Plant Bot ESP32-C3 Plant Monitor
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$12 Plant Bot is an ESP32-C3 soil sensor and pump driver for fully automated indoor plant care

The Plant Bot is an open-source, Internet-enabled plant monitor powered by the ESP32-C3 microcontroller and integrating a corrosion-resistant capacitive moisture soil sensor and a pump driver on a single printed circuit board, eliminating the need for additional cabling. The Plant Bot is designed to automate indoor plant care by combining moisture sensing, light sensing, and pump activation. It can be powered via USB or a single coin cell battery which lasts up to a week with daily updates. An onboard multi-color LED visually represents the current soil condition, ranging from red (dry) to blue (moist). The “Soil Level” line on the board indicates the maximum depth to which the sensor or device should be inserted into the soil. According to the maker, the Plant Bot will remain unaffected by corrosion if the soil level does not exceed this line. Other solutions we’ve covered with a soil sensor usually separate the […]

Stream210 module
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Realtek Ameba RTL8730E Cortex-A32 audio streaming module offers a cost-effective solution for wireless audio applications

StreamUnlimited and Realtek Semiconductor Corp have collaborated on the Stream210 audio streaming module based on the Ameba Smart RTL8730E Arm Cortex-A32 chip from the Ameba E series, with support for Wi-Fi 6, Bluetooth 5.3, and Matter for edge computing and IoT solutions. We have looked at previous Ameba IoT products, such as the Ameba RTL8722DM development board, Ameba Arduino, Ameba RTL8195AM module, and the Ameba RTL8710BN. The Ameba Smart chip is the first entry in the series to feature a Cortex-A32 processor. The Stream210 module is aimed at various audio and IoT applications, including digital radios, streaming audio receivers, wireless speakers, smart speakers, home automation products, and Wi-Fi headphones. Other wireless audio modules we’ve covered in the past include the Up2Stream Pro HiFi board, TTGO T9, and 8devices’ Tobufi module. Stream210 specifications: SoC – Ameba Smart RTL8730E dual-core Arm Cortex-A32 processor @ 1.3GHz Memory – 2Gbit RAM Storage – 2Gbit […]

ArmSoM RK3588 AIModule7 NVIDIA Jetson Nano-compatible SOM
LILYGO T-ETH Elite ESP32-S3 Ethernet board LoRaWAN mPCIE cellular expansion
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LILYGO T-ETH-ELite ESP32-S3 Ethernet PoE board supports stackable LoRaWAN and Cellular expansion modules

LILYGO T-ETH-Elite is an ESP32-S3-powered IoT board with an Ethernet RJ45 port supporting PoE and a 40-pin GPIO header for stackable shields that offer support for LoRaWAN, 2G, NB-IoT, or/and 4G LTE cellular connectivity. The ESP32-S3 board allows users to build gateways with Ethernet, WiFi, Bluetooth, GNSS, LoRaWAN, and Cellular (2G, NB-IoT, 4G LTE) connectivity, and they can easily switch cellular modules to match specific requirements. LILYGO T-ETH-Elite specifications: Wireless module – Espressif ESP32-S3-WROOM-1 MCU – ESP32-S3R8 dual-core Tensilica LX7 up to 240 MHz with 512KB SRAM, up to 8MB PSRAM Storage – 16MB flash Connectivity – WiFi 4 and Bluetooth LE 5 PCB antenna Storage – MicroSD card slot Networking – 10/100Mbps Ethernet RJ45 port via W5500 SPI to Ethernet chip USB – USB Type-C port for power and programming Expansion – 40-pin (mostly) Raspberry Pi-compatible GPIO header for shields (up to 23x GPIO, USB 2.0, UART, 5V, 3.3V, […]

s5 minitrekker trekker
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The S5 Trekker is a compact Meshtastic communication device for hikers and preppers

The S5 Trekker Bravo and the S5 Trekker Mini are two Meshtastic-enabled radios designed by SpecFive LLC, a team of engineers based in the United States. Both devices are based on the Heltec Wireless Tracker from Heltec Automation. The Wireless Tracker integrates Espressif’s ESP32-S3 system-on-a-chip, a 160 x 80 TFT LCD, a SemTech SX1262 LoRa chip, and a Unicore UC6580 GNSS chip. The MiniTrekker is much lighter than the Trekker Bravo and features a built-in attachment hook for connecting it with other gear. Both radios are built to be durable enough to resist the rigors of outdoor exploration. They come pre-flashed with the open-source Meshtastic software and are ready to be used out of the box. The S5 Trekkers are intended to be used when hiking, trekking, and partaking in other outdoor activities that take one away off the well-trodden path. It is also useful for setting up a reliable […]

LolRa
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LoLRa project – Transmitting LoRa packets without radio using CH32V003, ESP8266, or ESP32-S2 MCU

The LoLRa project is a firmware-only LoRa transmission open-source project that works without a Semtech radio and instead relies on an I2S or SPI interface (so not exactly bit-banging) to transmit data with microcontrollers such as WCH CH32V003, or Espressif Systems ESP8266 and ESP32-S2 microcontrollers. LoRa is a proprietary protocol by Semtech, but people have been trying to reverse-engineer the LoRa PHY for years, and this culminated with a LoRa GNU Radio SDR implementation last year. But CNLohr found out you don’t even need a radio to send LoRa packets and you can instead use SPI or I2S interfaces from general-purpose microcontrollers to send packets that can be decoded by commercial off-the-shelf LoRa gateways and other chips. The current implementation is designed for the  ITU Region 2 (aka The Americas) targeting the 902-928MHz frequency band, but the code could be changed for Region 1 (EU, Russia, Africa) to target 863-870MHz […]

ESP32 Smart PowerMeter
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ESPHome compatible “Smart Powermeter” supports up to 6 CT clamps

J.G.Aguado’s “Smart Powermeter” is an ESP32-S2 board with a 2.9-inch e-paper display designed to measure power consumption through up to six CT clamps, or Current Transformer clamps, that are each attached to one of the AC lines of a house or appliance. I used an MT87 Digital Clamp Multimeter nearly 10 years ago to easily and safely measure the power consumption of a whole house by simply clamping it on one of the cables outside and reading the results on the display. The Smart Powermeter works in the same way but can perform measurements for up to six devices, and besides seeing the results on the display the ESP32-S2 can also send the data to the cloud or local server for data gathering and analysis using ESPHome or Arduino firmware. Smart Powermeter specifications: Wireless module – ESP32-S2-MINI-1-N4R2 SoC – Espressif ESP32-S2FH4 CPU Single-core 32-bit LX7 microcontroller @ up to 240 […]

Rockchip RK3568, RK3588 and Intel x86 SBCs and SoMs in 2025
Adafruit MEMENTO ESP32 S3
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MEMENTO is an ESP32-S3-based, CircuitPython or Arduino programmable DIY camera module

Adafruit’s new MEMENTO – Bare Board Camera module is powered by the ESP32-S3 and can be programmed with CircuitPython or Arduino. The module includes a camera with an OV5640 sensor which features auto-focus capabilities and the board includes a 1.54″ 240×240 Color TFT to display the images. Previously we have covered many ESP32-based camera modules like the TinyML-CAM, the Arduino Nicla Vision, TTGO T-Camera, and many other camera modules that feature the OV5640 sensor you can check those out if interested. Features and Specifications of the MEMENTO ESP32 Camera Module: Processing and Connectivity ESP32-S3 Module Dual-core 240MHz Tensilica processor 8 MB Flash, 2 MB PSRAM WiFi and BTLE capabilities Camera and Display OV5640 Camera Module 5MP sensor 72-degree view Autofocus JPEG encoder 1.54″ Color TFT Display with 240×240 resolution Storage – MicroSD card slot (SPI) Ports and Expansion Two Digital/Analog Stemma Ports – JST PH-3 connectors for A0, A1, power, […]

ESP32-S3 Ethernet Board
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LILYGO T-ETH-Lite – An ESP32-S3 board with Ethernet, optional PoE support

LILYGO T-ETH-Lite ESP32-S3 is a new ESP32-S3 WiFi and Bluetooth development board with a low-profile Ethernet RJ45 connector using a WIZnet W5500 Ethernet controller, supporting PoE with an extra shield, and also equipped with a microSD card socket and expansion I/Os. ESP32-based development boards with Ethernet have been around for years including LILYGO’s own “TTGO T-Lite W5500“, but so far we haven’t many based on the more recent ESP32-S3 microcontroller except for the SB Components’ ESPi board that we covered last April. But LILYGO T-ETH-Lite ESP32-S3 adds another cost-effective board with Ethernet. LILYGO T-ETH-Lite ESP32-S3 specifications: Wireless module ESP32-S3-WROOM-1 MCU – ESP32-S3 dual-core LX7 microprocessor @ up to 240 MHz with Vector extension for machine learning Memory – 8MB PSRAM Storage – 16MB SPI flash Connectivity – WiFi 4 and Bluetooth 5 with LE/Mesh PCB antenna Storage – MicroSD card slot Connectivity 802.11 b/g/n WiFi 4 up to 150 Mbps and […]

Boardcon CM3588 Rockchip RK3588 System-on-Module designed for AI and IoT applications