You searched for esp32 board - CNX Software

March 16, 2026March 16, 2026

SparkFun OpenScale IoT – An ESP32 board with HX711 ADC for smart scales with WiFi and Bluetooth connectivity

The SparkFun OpenScale – IoT project is a ready-to-use ESP32-based IoT smart scale with open-source hardware and firmware support that makes it easy to read precise weight data from load cells without writing custom code from scratch for basic operation. It handles amplification via the HX711 24-bit ADC, calibration, temperature compensation (using the onboard TMP102 and an optional external DS18B20 probe), and serial output/configuration through a simple text-based menu. It also features Wi-Fi for live data and OTA firmware updates, requiring no dedicated apps—just standard terminal tools and a browser for viewing data. Additionally, there is a Qwiic I²C connector for adding extra sensors or displays. The board operates from 5 V with a typical current consumption of 80 to 100 mA, supports selectable output data rates of 10 or 80 SPS, and includes an adjustable gain for accurate measurements in long-term monitoring setups. SparkFun OpenScale – IoT Specifications: Wireless […]

Raspberry Pi Pico ESP32 board 3d printed breadboards

January 23, 2026

3D printed breadboards optimized for Raspberry Pi Pico and ESP32 boards

We’ve seen people try to make MCU development boards as breadboard-friendly as possible by leaving plenty of space to connect wires and components. lhm0 tackled the issue from the opposite direction and designed 3D printed breadboards optimized for Raspberry Pi Pico and ESP32 development boards. The Pico typically only leaves two rows of each side of a typical breadboard, and some ESP32 boards are wide enough to take all rows and, as a result, are unusable. The trick here was to design the breadboard for each board with an opening in the middle, so that they only take two rows (one on each side) on the 3D printed breadboard, and the user still has four rows on each side to play with, plus the top and bottom rows. We only have photos for two variants of the breadboard (highlighted in bold below), but a total of five breadboard designs are […]

WeAct CAN485 – A low-cost ESP32 board with CAN Bus and RS485 interfaces

WeAct CAN485 is a low-cost ESP32 board with CAN Bus and RS485 interfaces implemented through transceivers with 2.5kV isolation from Shanghai Chipanalog Microelectronics Co., Ltd. or Chipanalog for shorts. The board supports WiFi and Bluetooth LE through the ESP32 microcontroller and also features a microSD card slot, three switches for 120 Ohm termination and pull-up/pull-down resistors, Reset and User buttons, a USB-C port for programming, and a 2-pin terminal block taking 5 to 36V DC input power. WeAct CAN485 specifications: Wireless SoC – Espressif Systems ESP32-DOWD-V3 CPU – Dual-core processor @ 240MHz Memory – 520 KB SRAM, 16 KB SRAM in RTC Storage – 448 KB ROM Wireless – WiFi 4 and BLE connectivity Storage 8MB flash (W25Q64JVSSIQ) MicroSD card slot (SPI); note: the card needs to be removed when flashing the firmware. USB – USB Type-C port for power and programming ( via CH343P USB to TTL bridge) Serial […]

December 3, 2025

Silicognition ManT1S ESP32 board supports T1S single-pair Ethernet for robotics and automation (Crowdfunding)

Silicognition ManT1S is an ESP32 board with a 4-pole terminal block for T1S single-pair Ethernet (SPE) communication and daisy-chaining, as well as unpopulated headers for GPIOs and programming, and a Qwicc connector for I2C expansion. The IEEE 802.3cg 10BASE-T1S networking standard enables engineers and users to easily network and distribute power to up to eight T1S nodes over a single pair of wires, which makes it suitable for robotics, industrial/home automation, and other projects that benefit from a reduction in the number of cables and associated weight. The company also designed the ManT1S Bridge to interface a standard Ethernet RJ45 to a single-pair T1S mixing segment. ManT1S specifications: System-in-Package – ESP32-PICO-V3-O2 SoC – ESP32 CPU – Xtensa dual-core 32-bit LX6 microprocessor up to 240 MHz Memory – 520B SRAM Storage – 448 KB ROM Wireless – WiFi 4 and Bluetooth 4.2/5.x Memory – 2 MB PSRAM Storage – 8 MB […]

April 19, 2024April 19, 2024

SB Components LoRaWAN gateways and nodes are made for Raspberry Pi and ESP32 boards (Crowdfunding)

UK-based hardware developer, SB Components, has designed a new LoRaWAN product series (gateways and nodes) for the Raspberry Pi SBCs, Raspberry Pi Pico, ESP32, and other hardware, based on RAKWireless RAK5146 and RAK3172 modules. The products are available in up to five variants (plus two relay boards) and are built to cater to hobbyists with different needs. They support several LoRaWAN server platforms including The Things Stack, Chirpstack, and Helium, with adaptive spreading factors, coding rates, and bandwidth configurations. The LoRaWAN products include: Gateways – RAK5146 LoRaWAN Gateway HAT and RAK3172 LoRaWAN Gateway HAT for the Raspberry Pi SBCs Nodes – RAK3172 LoRaWAN Module (Powered by Raspberry Pi Pico), Raspberry Pi RP2040 USB Dongle, RAK3172 LoRaWAN Module (powered by ESP32), LoRaWAN Breakout, GatePi LoRaWAN 4-Ch Relay, GatePi LoRaWAN 8-Ch Relay LoRaWAN (long-range wide access network) uses the LoRa modulation technique to transmit data over large distances. In a LoRAWAN network, […]

Arduino ESP32 Web-based WiFi oscilloscope

February 19, 2024February 19, 2024

Esp32_oscilloscope Arduino firmware turns your ESP32 board into a web-based oscilloscope

Bojan Jurca’s “Esp32_oscilloscope” is an open-source Arduino sketch that can transform an ESP32 board into a web-based oscilloscope that works over WiFi. We had also written about the Scoppy project to turn the Raspberry Pi Pico W into a 2-channel oscilloscope, but there’s no reason the more powerful ESP32-series microcontroller could not be used for the same purpose, and Bojan’s Esp32_oscilloscope project does just that and works with ESP32, ESP32-S2, ESP32-S3 and ESP32-C3 boards using the I2S interface for fast data sampling. The project was initially designed to demonstrate the multitasking abilities of the ESP32 microcontroller with Arduino, but this evolved into an ESP32 oscilloscope firmware. It works both with output/PWM and input signals, digital (0 or 1) and analog (0 to 4095) signals, and the web interface shows up to 736 samples per screen although the sampling rate may not be completely constant all the time. To install it […]

Sparkfun's latest development board puts Espressif ESP32-PICO-MINI-02 on a compact Arduino Pro Mini footprint. It also includes an onboard QWICC connector for easy interfacing with a wide range of sensors and peripherals,

December 14, 2023December 14, 2023

ESP32 Qwiic Pro Mini is an ESP32 board in Arduino Pro Mini form factor

SparkFun’s latest development board, the ESP32 Qwiic Pro Mini, puts the Espressif ESP32-PICO-MINI-02 on a compact Arduino Pro Mini footprint. It also includes an onboard QWICC connector for easy interfacing with a wide range of sensors and peripherals. We have already covered other Sparkfun dev boards like DataLogger IoT, Datalogger IoT – 9DoF, and SparkFun Thing Plus Matter you can check those out if interested. Like any other ESP32 board, this also uses an ESP32 microcontroller which features a 32-bit dual-core processor, 520kB of SRAM, 2MB of PSRAM, 8MB of flash memory, and 16 kB of additional SRAM in its RTC. It supports Bluetooth 4.2 and BLE and has ADC and DAC, touch detection, PWM, TWAI, Ethernet MAC, UART, SPI, SDIO, I2C, and I2S interfaces. As reported in a Hackster article, the board also features a Qwiic Connector for solderless connections to sensor boards and add-ons, positioned at a 90-degree angle […]

July 18, 2023July 18, 2023

ESP32-S3 based Arduino Nano ESP32 board supports Arduino and MicroPython programming

The Arduino Nano ESP32 is an ESP32-S3-based WiFi and Bluetooth microcontroller board designed for IoT applications for hobbyists and enterprise use cases. The new Nano board comes with 8 MB PSRAM and 16 MB flash storage and can be programmed with either the Arduino or MicroPython languages. It’s not the first ESP32 board from Arduino, as the Nano RP2040 Connect pairs a Raspberry Pi RP2040 MCU with an ESP32 module from u-Blox and the just-released Arduino UNO R4 WiFi marries a Renesas RA4M1 Arm Cortex-M33 MCU with an ESP32-S3-MINI-1 module. But the Arduino Nano ESP32 is different since it’s the first ESP32 board from Arduino where the Espressif chip is the only microcontroller onboard and handles both wireless connectivity and GPIOs. Arduino Nano ESP32 specifications: Wireless module – u-Blox NORA-W106-10B with MCU – ESP32-S3 dual-core Xtensa LX7 microcontroller @ up to 240 MHz with vector extensions, 512KB SRAM, 384KB ROM, […]