$7 Sonoff D1 Smart Dimmer Switch Supports Mobile App, RF433 Remote, and Voice Assistants

Sonoff D1 Smart Dimmer Switch & RF433 Remote

ITEAD Studio Sonoff is a family of WiFi or/and 433 MHz RF connected smart home switches, sockets, light bulbs or other products for home automation. They are usually based on ESP8266 WiSoC and while the pre-loaded firmware works with eWelink Android/iOS app and popular voice assistant, it’s also possible to load open-source firmware such as Sonoff-Tasmota or ESPurna to add MQTT and other protocols in order to integrate those with home automation solution such as Domoticz, or something control those from your web browser. The company has now launched another Sonoff device, namely Sonoff D1 smart dimmer switch which – as its name implies – will allow you to dim incandescent and dimmable LED lights. Sonoff D1 smart dimmer switch specifications: Connectivity – RF433 and 802.11b/g/n WiFi 4 Max Current – 1A Max Power – 400W for Incandescent lamp, and 150W for LED light Power Supply – 110V-230V AC input & output Mechanical Dimensions – 62 x 47 x 32.5 …

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Raspberry Pi 4 WiFi Fails When Setting HDMI to 2560×1440 Resolution

Raspberry Pi 4 WiFi Fail 2560x1440 Resolution

Enrico Zini was working on a digital signage solution based on Raspberry Pi 4, then he set the video output to 2560×1440, and all hell broke loose. And by that, I mean WiFi stopped working. It was not obvious at first but after a full day of debugging, trying both micro HDMI outputs, different HDMI cables, three different Raspberry Pi boards, different power adapters, Raspbian Buster and Buster Lite, different MicroSD cards… He could reproduce the problem in all conditions, all he needed to do was to set the resolution to 2560×1440, and WiFi would just stop working. Setting the resolution to 2048×1080 or lower, and all WiFi connectivity issues disappeared. He did not test at higher resolutions, and another user reported a similar problem happening at 2.4 GHz, but not at 5 GHz, albeit when setting HDMI output to 1920×1080. So it looks like interference, but as noted by some it’s also surprising because the HDMI port and the …

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esp32MX-E ESP32 Board Comes with Ethernet and USB-C Ports (Crowdfunding)

ESP32 Ethernet & USB-C Board

We’ve already covered several ESP32 boards with Ethernet including Olimex ESP32-GATEWAY and Silicognition wESP32, and I’ve just noticed Espressif also made its own with ESP32-Ethernet-Kit. Modtronix Engineering has another take with esp32MX-E board that beside Ethernet also exposes a USB-C port, a MicroSD card slot, and also adds an STM32F0 microcontroller acting as an I2C I/O expander. esp32MX-E specifications: Wireless Module ESP32 dual-core LX6 microprocessor at 160 or 240 MHz, 4 MB Flash, 520 KB SRAM Wi-Fi 4 802.11 b/g/n Bluetooth 4.2 BR/EDR & BLE Storage – MicroSD card slot USB – USB Type-C connector for programming, power, and Virtual COM port Expansion via 14-pin and 20-pin female headers 22x I/O pins of which 4 are inputs only. 4x 5 V tolerant I/O pins Not all I/Os are available when the SD Card is used Programmable pull-up and pull-down resistors on most inputs Secondary MCU – I²C I/O expander implemented with a user-programmable STM32F030F4 Misc – User LED, button Power …

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Rikomagic R6 Mini Projector Review – Part 2: Android 7.1

Rikomagic R6 Android Projector Review

We’ve already quickly checked out Rikomagic R6 mini projector in the first part of the review with an unboxing and first boot,  but now I’ve had more time to play with the device, so I’ll report about my experience. Android Launcher and Default Apps Here’s the launcher pre-installed in the projector. Media Center The Media Center app allows you to display images, play audio files as well as videos. It will show thumbnails of images present in the current folder… and as soon as you select one image in the folder it will start a slideshow with classic music playing the background. You’ll be able to see what it looks like in the video at the end of this review. Happy Cast It’s an app in Chinese, that apparently allows you to cast from other Chinese apps, but I have not used it. WiFi Display WiFi Display will be one of the most useful app, as it allows you to …

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Giveaway Week – Particle Mesh IoT Development Kit

Particle Mesh IoT Developer Kit

In early 2018, Particle introduced three nRF52840 Bluetooth 5 boards, also supporting the company’s Particle Mesh technology, and selling for as low as $9. Later that year, the company send me what they call Particle Mesh IoT development kit with several of those boards to get started with their mesh networking solution. That’s what I’m offering as the 6th prize of this giveaway week. With this kit on hand, I wrote a Particle Mesh networking getting started guide showing how to configure the board in Particle.io dashboard, and easily push a new program to multiple Xenon Bluetooth 5 + Mesh boards using an Argon WiFi & Bluetooth 5 + Mesh as the gateway. I’ll give away the full kit shown in the top picture which includes: The Argon kit (ESP32 WiFi + Bluetooth + Mesh) A Grove and Particle Sensor Kit with various modules and a shield An Adafruit Featherwing OLED display and headers Three Xenon (Bluetooth + Mesh) nodes …

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HLK-7688A OpenWrt Development Board Comes with an Audio Jack

HLK-7688A Development Board

We first tested MediaTek MT7688 MIPS processor in Mediatek Labs’ LinkIt Smart 7688 / 7688 Duo hardware development kits running OpenWrt in 2015 with the boards having a focus on IoT applications. A year later, Widora NEO board launched with an audio jack for connected audio applications, but AFAIK it’s not available anymore. There’s now another OpenWrt audio board based on the processor with HLK-7688A board featuring Hi-Link HLK-7688A module which we previously found in MatchBox LoRaWAN gateway. HLK-7688A board specifications: Wireless Module – HLK-7688A based on MediaTek MT7688 MIPS24KEc processor @ 580 MHz, and equipped with 128MB RAM, 32MB flash Storage – MicroSD card slot Connectivity 802.11 b/g/n WiFi 4 up to 150 Mbps with u.FL antenna connector 10/100M Ethernet Audio – 3.5mm audio jack; 4-pin speaker header, WM8960 audio codec USB – 2x Micro USB ports one USB 2.0 port and one for debugging & power Expansion – 2x 26-pin headers with GPIO’s, SPI, UART, I2C, I2S, Ethernet, …

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Khadas VIM3L SBC Review with Android 9 Firmware

Khadas VIM3L Android Review

Khadas VIM3L is the first and so far only Amlogic S905D3 SBC on the market, so I first ran some benchmarks and checked system info. But it is also designed to be an HTPC, I’ll continue the review with some 4K video and audio playback testing, some gaming, and I/O benchmarks. Khadas VIM3L Unboxing As you may remember (or not), VIM3L ships either as a bare board pre-loaded with Android 9 or as an HTPC kit with the board running CoreELEC. I’ve received the bare board which also comes with two WiFi antennas. It can do much more than a simple TV box however, since it also comes with an M.2 NVMe socket (extra adapter board required), and sockets with MIPI DSI + touchscreen, and MIPI CSI camera. It’s one of the few boards with a low profile Ethernet connector, so if you ever wanted to build a farm of the board it could lead to a more compact solution. …

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Imagination iEW220 Low Power Dual-band 802.11n WiFi IP Solution Targets IoT, Automation and Wearables

Imagination-low-power dual-band WiFi IP solution

Imagination Technologies is better known for their PowetVR GPUs and as the previous owner of MIPS technology, but they do have other products as well and the company just announced their second generation 802.11n WiFi IP designed for low power applications Ensigma iEW220 is an IEEE 802.11a/b/g/n 1X1 SISO Wi-Fi IP solution comprised of RF, baseband and MAC, and supporting both 2.4GHz and 5GHz spectrum. iEW220 specifications: RF Features Dual-band 2.4 and 5 GHz RF including PA Power efficient AGC Optimized PLL power consumption Customized PA to minimize Tx power consumption Power optimized DAC/ADC design Integrated transmit/receive switch for RF Single pin RF antenna interface IEEE 802.11 PHY Support (2.4/5 GHz) IEEE 802.11b DSSS/CCK (up to 11 Mbps) IEEE 802.11a/g OFDM (up to 54 Mbps) IEEE 802.11n OFDM MCS 0-7, (20/40 MHz channels, up to 72.2/150 Mbps) Station, soft AP and Wi-Fi direct with up to four associated devices Tx power up to 19 dBm and Rx sensitivity up to …

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