Review of Elecrow’s 3.5-inch and 7.0-inch ESP32 display modules using Arduino programming

Using the ESP32 7.0-inch display as a dashboard

Hello, I’m excited to review the ESP32 display modules and HMI touchscreens from Elecrow with sizes ranging from 2.4 to 7.0 inches. For this review, Elecrow kindly provided me with both 3.5-inch and 7.0-inch models. While their screens differ in size, both modules share several components, such as the ESP32 microcontroller, making them adaptable options for a variety of projects. The Elecrow 7.0-inch display module is powered by the ESP32-S3-WROOM-1-N4R8 module equipped with an ESP32-S3 dual-core LX6 32-bit microprocessor, 4 MB of flash, 384 kB of ROM, and 512 kB of SRAM. This microcontroller supports both WiFi and Bluetooth for wireless communication. The 7.0-inch display itself is a capacitive touch screen with a resolution of 800×480 pixels. The display is controlled by the EK9716BD3/EK73002ACGB driver and is compatible with LVGL for additional functionality. In the case of the 3.5-inch display module, the main difference is the use of the ESP32-WROOM-32-N4 […]

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

ESP32 Smart PowerMeter

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 […]

Giveaway Week 2023 winners announced!

CNX Software Giveaway Week 2023 Prizes

CNX Software’s Giveaway Week 2023 is now over and we’re ready to announce the winners. We offered some of the review samples we tested (or not) in the last year, and like the last two years, we were also joined by RAKwireless who offered two IoT development kits. All items given away are shown in the photo below, minus some accessories, and if you count more than seven you’d be right, as some are kits with multiple items like the GL.iNet GL-S200 Thread Border router which comes with three development boards, and more importantly, we also organized Giveaway Week on CNX Software Thailand for the second year running. We had seven winners on CNX Software: VOIPAC iMX8M industrial development kit – Kraingsak, Thailand TBS7901 mini PCIe DVB-S2X/S2 module  – Frank, Singapore RAKWireless WisBlock IoT Starter Kit – Andy, Russia GL.iNet GL-S200 Thread Border router kit – Augustin, Argentina WCH CH583M-R0-1v1 […]

Review of CrowView 14-inch portable monitor with laptops and mini PCs

CrowView Display Laptop Mount Ubuntu

I received an early sample of the CrowView 14-inch laptop monitor for review a few weeks ago, and regular readers may have seen me already use it in some mini PC reviews, but I’ve yet to review the monitor itself, so I’ll report my experience using both laptops and mini PCs running Windows 11 and Ubuntu 22.04. CrowView laptop monitor unboxing The display ships in a retail package highlighting the main features of the display such as its Full HD resolution, compatibility with 13 to 16.5-inch laptop displays, 160° viewing angle, and its mechanical clamping mechanism. The CrowView display ships with a 12V/2A power supply, USB-A to USB-C and USB-C to USB-C cables, an HDMI to mini HDMI cable, a velcro tie, some stickers, and a user manual in English. The clamping mechanism can be found on the back of the display. There are also four buttons on the bottom […]

CrowView adds a 14-inch portable monitor to your laptop for $115 and up (Crowdfunding)

CrowView 14 inch laptop monitor extender

Elecrow CrowView is a lightweight 14-inch portable monitor designed to be attached to your laptop adding a secondary monitor to it through a clamping structure that works with laptops having a 13-inch to 16.5-inch display. We’ve seen this type of laptop monitor extension for years, and you’ll find various models on Amazon. But the Elecrow is now offering the CrowView at a significantly lower price than competitors especially if you pledge $114.90 for the super early bird reward on Kickstarter. The regular price ($179) can still be interesting as in this price range you’d usually get an 11-inch or 12-inch display. CrowView specifications: 14-inch IPS display with 1920×1080 resolution, 60 Hz refresh rate, 400 nit brightness Compatible with 13-inch to 16.5-inch laptops with 4 to 8mm thick displays thanks to a telescopic snap 230° hinge enabling face-to-face mode. Ports Mini HDMI port for video input 2x full-featured USB Type-C port […]

CrowVision review – An 11.6-inch 1366×768 touchscreen display that works with multiple SBCs

Raspberry Pi 4 CrowVision Touchscreen Display Tester

CrowVision is an 11.6-inch IPS capacitive touchscreen display with 1366×768 resolution that is designed to work not only with the Raspberry Pi but most single board computers with mounting holes within a 100 x 80 mm rectangle. Elecrow sent me a sample so I’ll try it out with a Raspberry Pi, a Windows 11 mini PC, and a Ubuntu 22.04 laptop to make sure it works well with those operating systems. CrowVision unboxing The packages include the display module itself, a 12V/2A power adapter, USB Type-C and micro USB cables, an HDMI to mini HDMI cable, a micro HDMI to mini HDMI cable, two “ribbons” for cable management, a screwdriver, an OSD control board with five keys, and a user manual. The display does not come with an enclosure, so it’s better suited for DIY projects where users design their own enclosure or mounting solution. The control board is based […]

Getting Started with CrowBot BOLT smart robot car

Elecrow CrowBot BOLT & Game Controller Assembled

CrowBot BOLT is a smart robot car based on an ESP32 wireless microcontroller and designed for the education market with the ability to program the robot with visual programming, Arduino, or MicroPython. Elecrow sent me a sample of the CrowBot BOLT kit for evaluation so I’ll have a look at the hardware, show how to assemble it, showcase the features of the built-in firmware, and demonstrate how to program the robot with visual programming, Arduino, and MicroPython using some of the provided code samples. CrowBot BOLT unboxing The package lists some of the highlights with 16 teaching courses, support for multiple programming platforms, scalability with Grove connectors, and the inclusion of the Joystick that’s also programmable. The CrowBot BOLT comes as a kit so there will need to be some work to do to assemble the robot, but no soldering is required (in normal cases, more on that later). The […]

CrowPi L Review – Part 2: Learn programming and electronics with a Raspberry Pi 4 laptop

CrowPi L review learn programming electronics

In the first part of our review of CrowPi L Raspberry Pi 4 laptop for education, we checked the hardware and accessories such as the CrowTail starter kit with various sensors and other electronics modules, and showed how to install or remove the Raspberry Pi 4 SBC from the laptop shell. I’ve now had more time to play with the educational software, so I’ll report my experience with the laptop when learning game design and hardware control with Letscode visual programming IDE, as well as the Python lessons for more advanced students. Reinstalling CrowPi OS image It’s the rainy season here in Thailand meaning it’s both hot and humid, and even though I’m not entirely sure it’s related, I recently had to reinstall Raspberry Pi OS on one of my Raspberry Pi with a corrupted SD card. It happened again with the CrowPi L after I left it in its […]

Memfault IoT and embedded debugging platform