IoT

Everything tagged “IoT” across notes, resources, and Mochi logs.

ESP32 development board wired to a compact cellular IoT modem and LTE antenna on a maker workbench

NotesFirmwareSeptember 8, 2026

5G IoT with ESP32: Connect NB-IoT & LTE-M from Modem to MQTT

A practical ESP32 guide to integrating an NB-IoT/LTE-M modem: choose the network, power it safely, wire UART, use TinyGSM and send first telemetry.

ESP32 Firmware IoT NB-IoT LTE-M Open Source

ESP32 development board beside a laptop showing a firmware deployment dashboard on an electronics workbench

NotesFirmwareSeptember 7, 2026

Over-The-Air (OTA) Firmware Updates: Design & Implementation

A practical guide to designing safe OTA firmware updates for ESP32 and STM32, covering partitions, signed images, rollback, rollout control, and delta updates.

OTA Firmware Update ESP32 STM32 Secure Boot Embedded Systems IoT Rollback Delta Update

Three Bluetooth module boards arranged on a used ESD workbench beside a multimeter and precision screwdriver

NotesHardwareSeptember 6, 2026

HC-05 vs HM-10 vs BLE 5.0: Which Bluetooth Module Should You Choose?

Compare HC-05, HM-10, and BLE 5.0 modules by Bluetooth Classic, BLE GATT, UART, phone support, range, power, and integration for Arduino, ESP32, and IoT projects.

Bluetooth Bluetooth Classic BLE Arduino ESP32 IoT Hardware

An ESP32-S3 development board beside a BME280 sensor and MacBook Pro displaying a local sensor dashboard on a realistic electronics workbench

NotesFirmwareSeptember 5, 2026

ESP32 Beginner Guide – P5: Wi-Fi and Web Server

Connect ESP32 to Wi-Fi, find its IP address, and build a local web server that displays BME280 temperature, humidity, and pressure in a browser.

ESP32 Beginner Guide Wi-Fi Web Server IoT Arduino-ESP32

ESP32 IoT learning roadmap represented by connected prototype stages on a real electronics workbench

NotesFirmwareSeptember 3, 2026

ESP32 IoT Project Roadmap: From LED to Production

An interactive ESP32 project roadmap from LEDs and buttons through connected sensors and edge ML to production OTA and security, with practical guides at each level.

ESP32 IoT Project Roadmap Beginner Guide ESP-IDF TinyML OTA IoT Security

ESP32 development boards prepared for a beginner project beside a MacBook Pro on a real electronics workbench

NotesHardwareSeptember 2, 2026

ESP32 Beginner Guide – P1: What Is ESP32 and Choose ESP32

Learn the difference between ESP32 chips, modules, and development boards, then choose an ESP32-C3, ESP32-S3, or classic ESP32 board without buying hardware you do not need.

ESP32 Beginner Guide Development Boards ESP32-C3 ESP32-S3 IoT

ESP32 development board being checked with multimeter probes on a practical electronics workbench

NotesHardwareAugust 31, 2026

18 Common ESP32 Errors and How to Fix Them – Part 1

How I troubleshoot eight common ESP32 problems: flashing, boot mode, brownouts, serial, GPIO, I2C, SPI, and custom PCB bring-up.

ESP32 Troubleshooting Hardware ESP-IDF IoT