Lilygo TTGO T-Watch-2020 is a thin, ESP32 smartwatch programmable with Arduino that was introduced last year. The WiFi and Bluetooth-connected watch is equipped with a 1.54-inch LCD capacitive touch screen, a Class-D amplifier, buzzer, accelerometer, RTC, and a battery. The watch is one of the top-selling devices on Lilygo’s Aliexpress store, and they must have had requirements for voice control, so the company has now launched TTGO T-Watch-2020 V3 based on the same design but adding a PDM microphone. As far as I can TTGO T-Watch-2020 V3 specifications are the same as last year’s model, except for the microphone: SoC – Espressif ESP32 dual-core wireless processor with 520KB SRAM System Memory – 8MB PSRAM Storage – 16MB QSPI flash Display – 1.54-inch LCD capacitive touch screen Audio – Max98357 Class-D amplifier, buzzer/speaker, PDM microphone Connectivity – 802.11b/g/n WiFi 4 and Bluetooth 4.x/5.1 via ESP32 Sensors – BMA423 three-axis accelerometer with built-in step counting algorithm, activity recognition/tracking, advanced gesture recognition. Misc […]
FOSDEM is an open-source developer event that takes place on the first week-end of February every year in Brussels, Belgium. Every year except this year, as due to COVID-19 restrictions, FOSDEM 2021 will take place online like most events these days. The schedule has been up for some time, and today I’ll look at some of the interesting talks mostly from the Embedded, Mobile and Automotive “virtual devroom” but also other tracks. Saturday, February 6, 2021 13:00 – 14:00 – From Reset Vector to Kernel – Navigating the ARM Matryoshka Long gone are the times of executing the OS in-place from memory-mapped flash upon reset. A modern SoC now comes with complex mask ROM firmware, with driver, filesystem, protocol and crypto support for loading… yet another bootloader. In his talk, Ahmad follows this chain of bootloaders until the kernel is started, stopping along the way for RAM setup, peripherial initialization, runtime services and other interesting sights. Getting acquainted with the […]
We’ve previously seen programmable, portable game consoles powered by Espressif Systems ESP32 processor with the likes of ODROID-GO or WiFiBoy32 both equipped with a 2.4-inch display, and design to play retro games or create IoT projects with a small display thanks to I/O headers. But if for some reason, you’d like an even more compact ESP32 portable game console based on the WiFi & Bluetooth SoC, Byte-Mix Labs microByte may be what you are looking for thanks to a tiny 1.3-inch square display. microByte specifications: Wireless module – ESP32-WROVER-E module with ESP32 dual-core processor @ 240 MHz, 8 MB PSRAM, 16 MB flash, and integrated Wi-Fi and Bluetooth antenna Storage – MIcroSD card slot Display – 1.3-inch ST7789 IPS Screen with 240 x 240 pixel resolution, 60 Hz max refresh frequency Audio – On-board speaker powered by a MAX98357AETE+T I2S amplifier Controls – 13x onboard buttons with 8x Inductive direction and action buttons with rubber membranes, 3x additional buttons (Start, […]
The Internet of Things has many applications including smart agriculture . A few months ago, I talked to a local shrimp farm owner who used Arduino and ESP8266 boards to monitor water and activate pumps only when needed to get shrimps healthy and save on his electricity bill. He built his own solutions, but there are also companies offering easy-to-use smart farming solutions such as Malaysia-based Wondernica’s Agromon “interface wireless transmitter” designed specifically for smart agriculture applications. Agromon has two variants with support for 2 sensors (WR-AGRO-2S) or 3 sensors (WR-AGRO-3S) that share the following specifications: Connectivity – WiFi, Sigfox (RCZ 2/4), LoRaWAN, NB-IoT Sensor Interface – Modbus RS485 (analog input / 4-20mA / 12V-14V output) Power Supply – 12V DC (tolerance up to 14V); supports batteries, solar power, or power adapter Power Consumption – Sleep Mode: 3 mW Dimensions – 130 x 90 x 40mm Ingress Protection – IP67 Agromon transmitter is powered by an an ESP32-WROOM-32 WiFi (and […]
MicroMod is a modular interface ecosystem for quick embedded development and prototyping. MicroMod comes with two components, that is a microcontroller “processor board” and a carrier board. PC industry’s M.2 connector is the interface between these two components. The carrier boards are for the usage of various peripherals and the processor board act as the brain of the application system. MicroMod processor board has a dimension of 22×22 mm that can be easily fitted on the carrier boards. Although, the original M.2 standard was dedicated to swapping out peripherals where a user could swap one component with the other one. The MicroMod standard is for swapping out microcontrollers according to the functional and application requirements. MicroMod Processor Boards Artemis Processor Board comes with an Ambiq Apollo 3 Blue Arm Cortex-M4F with BLE 5.0 running up to 96MHz and a power rating of less than 5mW. It also supports the TensorFlow Lite framework. ESP32 Processor Board comes with a dual-core Tensilica […]
Yesterday, I wrote about Linksys AXE8400 WiFi 6E router which the company claimed was the world’s first, but it was pointed out to me that Xiaomi Mi AX6000 router was outed a few days earlier, and is even available right now in China or, while the Linksys router is scheduled to launch in spring or summer. Another big difference is the price with the Xiaomi router offered for 599 CNY (about $92) while the Qualcomm Networking Pro 1210 based Linksys router will sell for $450. That can partially be explained by the speed for WiFi (6000 Mbps vs 8000 Mbps), and Ethernet (2.5 Gbps WAN vs 5 Gbps WAN), but the Xiaomi router should still offer decent performance. Another reason for the cheaper price, as pointed by some smart people on OpenWrt forums is that the Xiaomi router goes not support 6 GHz, so it’s NOT a WiFi 6E router as initially advertised, and the company now refers to it […]
WiFi 6E is a new standard using the 6 GHz unlicensed spectrum to expand the bandwidth available for Wi-Fi. We previously covered some embedded boards with optional WiFI 6E cards, but so far, we had not seen any consumer-grade WiFi 6E routers. This about to change, as Linksys unveiled the AXE8400 WiFi 6E router at CES 2021, which the company claims is the world’s first WiFi 6E router. The router is based on Qualcomm Networking Pro 1200 SoC and can achieve up to 8400 Mbps speed. The company has done a poor job providing details about the router, but here are what the Linksys AXE8400 router specifications should look like: SoC – Qualcomm Networking Pro 1210 quad-core Cortex A53 processor with WiFi 6E, WiFi 5, WiFi 4 connectivity System Memory – TBD DDR3 or DDR4 Storage – TBD Connectivity 1x 5Gbps Ethernet (WAN) 4x Gigabit Ethernet ports (LAN) Tri-band WiFi 6Ghz WiFi 6E with 14x 80MHz channels and 7x 160MHz […]
There are plenty of WiFi modules for the IoT market, but those usually work at 2.4 GHz only. This may be an issue in areas where the 2.4 GHz spectrum is overcrowded. But two years ago, we were pleased to see the Ameba Z2 board offering dual-band (2.4GHz and 5Ghz) WiFi thanks to Realtek RTL8720CM wireless MCU, and last year, we discovered B&T BW16 dual-band IoT module based on RTL8720DN sold for under $4 before shipping. If you like the cheap price of the module, but do not feel like creating your own baseboard, or soldering wires to the module, you’ll be glad to know Rtlduino RTL8720DN board offers an easy way to evaluate RTL8720DN dual-band WiFi (and Bluetooth LE 5.0) microcontroller as it is fitted with a B&T BW16 module and comes in a form factor similar to NodeMCU ESP8266 board. Rtlduino RTL8720DN board Specifications: B&T BW16 wireless module Wireless SoC – Realtek RTL8720DN MCU with KM4 Arm Cortex-M4 […]
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