup for DIY sliding door opener
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
Securing MQTT for embedded IoT devices with Mutual TLS
Last-minute preparations for the "IoT Bulgaria Summit 2019" event tomorrow, Sept 14, 2019. My session topic is "Securing MQTT for embedded IoT devices with Mutual TLS Authentication", starting 9:30am. Register for free here: https://www.eventbrite.com/e/iot-bulgaria-summit-2019-tickets-54290900545 The slides I presented are available here: https://drive.google.com/file/d/1FglRqRC5rAlap4HCLp-MgqwR1gnZMIVc/view?usp=sharing