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May 14, 2025May 21, 2025

M5Stack Tab5 Review – Part 1: Unboxing, teardown, and first try of the ESP32-P4 and ESP32-C6 5-inch IoT devkit

I’ve just received a review sample of the M5Stack Tab5 ESP32-P4 IoT development kit, which looks like a small tablet with a 5-inch touchscreen display, a 2MP front-facing camera, an ESP32-C6 WiFi 6, Bluetooth, and 802.15.4 wireless module, and various expansion interfaces. Today, I’ll go through an unboxing, a (partial) teardown, and have a quick try with the default firmware and GUI, before checking out how to program the device in the second part of the review. M5Stack Tab5 unboxing I received the Tab5 in its retail package along with an M5Stack-branded transparent sticky tape roll. Not sure why, but thanks M5Stack, sticky tape is always useful, so appreciated! The bottom side of the package has all the key features and specifications that we already covered in our article about the Tab5. The package contains the Tab5 itself, a 2,000mAh/14.8Wh battery, and a cable with six wires for the ExtPort2 […]

May 9, 2025May 9, 2025

M5Stack Tab5 is a tablet-like ESP32-P4 IoT development kit with a 5-inch touchscreen display and front-facing camera

The M5Stack Tab5 may look like a small tablet, but it’s an ESP32-P4 IoT development kit with a 5-inch touchscreen display, a 2MP front-facing camera, an ESP32-C6 WiFi 6, Bluetooth, and 802.15.4 wireless module, and a range of interfaces. Those include USB Type-A and Type-C ports, an RS485 interface, a STAMP pad to connect an LTE Cat M/NB-IoT or LoRaWAN module, and expansion connectors including a Grove module, a 30-pin M5Bus header, and a GPIO_EXT connector. The Tab5 is also equipped with a built-in speaker and dual-microphone array, and the ESP32-P4 development kit is powered by a removable battery with charging support. M5Stack Tab5 specifications: Microcontroller – Espressif Systems ESP32-P4NRW32 CPU Dual-core 32-bit RISC-V HP (High-performance) CPU @ up to 400 MHz with AI instructions extension and single-precision FPU Single-RISC-V LP (Low-power) MCU core @ up to 40 MHz with 8KB of zero-wait TCM RAM Memory 768 KB HP L2MEM […]

MiniLink IIoT Node – An Arduino compatible RS485 to LoRaWAN node with wireless expansion

Designed by Thailand-based Saijai Tech, MiniLink IIoT Node is an Arduino compatible board based on either an ESP32 WiFi & Bluetooth SoC or an unnamed Microchip Cortex-M0+ microcontroller designed for Smart Agriculture or industrial applications (e.g. PLC controllers). The board includes an RS485 interface for sensors or actuators, an ACER-branded LoRa module, and expansion headers to add an extra wireless module with either LoRa PtP (P2P, Point-to-Point), NB-IoT, or 3G/4G LTE & GNSS, and some of those add an extra RS485 port. MiniLink IIoT node key features & specifications: MCU (one or the other) Espressif ESP32 dual-core processor with 2.4 GHz WiFi and Bluetooth LE Microchip Arm Cortex-M0+ microcontroller (probably SAMD21) LPWAN – ACER AS923 LoRaWAN module Sensor interface – RS485 or UART via terminal block (jumper selectable) Expansion – 2x 14-pin header for expansion modules Misc – User & reset buttons, RS485/UART selection jumpers, user and power LEDs, USB/TTL […]

May 25, 2026June 11, 2026

CardputerZero – A Raspberry Pi CM0 pocket computer for makers (Crowdfunding)

CardputerZero is a pocket-sized computer based on the Raspberry Pi Compute Module Zero (CM0) and designed for makers with a 46-key matrix keyboard, a 1.9-inch LCD, HDMI video output, Fast Ethernet, three USB ports, a microphone and a speaker for voice interaction, a 14-pin GPIO header, a Grove interface, and an IR transceiver (Rx/Tx). The credit card-sized device comes in two models: CardputerZero Lite and CardputerZero. The latter also adds an 8MP camera, a 6-axis IMU, and a 32GB microSD card preloaded with the software. Both models are powered by a rechargeable 1,500 mAh LiPo battery or directly via a USB-C port. Cardputer Zero specifications: SoM – Raspberry Pi CM0 Lite SoC – Broadcom BCM2710A1 CPU – Quad-core Cortex-A53 processor @ 1.0 GHz GPU – VideoCore IV GPU supporting OpenGL ES 1.1, 2.0 graphics VPU – H.264/MPEG-4 1080p30 video decoding, H.264 1080p30 video encoding System Memory – 512MB LPDDR2 RAM Storage […]

April 13, 2026April 14, 2026

Trail Mate open-source firmware leverages Meshtastic and MeshCore for ESP32 off-grid handhelds

vicliu624’s Trail Mate is an open-source firmware for off-grid communication and GPS coordinates sharing, leveraging the Meshtastic, MeshCore, and other projects, and designed for ESP32 handhelds such as LILYGO’s T-LoRa Pager or M5Stack’s Tab5 with a LoRaWAN module. The Trail Mate firmware provides a fixed north-up GPS map, direct LoRa text messaging through Meshtastic or MeshCore mesh networks without relying on a smartphone, and prioritizes stability, efficiency, and interoperability over feature density. Trail Mate user interface highlights: Simple main menu with four icons: GPS, LoRa chat, tracker, and system utilities. GPS map Fixed North-Up map orientation (no rotation) Fully offline map rendering from SD card tiles (png/jpg files) Three switchable base layers: OSM / Terrain / Satellite Optional contour overlay for terrain shape awareness Real-time position marker for the current GPS fix Discrete zoom levels optimized for embedded systems Simple breadcrumb trails for path awareness Fast in-page layer switching via […]

February 9, 2026February 10, 2026

Add a tiny desktop monitor to your PC with the ESP32 Desktop Monitor project

While searching AliExpress for new products, I found the TENSTAR T-Display ESP32-D0WD with a 1.14-inch IPS color IPS LCD and 16MB of QSPI flash that’s used by some as a tiny secondary mirrored monitor for their PC. The board appears to be a low-cost alternative to the original LilyGo T-Display, and also integrates a USB-to-TTL converter (CH9102F), a battery charging circuit, a toggle switch, and two user-programmable buttons, which makes it suitable for projects like the NerdMiner and small-scale dashboards for home automation. The hardware does not seem special, yet they sold over 10,000 pieces of the board. After looking into it, the ESP32 Desktop Monitor project is probably the “culprit” for the high sales number, as it transforms the board into a regular monitor, albeit with a tiny 1.14-inch LCD. More on that after the specifications. TENSTAR T-Display Specifications: SoC – Espressif Systems ESP32-D0WDQ6-V3 MCU cores – Dual-core Xtensa LX6 32-bit […]

January 17, 2026March 20, 2026

Tablet-like, ESP32-P4-based 7, 8, and 10.1-inch HMI displays integrate Wi-Fi 6 connectivity, 5MP camera

Waveshare has recently released the ESP32-P4-WIFI6-Touch-LCD, a family of tablet-like, fully enclosed HMI display development boards built around the ESP32-P4 SoC. The company offers 7-inch, 8-inch, or 10.1-inch configurations, all designed for industrial HMI, smart home terminals, and edge AI applications. Since the ESP32-P4 does not include built-in wireless connectivity, Waveshare has integrated an ESP32-C6-MINI module for WiFi 6 and Bluetooth 5 (LE) support. The board also leverages the ESP32-P4’s peripherals for MIPI CSI/DSI interfaces, a 5MP camera, and various I/Os, including USB 2.0 OTG and USB-to-UART Type-C ports, an SDIO 3.0 microSD card slot, dual microphones with echo cancellation, a speaker driven by an onboard audio codec, GPIO expansion headers, and optional battery support. Waveshare ESP32-P4-WIFI6-Touch-LCD specifications: Wireless module – ESP32-P4-Core SoC – Espressif Systems ESP32-P4NRW32 CPU Dual-core 32-bit RISC-V HP (High-performance) CPU @ up to 400 MHz with AI instructions extension and single-precision FPU Single-RISC-V LP (Low-power) MCU core […]

November 11, 2025December 31, 2025

Giveaway Week 2025 winners announced!

CNX Software’s Giveaway Week 2025 has just ended and we’ve now ready to announce the winners. We offered some of the review samples we tested, and three companies joined us offering new samples, namely Banana Pi with two router boards, VOIPAC with an industrial development kit, and RAKwireless offered two of their IoT development kits for the fifth year running. Besides the aforementioned prize, we also included an ESP32-P4 development kit, a dry switch from SONOFF, a Raspberry Pi CM4-based HMI with a 915MHz LoRa module, a 5-inch Raspberry Pi Touch Display, and two USB PD voltage indicators on both CNX Software “International” and CNX Software Thailand. You can see all prizes shown below. Without further ado, here are the seven winners of Giveaway Week 2025 on CNX Software (English): M5Stack M5Tab – Ed Elecrow Pi Terminal – Tom Banana Pi BPI-R4 Lite router board – Stef 5-inch Raspberry Pi […]