Testing compressed binary OTA firmware update for #ESP32, similar to http://esptool.py's serial flash compression. Speeds up OTA by reducing the size of the image transfer over a sometimes unreliable/slow internet connection.. works over HTTPS and MQTTS #IoT
ESP32 OTA using MQTT over SSL
#ESP32 OTA using #MQTT over SSL as transport and Node-Red as provider A short write-up of this here: https://harizanov.com/2019/01/esp32-ota-using-mqtt-over-ssl-as-transport-and-node-red-as-the-bin-image-provider/
Dynamic frequency shifting, modem light sleep and TFT
Experimenting with dynamic frequency shifting, modem light sleep and TFT dimming to bring down power consumption to roughly 60mA while maintaining Wi-Fi connection to MQTT #ESP32
Battery-free sensor tag gathers energy from radio
Battery-free sensor tag gathers energy from radio frequencies https://www.engadget.com/2019/01/15/wiliot-battery-free-sensor-tag/ via @engadget
Universal USB interface cable
Got this universal USB interface cable today. Is the phone charger/interface hell repeating again?
Tweeting in base64 is any good
SnVzdCB3b25kZXJpbmcgaWYgdHdlZXRpbmcgaW4gYmFzZTY0ICBpcyBhbnkgZ29vZA
New toy ESP32 esp32-cam
Received a new toy #ESP32 esp32-cam
Thoughts on time/date management on IoT nodes
New post: Thoughts on time/date management on IoT nodes https://wp.me/pawL3e-1f0
DIY IoT control hub project
Join me on Feb 5 @DEV.BG Work & Share Coworking Space, 15-17 Tintyava str, Sofia where I will present a DIY #IoT control hub project I created. Event details: https://tinyurl.com/ya3egvup #ESP32 #homeautomation Got a notification that 100 already signed up for the event; Looking forward to a great networking tomorrow 🙂
Mediafire UM34C USB tester
Just received a Mediafire UM34C USB tester. First impressions are positive, might post a review later And of course I meant it is a RUIDENG UM34C 🙂
WiFi setup using touch GUI
WiFi setup using touch GUI makes the initial setup of an IoT device soo easy #LittlevGL #ESP32
TFT32 ESP32 based IoT control hub gateway with TFT
New post: TFT32 – ESP32 based IoT control hub/gateway with TFT, RFM69 and more https://wp.me/sawL3e-tft32
MQTT-ed my Christmass tree lights using TFT32
MQTT-ed my Christmass tree lights using TFT32 powered touch control. It sends Tasamota flashed Sonoff S20 commands over MQTT using #Arduino #littlevgl #ESP32 #TFT source code: https://github.com/mharizanov/TFT32/tree/master/examples/gui/mqtt_controller Buy TFT32 https://harizanov.com/product/tft32/ Merry Christmas!
TFT32 product wiki
Working on TFT32 product wiki https://harizanov.com/wiki/wiki-home/tft32/ , I will include Arduino example code soon #IoT #ESP32
TFT32 project e-shop
Just finished setting up a small e-shop for the TFT32 project on my blog grab one from here (I have only a few to sell): https://harizanov.com/product/tft32/
New product TFT32
New product: TFT32 https://harizanov.com/product/tft32/
20 pcs ESP32 TFT project ready
20 pcs #ESP32 TFT project ready 🙂
cURL for ESP32 OTA
Even better idea: switch to cURL for #ESP32 OTA, that will enable OTA over gzip compressed http(s) sources, (s)ftp, ssh #IoT
Compress OTA images to reduce OTA time
Idea: compress OTA images to reduce OTA time, similar to UART flash on #ESP32
GUI to monitor OTA updates to ESP32 TFT project
Added GUI to monitor OTA updates to #ESP32 TFT project
#brexit makes sense
Found this today, now #brexit makes sense. Agree?
3D printed enclosure for ESP32 TFT project
Testing 3D printed enclosure for #ESP32 TFT project #IoT, looks and feels much more finished now 🙂
Stocking tens of TFTs with touch
Stocking tens of TFTs with touch 🙂
SQLite DB on ESP32 on a SPIFFS partition
Experimenting with SQLite DB running on #ESP32, the database itself on a SPIFFS partition. I have some pretty interesting use cases in mind.. https://github.com/siara-cc/esp-idf #IoT
ESP32 graphical GUI resources in shared R/O SPIFFS
Moving #ESP32 graphical GUI resources to dedicated shared R/O SPIFFS partition to reduce main code partition sizes. This also decouples the code from GUI, allows easier branding/styling of the final product, but complicates OTA updates..
RFM69 for a LoRaWAN on my ESP32 TFT project
TO-DO: research project feasibility: swap the RFM69 for a LoRaWAN on my #ESP32 TFT project and use it as SIM-less urban car telemetry/location tracker
Developing connected thermostats
Planning to do a tach talk on topic "Developing connected thermostats" sometime in February, details will follow. http://dev.bg
Three-point resistive touch calibration GUI
Three-point resistive touch calibration GUI is now complete #ESP32 #IoT
20 PCBs for revision 6 of my ESP32 TFT project
20 PCBs for revision 6 of my #ESP32 #TFT project arrived. I think that it is complete now, need to stop shelling money on perfecting it at least 🙂 Now awaiting components delivery to run a small batch SMD assembly. I will have few spares to sell late December
High precision three-point resistive touchscreen calibration
I originally thought resistive touchscreen calibration is a mere interpolation of measured and actual coordinates, little did I know..Just finished implementing high precision three-point resistive touchscreen calibration functionality using TI's guideline http://www.ti.com/lit/an/slyt277/slyt277.pdf
ESP32 OTA over MQTT TLS
Working on native #ESP32 OTA over MQTT (TLS), the use case is that I have devices behind restrictive firewalls that block outgoing HTTP(S) connections but allow MQTT over TLS
ESP32 GUI translation proof of concept works well
#ESP32 GUI translation proof of concept works well. Thanks for the translation tips! #IoT