Posts

Showing posts with the label Machine Learning

Featured Post

ESP32 SDR: from failed 433 MHz experiments to live phone decoding

-
Image
An ESP32-S3 investigation, updated with live Android decoding and physical tests on 17 October 2026. An ESP32-S3 can expose real radio samples. The question is how far that capability carries toward useful applications. Conceptual illustration. I wanted to turn an ESP32 into something more ambitious than another Wi-Fi gadget: a small radio instrument that could capture a remote-control transmission, send the recording to a phone, decode it and eventually reproduce it. The starting point was the ESPARGOS esp-sdr project , which exposes raw radio samples from hardware already inside supported ESP32 chips. That is an exciting capability. It also raises an easy-to-misunderstand question: if software can ask the chip to tune to a frequency, can the chip actually receive useful information there? We tested that question through firmware changes, controlled radio transmissions, independent receivers and a Flutter phone app. We tried GPS, broadcast FM, 433 MHz remote-control signals, n...
Post a Comment
Read more

Running four AI models fully offline on a Nextion ONX3248G035

-
Image
A while back I unboxed a Nextion touchscreen dev board and vibe-coded a WiFi auditor onto it . That board has been sitting on my desk ever since, and one question kept nagging: this thing has 8 MB of PSRAM and a dual-core ESP32-S3. Could it run an actual language model? Not talk to one over WiFi — run one. Turns out: yes. Four of them, in fact. No internet, no server, no phone, no PC. Everything in this video is generated by the chip on the board. All four models, on the board, offline. Loading a model from the SD card, then generating. What is actually running The board boots into a menu. Tap a model, it loads and starts generating. All of these were trained from scratch on an M2 Max in well under an hour. Malayalam English Arithmetic Icons Parameters 7.6M 7.6M 1.0M 577K Flash 3.95 MB 3.95 MB 0.41 MB 0.58 MB Speed 13.0 tok/s 14.9 tok/s 20.7 tok/s 3.4 s/image First things first: this is not a Nextion HMI The ONX3248G035 is sold under Nextion branding, and the name is...
3 comments
Read more