DSTIKE ESP32 Watch Development Board Comes with OLED or TFT Display

DSTIKE ESP32 Watch Development Kit

In recent months several Espressif ESP32 watches have started to show up including TTGO-T wristband and Watchy with an e-Ink display. This morning, I’ve come across another option with DSTIKE ESP32 watch development kit that offers a choice of black & white OLED display or color TFT display, and has apparently been around for about a year. DSTIKE ESP32 watch devkit specifications: SoC – ESP32 dual-core Tensilica LX6 processor with Wi-Fi 4 and Bluetooth 5.0/5.1 connectivity Storage – MicroSD card Display (one or the other) 1.3 OLED I2C display (SH1106) TFT color display with 240 x 240 resolution (I2C + 2 I/O) Expansion – 10-pin header with TX/RX, GPIO 17 & 16 (I2C), SVP/SVN, GPIO 25 & 26 (DAC), GND, and 3V Misc – Power switch, navigation buttons, reset & flash buttons, buzzer, WS2812b RGB LED,  “highlight LED” (backlight LED maybe), charging status LED Battery – 600 mAh battery Dimensions – Face: 4.5 x 3.8 x 1.5cm Weight – TBD …

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M5Stack ATOM is a Compact, Fully Integrated ESP32 Development Kit

M5Stack ATOM Lite

When working on a project you may need an MCU or MCU board, an external display, a breadboard, and other accessories like sensors and jumper cables. It does the job, but it can be messy. Recently, we wrote about M5Stack M5StickV AI camera, but the company is better known for its ESP32 IoT development kits enabling neater project thanks to hardware that integrates MCU, I/O headers, display, and sensors into an enclosure. Their latest offerings are ATOM series toolkits that come in two versions: ATOM Lite and ATOM Matrix. Let’s have a look at both. M5Stack ATOM Lite Specifications: SiP – ESP32-PICO-D4 system-in-package with ESP32 dual-core processor with WiFi 4 and Bluetooth 5.0/5.1 Storage – 4 MB flash Crystal oscillator and passive components USB – 1x USB Type-C port Expansion 9-pin header with 6 GPIOs compatible with jumper cables 4-pin PH2.0 connector with 2x GPIO, 5V and GND Misc – Reset button, user button, RGB LED, IR LED Dimensions – …

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ESP32-S2 WiFi SoC Sells for $1, ESP32-S2-WROOM & ESP32-S2-WROVER Modules for $2 and Up

ESP32-S2-WROOM & ESP32-S2-WROVER

Espressif Systems ESP32-S2 was announced in May 2019, before the release of the datasheet and first internal development boards a few months later.  Mass production was delayed due to COVID-19, but earlier this month we reported ESP32-S2 mass production had started and the company has a new ESP32-S2-Kaluga-1 multimedia development board in the works. So it was just a question of time before the processor, modules, and boards become available. Unexpected Maker recently got a development kit with ESP32-S2 final silicon, so I thought maybe I could find ESP32-S2 hardware on Aliexpress. I had no luck finding modules or boards at this time, but one seller is currently selling ESP32-S2 for just $1 per piece, but the trick is that you’d have to purchase 2,000. It’s also about the same price on Digikey. As a reminder, ESP32-S2 SoC is based on a single Xtensa LX7 core clocked at 240 MHz, supports Wi-Fi HT40 @ 2.4 GHz, and provides up to …

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Know the Differences between Raspberry Pi, Arduino, and ESP8266/ESP32

Raspberry Pi vs Arduino vs ESP8266 / ESP32

CNXSoft: This is a guest post written in collaboration with SurfShark. When it comes to choosing a platform for STEM education or hobbyist projects, there are a number of low-cost, compact maker boards on the market. The most popular include the kid-friendly Raspberry Pi SBC that was designed with children in mind, Arduino boards for electronics projects, and more recently boards and modules based on EspressifESP8266 and ESP32 wireless SoC’s. In this post, we’ll look at the use cases and strong points for each of the boards whether you are just dabbling in the hobby of coding and DIY electronics, or you have a commercial project. Raspberry Pi The Raspberry Pi is a lineup of single-board computers (SBCs) that are from the UK and were first introduced in February 2012. These small computers were initially designed to teach students the basics of computer science, but they’ve found their way into various projects including commercial products. To the uninitiated, the Raspberry …

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Radiona ULX3S Open Source Hardware ECP5 FPGA Development Board Launched for $99 and Up (Crowdfunding)

ULX3S Lattice ECP5 FPGA Educational Board

Last summer, we wrote about Radiona ULX3S education board combining a Lattice Semi ECP5 FPGA with an Espressif Systems ESP32 WiFi & Bluetooth WiSoC. Designed for a digital logic course at the University of Zagreb, the board is open-source hardware with KiCAD hardware design files released on GitHub, and programmable with the Arduino IDE (FPGArduino) and ProjectTrellis open-source toolchain. At the time, there was only a version based on Lattice ECP5 85F with 84K LUT, but they’ve now made versions with cheaper variants of ECP5 FPGA and launched the board on Crowd Supply. Radiona ULX3S specifications: FPGA (one of the other) Lattice ECP5 LFE5U-85F-6BG381C with 84K LUT Lattice ECP5 LFE5U-45F-6BG381C with 44K LUT Lattice ECP5 LFE5U-12F-6BG381C with 12K LUT System Memory – 32MB SDRAM @ 166 MHz Storage – 4–16MB Quad-SPI Flash for FPGA config and user data storage; MicroSD slot Audio – 3.5 mm jack with 4 contacts (analog stereo + digital audio or composite video) Video – Digital …

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$5 Sinilink WiFI USB Power Switch Works with Tasmota Firmware, Supports up to 20V/5A

Sinilink WIFI USB Power Switch

Late last year, ITEAD launched Sonoff Micro WiFi USB switch that allows you to turn on and off USB powered devices over WiFi using eWelink app for Android or iOS. It integrates with Amazon Alexas and Google Home, and does the job, but people who like to use the open-source Tasmota firmware will be disappointed to learn it’s not based on ESP8266 processor hence not compatible. Luckily, there’s another option: Sinilink WiFi USB switch (aka XY-WFUSB) based on ESP8266 WiFi SoC, and supporting up to 20V/5A according to the manufacturer. It is currently sold for under $5 including shipping on Aliexpress. Sinilink XY-WFUSB specifications: WiSoC – Espressif ESP8266 processor with 802.11b/g/n WiFi 4 USB Input – USB type-A female port supporting 3.5V to 20V up to 5A (100 Watts max) USB Output – USB type-A male port up to 100W Misc On/off button – Pressing 5 seconds also change the pairing mode between AP mode and “touch mode” LEDs – …

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Meshtastic Mesh Networking Project Combines ESP32, LoRa and GPS Radio

ESP32 GPS LoRa

Meshtastic is a project using off-the-shelf, inexpensive ESP32-based hardware with GPS & LoRa connectivity to create mesh networks helping hikers. skiers, paragliders, or people exercising other outdoor activities communicate short messages such as their GPS location. This allows each member of a private mesh network to see the location and distance of all other members and read/or any text messages sent to a group chat. No phone is required unless you have an ESP32 LoRa board without GPS in which case it would get the GPS coordinates from your phone over Bluetooth. A phone is also needed to send a message. The project currently works on three different boards TTGO T-Beam, TTGO LORA32 and Heltec LoRa 32. The T-Beam is recommended as it sells for around $26 plus shipping and features a 18650 battery holder so you can source the battery easily locally. Just make sure to purchase the right frequency 433 MHz, 865 MHz, 915 MHz or 923 MHz …

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$55 Watchy Smartwatch Combines ESP32 WiFi & Bluetooth SoC with E-ink Display

Watchy ESP32 E-ink Smartwatch

SQFMI has designed a (mostly) open-source hardware smartwatch based on an ESP32-S wireless module for WiFI and Bluetooth connectivity, and equipped with an E-ink display of 200×200 resolution. Watchy also comes with a BMA423 accelerometer, four buttons, a DS3231 real-time clock, and a vibration motor. The watch should last around 2 weeks on a charge. I mentioned the watch is “mostly” open source hardware because while the GERBER files, bill of materials (BoM) and the PDF schematics have been released on Github, the KiCAD schematics and PCB layout files have not so far. That still means you can understand the design, repair the design, or even make your own, but if you intended in modifying the design, you’d have some more work to do. Tom Fleet, writing for Hackster.io, does go through different sections of the schematics and explain what they do. One the software side, the watch can be programmed with MicroPython or Arduino, and the Arduino library, as …

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