Topic desk
Sensors, radio, control and safety in the physical world
15
context-rich bilingual stories
IoT & Robotics
5 minWith processors, Wi-Fi, Bluetooth, GPIO, timers and power modes on one chip, the ESP32 accelerates prototypes—but pin, voltage and radio limits still matter. This guide opens the subject through context, evidence, Bangladesh relevance and practical verificati…
IoT & Robotics
5 minA low-cost camera enables useful projects while capturing sensitive faces, homes and locations; local processing and data minimisation belong in the first sketch. This guide opens the subject through context, evidence, Bangladesh relevance and practical verif…
IoT & Robotics
5 minSome Arduino boards favour simple timing and a broad learning ecosystem; ESP32 leads when connectivity, compute and power modes matter. This guide opens the subject through context, evidence, Bangladesh relevance and practical verification.
IoT & Robotics
5 minThe SX1278 handles frequency synthesis, modulation, packet framing and received-signal measurement; MCU configuration and the antenna system complete the link. This guide opens the subject through context, evidence, Bangladesh relevance and practical verifica…
IoT & Robotics
5 minChirp spread spectrum distributes a signal across time and frequency so weak signals remain detectable, trading against airtime and data rate. This guide opens the subject through context, evidence, Bangladesh relevance and practical verification.
IoT & Robotics
5 minOff-grid messaging needs sender authentication, replay protection, key lifecycle and delivery acknowledgement alongside confidentiality. This guide opens the subject through context, evidence, Bangladesh relevance and practical verification.
IoT & Robotics
6 minSubtracting path, cable and system loss from transmitted power and antenna gains estimates received power; real obstacles demand extra margin. This guide opens the subject through context, evidence, Bangladesh relevance and practical verification.
IoT & Robotics
5 minRuntime depends not only on sleep current but sensor warm-up, radio transmission, regulator loss, self-discharge and temperature. This guide opens the subject through context, evidence, Bangladesh relevance and practical verification.
IoT & Robotics
5 minSensor readings become meaningful when calibration, timestamps, units, missing values and device identity share one schema. This guide opens the subject through context, evidence, Bangladesh relevance and practical verification.
IoT & Robotics
5 minA microcontroller pin cannot supply motor current; a driver handles switching, direction, braking and protection. This guide opens the subject through context, evidence, Bangladesh relevance and practical verification.
IoT & Robotics
5 minA typical hobby servo maps pulse width to a target position, while load, backlash, power dips and mechanical stops limit precision. This guide opens the subject through context, evidence, Bangladesh relevance and practical verification.
IoT & Robotics
5 minSeparating wheels, sensors, cameras and communications into modules simplifies testing; a prototype cannot be described as rescue-ready without real safety validation. This guide opens the subject through context, evidence, Bangladesh relevance and practical…
