Hands-on guides to ESP32 and IoT projects, radio and LoRa, honest hardware comparisons, and how to protect your own devices. Written and tested by the team that designs SGP hardware.
Channel State Information, what a single ESP32 can measure, breathing detection, and the honest limits of doing it with one antenna.
Read the article →What Channel State Information is, how to capture it on an ESP32, presence and breathing detection, through-wall sensing, the IEEE 802.11bf standard, and the honest limits. With real demo videos.
Open the Wi-Fi CSI hub →The plain-English guide, with a demo and working code.
12 min→ Video · ESP32Enable CSI, read the callback, watch it react to movement.
Read→ Video · SensingWhat is real, what is hype, with a through-wall demo.
Read→Turn an ordinary Wi-Fi link into a camera-free motion and presence detector.
11 min→ ESP32 · BeginnerTen first projects, the parts you need, and what each one teaches.
Read→ Sensors · PresenceStill-person detection, distance, cost and tuning, compared with real numbers.
Read→How a low-power mesh carries texts for kilometres with no cell network.
Read→ Sub-GHz · ISMWhy lower frequencies travel further, and what runs on each band.
Read→ Compare · RadiosWhich radio fits your next project, with a clear decision guide.
Read→Cores, USB, Wi-Fi 6 and Thread, and when each family wins.
Read→ NFC · RFIDFrequencies, ranges and everyday uses, explained simply.
Read→ Compare · RadiosThe three most common radios, side by side.
Read→Phone alerts, Bluetooth scanning and a hot/cold signal search.
9 min→ Wi-Fi · HomeWPA3, guest and IoT networks, firmware and the settings that matter.
Read→ NFC · RFIDUnderstand the tech behind access cards and contactless.
Read→Want the hardware behind these projects? SGP devices are sold only at our official store.
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