This is a Pet Tracker Reference Design based on STM32L4. Tracker connects with network by SIM800L module connected to the STM. Also MCU connected to the GPS by uart and send data to server #STM32 #GPS #G4 #G3 #LTE #IoT #Tracker #smartHomeDevices #referenceDesign #edge-computing #edgeComputing #stm #template #referenceDesign

This project is designed to measure water level of two tanks using ultrasonic sensors interfaced with the ESP32 microcontroller. The design leverages the processing power and wireless connectivity of the ESP32 to accurately monitor water levels and support automated water management processes. Key components include two ultrasonic sensors for precise distance measurement, robust voltage regulation using an LM2596 buck converter, and reliable power management circuits. Its modular design approach facilitates easy expansion and integration with other systems, making it an ideal solution for both DIY enthusiasts and professionals in automated fluid control and IoT applications. #ESP32 #UltrasonicSensor #WaterLevelSensor #LM2596 #VoltageRegulator #ModularDesign #IoT #DIYProjects #ElectronicsDesign #automation

This project is a reference project for ESP32-S3-WROOM-1 to develop your IoT ideas. The board has 3 LEDs, USB C for firmware, EN and BOOT buttons, and 2 IO connectors for development #IoT #WiFi #MCU #RF #ESP32 #project #referenceDesign #simple-embedded #espressif #template #reference-design

This is the general design of the R7FA4M1AB3CFM with the minimum configuration for its operation and USB C with LDO and SD card #arm #M4 #IoT #referenceDesign #mcu #renesas #template #reference-design

The "Green Dot 2040E5" Board is a Node that interfaces RS485 Sensor probes and can log information to the cloud using LoRa Connectivity. It uses the XIAO RP2040 and the LoRa-E5 (STM32WLE5JC) modules from Seeed Studio to do its magic. It also has amazing power management capabilities (Solar charging, Battery protection, etc) that make it very useful for IoT applications #internetOfThings #smartHomeDevices #SeeedStudio #XIAO #LoRa #RP2040 #IoT

This project is a reference project for ESP32-S3-WROOM-1 to develop your IoT ideas. The board has 3 LEDs, USB C for firmware, EN and BOOT buttons, and 2 IO connectors for development #IoT #WiFi #MCU #RF #ESP32 #project #referenceDesign #simple-embedded #espressif #template #reference-design

Architectural Lavender Translation Collar – ESP32‑S3 Wi‑Fi + LoRa, USB‑C, Li‑ion, low‑power design Overview Experience a cutting-edge IoT solution with this low‑power board built around the ESP32‑S3‑MINI‑1‑N8. Designed for seamless Wi‑Fi (2.4 GHz), BLE, and LoRa (868 MHz) connectivity, this board integrates ENS161 and ENS210 sensors over I2C alongside an RFM95W‑868 LoRa radio on SPI. It is powered via a 3.7 V Li‑ion cell with USB‑C charging up to 500 mA, complete with full battery protection, a robust 3.3 V rail tailored for Wi‑Fi burst currents, and per‑peripheral power gating to enhance energy efficiency. Core Features • MCU: ESP32‑S3‑MINI‑1‑N8 equipped with an onboard PCB antenna for 2.4 GHz Wi‑Fi/BLE, ensuring optimal wireless performance. • Sensors: Integrated ENS161 and ENS210 sensors utilize a shared I2C bus with controllable 4.7 kΩ pull‑ups for streamlined communication. • LoRa Radio: The RFM95W‑868 module, connected via SPI, enables long‑range communication at 868 MHz. Power & USB‑C Connectivity • Battery: A reliable 3.7 V 1200 mAh Li‑ion battery connected via a right‑angle JST‑PH 2‑pin connector features built‑in battery protection. • Charging: The USB‑C receptacle, with CC resistors and TVS protection on D+/D− along with series resistors, supports fast, safe charging with a current limit of 500 mA. • Regulation: A dedicated 3.3 V regulator capable of handling Wi‑Fi burst currents coupled with bulk and high‑frequency decoupling ensures stable operation, supported by status LEDs indicating power and charge states. Low‑Power Control • Peripheral Management: Load switches allow selective power‑gating of the ENS161, ENS210, and RFM95W modules, controlled directly by ESP32‑S3 GPIOs. • Energy Efficiency: Controllable I2C pull‑ups minimize idle current, vital for prolonged battery life in IoT applications. RF and Antenna Integration • 2.4 GHz: Utilizes the integrated PCB antenna on the ESP32‑S3 with proper ground/metal keep‑out zones for optimal signal integrity. • 868 MHz: Features a controlled‑impedance feed from the RFM95W to a PI matching network (C‑L‑C pads) with flexible antenna options—selectable via SMA connector, chip antenna, or PCB trace—and includes RF ESD protection. Connectivity & Debug Features • USB‑C Interface: Provides secure data connectivity with integrated safeguards and proper terminations. • Debugging: A comprehensive programming/debug header exposes EN, BOOT, and UART lines, with test points on key rails and buses (3V3, VBAT, SCK, MOSI, MISO, SDA, SCL, RESET/EN, GND) to simplify development and troubleshooting. Design Verification • Rigorous ERC/DRC and decoupling checks ensure adherence to component ratings and optimal signal routing. • Maintain RF keep‑outs and impedance‑controlled traces for both 2.4 GHz and 868 MHz paths, securing reliable performance even during high‑intensity operations. #IoT #ESP32S3 #LoRa #LowPowerDesign #USB-C #WirelessConnectivity #BatteryPowered #RFDesign

Smart Wellhead Controller V1.1: ESP32 + LoRa Industrial IoT Node with Solar Power, Deep-Sleep Leak Sensing, and OLED HMI. Now upgraded with a solar charging and battery management stage featuring a TP4056/CN3791 charger IC, power-path switching, Li-ion battery protection, and integrated 3.3 V rail supply. #PowerBlock #SolarCharging #BMS

Battery-Powered IoT GPS Tracker — Power / Protection Review Summary (Updated)

SoundBox adalah perangkat IoT untuk notifikasi suara pembayaran. Saat pembayaran diterima melalui MQTT, perangkat akan memainkan audio yang menyebutkan nominal dalam Bahasa Indonesia.

ESP12F IoT Node with SIM800L Cellular, MT3608/AMS1117 Power, SPI Flash, I2S Audio, USB-C UART, and Li-Ion Management

Battery-Powered IoT MQTT Notifier with USB-C Power-Path Charging, Multi-Rail Power Architecture, and 3 s Long-Press PFET Power-Gate (MP5014 + LTC2955 + MCU SYS_EN Override) #power_control #long_press #load_switch #sys_en

This project is designed to measure water level of two tanks using ultrasonic sensors interfaced with the ESP32 microcontroller. The design leverages the processing power and wireless connectivity of the ESP32 to accurately monitor water levels and support automated water management processes. Key components include two ultrasonic sensors for precise distance measurement, robust voltage regulation using an LM2596 buck converter, and reliable power management circuits. Its modular design approach facilitates easy expansion and integration with other systems, making it an ideal solution for both DIY enthusiasts and professionals in automated fluid control and IoT applications. #ESP32 #UltrasonicSensor #WaterLevelSensor #LM2596 #VoltageRegulator #ModularDesign #IoT #DIYProjects #ElectronicsDesign #automation

Smart Chair V1: ESP32-C3-based seat-occupancy and posture sensing hub with 4× FSR channels and IMU over I2C, featuring corrected USB-C power wiring with TVS protection, remapped I2C on IO4/IO5 with pull-ups, dedicated PROG_TX/PROG_RX/BOOT/EN test pads, and antenna keep-out zone #consumer-electronics #BLE #I2C #USB-C #IoT

Integrated ESP32 IoT Audio/LTE Node with Completed Power, USB, Test, and RF Topology

Smart Toto IoT Control Module with Enhanced Protection and RF Design

AvocAudio is a compact tinyML community board designed for extensive audio data collection for various tinyML applications. It leverages the Raspberry Pi RP2040 and integrates a LoRa-E5 LoRaWAN Transceiver Module for connectivity. Equipped with an SD card slot for local data storage, the board ensures efficient data collection. The board operates on solar power or a lithium-ion battery, ensuring flexible and efficient energy use. #audioDevices #raspberryPi #rp2040 #lorawan #iot #solar

This project is a reference project for ESP32-S3-WROOM-1 to develop your IoT ideas. The board has 3 LEDs, USB C for firmware, EN and BOOT buttons, and 2 IO connectors for development #IoT #WiFi #MCU #RF #ESP32 #project #referenceDesign #simple-embedded #espressif #template #reference-design

This is an ESP32-C3 reference design based on the manufacturer's recommendations with a uFL SMD antenna and USB C on board #WiFi #ESP32-C3 #IoT #referenceDesign #simple-embedded #espressif #template #reference-design

A smart ESP32-based battery management system controller board for Lithium ion battery packs/cells. Capable of communicating to wide varieties of hybrid-smart inverters with CANbus, RS485 and UART communication. Inspired by the open-source project diyBMS by Stuart Pittaway #smartHomeDevices #esp32 #iot

This project is a reference project for ESP32-S3-WROOM-1 to develop your IoT ideas. The board has 3 LEDs, USB C for firmware, EN and BOOT buttons, and 2 IO connectors for development #IoT #WiFi #MCU #RF #ESP32 #project #referenceDesign #simple-embedded #espressif #template #reference-design

This is an office productivity hub featuring an STM32F103C8T6 MCU, GC9A01A display driver, voltage regulator, capacitors, resistors, switches, USB-C, and SWD header. #referenceDesign #edge-computing #edgeComputing #stm #template #iot #stm32f1 #reference-design

This is an ESP32-C3 reference design based on the manufacturer's recommendations with a uFL SMD antenna and USB C on board #WiFi #ESP32-C3 #IoT #referenceDesign #simple-embedded #espressif #template #reference-design

This project is a reference project for ESP32-S3-WROOM-1 to develop your IoT ideas. The board has 3 LEDs, USB C for firmware, EN and BOOT buttons, and 2 IO connectors for development #IoT #WiFi #MCU #RF #ESP32 #project #referenceDesign #simple-embedded #espressif #template #reference-design

This project is an IoT development board based on the ESP32-H2-WROOM-03 module, featuring USB-C connectivity for power and communication. The board also includes two buttons, several decoupling capacitors, and a couple of connectors for peripheral connections. The onboard USB-to-UART bridge facilitates communication with a host device. #referenceDesign #esp32 #iot #esp32-h2 #project #template #reference-design