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
RFM69 based keyfob backup for DIY sliding door opener
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
Injection molded enclosure for the ESP32 based thermostat
Injection molded enclosure for the ESP32 based thermostat controller, looks and feels pretty neat #IoT
ESP32 gateway with a wireless 433Mhz fire alarm
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
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
Private repositories
I've kept myself busy the last few months according to my Github contributions stats, working mostly on private repositories
Chrome 404 error title has an extra 1
It is just me, or @Google's Chrome 404 error title has an extra '1' instead of '!' ? Someone's Shift key must have slipped. I find it cute though, shows that there are humans behind it.. #bug #Google @Google Version 76.0.3809.100 (Official Build) (64-bit)
Uploading firmware and other partition items
Uploading firmware and other partition items like CA/client cert, cert key, NVS partitions, espfs images using @SpritesMods's esphttpd project https://github.com/Spritetm/esphttpd #ESP32
ESP-IDF to v3.3-rc
Upgraded my ESP-IDF to v3.3-rc, expecting the upgrade to v4.0 to be PIA given the number of material changes #ESP32
GUI to show serial debug output to the TFT
Added GUI to show serial debug output to the TFT https://youtu.be/19-C5f2eHmQ #esp32 #iot #lvgl #embedded
The “S” in IoT stands for Security
Reminder: the "S" in IoT stands for Security
13m³ pool water temperature just over 30°C
Our 13m³ pool water temperature reaching just over 30°C thanks to the DIY solar heater I blogged about last year https://harizanov.com/2018/07/diy-swimming-pool-solar-heater/ solar harvesting
Node-RED deserves more than this
Node-RED deserves more than this.. https://x.com/knolleary/status/1159172242665811968
Graphical resources of the TFT32 thermostat project
Considering moving all graphical resources (icons, fonts) of the TFT32 thermostat project to dedicated OTA update-capable partitions to allow GUI branding and customization. Few technical challenges to do so, but completely doable. PoC of that done, and working well. As a result of the decoupling of graphical resources from the code, the OTA image for…
ESP32 emulation in QEMU
Can't think of a reason why anyone would need an ESP32 emulation in QEMU, but TIL that it exis https://github.com/Ebiroll/qemu_esp32
Three ways of provisioning an ESP32 with WiFi credentials
Three ways of provisioning an ESP32 with WiFi credentials: smartconfig, AP captive portal, and GUI: https://www.youtube.com/watch?v=UNdZGgIRWVo
ESP32 based thermostat controller/gateway project with TFT
It's close to a year since I started working on my ESP32 based thermostat controller/gateway project with TFT display. It now has 120K+ lines of code (components included), work done entirely at nights/weekends. What's the longest you have worked on a passion project? #IoT https://x.com/mharizanov/status/1027868368500666368
A good introduction to the world of embedded microbit
Got one of these for my 10 y.o. daughter, a good introduction to the world of embedded #microbit
mqtt-explorer.com looks quite promising
https://mqtt-explorer.com/ looks quite promising, I need to take a closer look #MQTT #IoT
3D printed enclosure prototype for the ESP32 based IoT
3D printed enclosure prototype for the ESP32 based IoT thermostat controller project I have been tweeting about recently #esp32 #MQTT #smarthome #homeautomation #IoT #3Dprinting #design #Mechanical Need to adjust the UI for the display cover curves..
Pairing a and controlling with a touch GUI a 433Mhz
Pairing a and controlling with a touch GUI a 433Mhz wireless relay #IoT #esp32 #lvgl
ESP32 generated QR code with AP credentials
Using ESP32 generated QR code with AP credentials -> captive portal to configure the WiFi STA configuration in 5 seconds.. #IoT Isn't that cool?
Samsung S8’s camera app has built in QR code recognition
I didn't know that Samsung S8's camera app has built in QR code recognition, just pointing it to a QR with AP login details prompts connection UI..neat
Dynamic QR generation on ESP32
Experimenting with dynamic QR generation on ESP32. Useful for product registration with serial number by the end user witn an app #IoT
Do we really need to have all the answers
Do we really need to have all the answers?
1.5K followers woohoo
1.5K followers? – woohoo!
Arduino’s millis() overflows every approx. 50 days
Reminder to self: Arduino's millis() overflows every approx. 50 days, use if ((unsigned long)(millis() – previousMillis) >= interval) instead
Securing MQTT for embedded IoT devices with Mutual TLS
I'll be speaking at the "IoT Bulgaria Summit 2019" community event this September, session topic "Securing MQTT for embedded IoT devices with Mutual TLS Authentication". Use this opportunity to chat with me on anything IoT. https://www.eventbrite.com/e/iot-bulgaria-summit-2019-tickets-54290900545?utm-medium=discovery&utm-campaign=social&utm-content=attendeeshare&aff=estw&utm-source=tw&utm-term=listing @Eventbrite
Human workers are listening to recordings from Google
This is why I don't own voice assistants: human workers are listening to recordings from Google Assistant, too: https://www.theverge.com/2019/7/11/20690020/google-assistant-home-human-contractors-listening-recordings-vrt-nws#comments
Wireless battery temperature and humidity sensor revision
This is my latest wireless battery temperature and humidity sensor revision. It is optimized for long range (200m) and long life (2+ years sending once a minute). To be used with the display hub and relay actuator I tweeted recently #IoT #smarthome
BMW i3
Test drove BMW i3, lovely vehicle. Wishing I can afford one some day. #EV #BMW
Pear tree to the internet
Connected our pear tree to the internet. It will publish a notification when pears are ready to be picked up. #IoT #esp32 #homeautomation