Pandauino 644/1284 Narrow are Compact ATmega644/1284 Arduino Boards (Crowdfunding)

Pandauino 644 Narrow and 1284 Narrow boards powered by Microchip ATmega644 and ATmega1284 8-bit AVR MCU in a compact form factor slightly larger than the official Arduino Nano. The Pandaunino boards also come with up to eight times more RAM, more flash, as well as ten extra digital I/Os compared to Arduino Nano while keeping software compatibility. Pandauino 644/1284 Narrow boards specifications: MCU 644 Narrow – Microchip ATmega644 8-bit AVR microcontroller with 64KB flash, 4KB SRAM, 2KB EEPROM 1284 Narrow – Microchip ATmega1284 8-bit AVR microcontroller with 128KB flash, 16KB SRAM, 4KB EEPROM USB – 1x Micro USB port for power and programming I/Os – 24x digital I/Os including up to 8x PWM (6x max for 644 Narrow), 8x analog I/Os, 1x SPI, 2x USART, 1x I2C Power Supply – 5V input with on-board 5V and 3.3V regulators. Max current – USB: 500 mA limited by a PTC. Vin: 800 mA @ 6.2 V, 25°C Current consumption – 35 mA …

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ESP32 Board Features mini PCIe & SIM Card Sockets for 4G LTE Connectivity

LilyGO has launched yet another ESP32 WiFi & Bluetooth IoT board. As its name implies, TTGO-T-PCIe board includes a mini PCIe socket that coupled with a SIM card socket allowing users to insert a 4G LTE mPCIe card to add cellular connectivity. The company also offers optional SIM7000 2G or SIM7600 4G LTE modems that come with LTE and GPS antennas. You should probably be able to add other cellular mini PCiE, as well as other wireless mPCIe modems for LoRa, Satellite communication, etc… (Finally most probably not) TTGO-T-PCIe board specifications: Wireless module – ESP32-WROVER-B with ESP32 dual-core wireless SoC with 520KB SRAM, WiFi and Bluetooth with on-board antenna, as well as 4MB flash, and 8MB PSRAM Connectivity 802.11 b/g/n WiFi 4 up to 150 Mbps (ESP32) Bluetooth 5.1 LE (ESP32) Optional wireless cards via mPCIe socket (I2C and UART), SIM card slot for 2G and 4G LTE cellular networking USB – 1x USB-C port, 1x 4-pin USB header Expansion …

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TTGO T-Internet-POE Board Provides Ethernet, PoE, WiFi, Bluetooth for $16

We’ve written about several ESP32 POE boards in the past including wESP32, but there’s now another one with LilyGO TTGO T-Internet-POE board offering Fast Ethernet, PoE,  as well as WiFI and Bluetooth connectivity through ESP32-WROVER-B module. TTGO T-Internet-POE specifications: Wireless Module – ESP32-WROVER-B with ESP32 dual-core WiSoC, 4MB flash, 8MB PSRAM Storage – MicroSD card socket Connectivity 2.4 GHz 802.11b/g/n WiFi 4 and Bluetooth 5.1 via ESP32 10/100M Ethernet via LAN8720A Ethernet PHY Expansion – Unpopulated I/O header with UART, SPI, I2C, PWM, I2S, ADC; 3.3V I/O voltage Debugging / Programming Serial port via USB-C port and CP2104 USB to TTL chip (TBC) 6-pin programming interface with Tx/Rx, IO0, Reset, 3.3V and GND Misc – BOOT and reset buttons, 32.768MHz crystal oscillator Power Supply 5V via USB-C port up 50V PoE via Pulse PA2369NL transformer and HanRun HR861153C PoE compliant RJ45 jack SI3404 power management chip Dimensions – 70 x 52.3 x 17mm Weight – 26.85 grams Temperature range – …

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STM32 based Indoor Air Quality Sensor Connects to Raspberry Pi or Arduino (Crowdfunding)

Even before the COVID-19 lockdown, people spent most of their time indoors (around 90% according to some studies), so it’s important to monitor air quality and other metrics like light and sound levels in our homes, workplaces, schools, cars, etc… Metriful Sense indoor environment monitor does just that by reporting multiple metrics such as temperature, humidity, particle concentration, etc… over I2C to microcontroller or processor boards such as Arduino or Raspberry Pi. Sense hardware specifications: MCU – STMicro STM32G071KB Arm Cortex-M0+ microcontroller @ 64 MHz with 128 KB Flash, 36 KB SRAM Sensors Bosch Sensortec BME680 4-in-1 air quality sensor with relative humidity, barometric pressure, ambient temperature, and gas (VOC). Vishay VEML6030 ambient light sensor Knowles SPH0645LM4H-B MEMS microphone Optional – Shinyei PPD42 particle sensor unit I/Os – 10-pin unpopulated header with air particles sensor input, light and sound interrupt outputs, I2C, VPU pin for 3.3V/5V selection, GND, VDD, VIN and RDY (EEADY signal output) Supply Voltage – 3.3V (VDD) …

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M5Stack Atom Echo Coin-Sized Bluetooth Speaker is Powered by ESP32-PICO-D4 SiP

M5Stack has just launched Atom Echo, a coin-sized programmable Bluetooth speaker based on Espressif Systems ESP32-PICO-D4 system-on-package. The company sent me an early sample to play with before launch… but let’s have a look at the specification before checking the device further. Specifications: SiP – Espressif Systems ESP32-PICO-D4 system-in-package with ESP32 dual-core processor @ 240MHz Wi-Fi, BLE 4.0 and 4MB flash Audio 0.5W/NS4168 I2S speaker SPM1423 PDM microphone Expansion 5-pin + 4-pin headers with 6x GPIOs, UART, 5V, 3.3V, GND 4-pin digital Grove header with 2 I/Os, 5V and GND Misc – RGB LED (SK6812), Function (Top – G39 pin) and reset buttons (side), IR LED Power Supply – 5V/500mA via USB-C port Dimensions – 24 x 24 x 17mm (plastic material) Weight – 10 grams The Bluetooth speaker is really small, but you may think CNXSoft has big hands and fat fingers so it makes the speaker smaller than it’s really is, so I also a photo of the …

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Make PCB’s with a Modified Lexmark Laser Printer

PCB manufacturing services are pretty cheap and fast nowadays. But imagine some kind of highly transmissible virus hits the globe, somehow the whole global economy shuts down, and you are stuck alone at home with nothing but a Lexmark laser printer. What can you do? Well, you can make your own PCBs! No paper involved. That’s exactly what Vítor Barbosa did by converting a Lexmark E460(DN) laser printer into a PCB making machine, not because of COVID-19, but instead, because of the price and delays of ordering PCBs in Brazil. Using a laser printing to make your own PCB like take some work, notably to strip the printer of unused parts such as the fuser and fit it with Arduino Nano or Pro Mini board, an aluminum guide, some resistors and more. The modifications are all explained on Hackaday.io, and this is not a new idea as the project was derived from a 5-year project based on a Lexmark E260, …

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Cucumber ESP32-S2 Development Board Comes with USB OTG Port, Optional Sensors

Yesterday, I wrote about LilyGO TTGO ESP32-S2 WiFi IoT board, but one commenter mentioned it missed one of the key features of ESP32-S2 chip: a USB OTG port. While USB OTG  is accessible through the header pins, it’s not the most convenient to use. I also quickly mentioned Cucumber ESP32-S2 development board in that post, but I did not expand too much since I thought it should only ship within Thailand. But the board does include two USB Type-C ports, one for the usual USB UART connector, and the other for USB OTG, and I found out the board is available worldwide. The board is available in multiple variants with or without sensors and PSRAM, and with external IPEX antenna or PCB antenna using ESP32-S2-WROVER(-I) or ESP32-S2-WROOM(-I) module. Cucumber specifications: Wireless Module (one of the other): ESP32-S2-WROVER with ESP32-S2, 4MB flash, 2MB PSRAM, on-board PCB antenna ESP32-S2-WROVER-I with ESP32-S2, 4MB flash, 2MB PSRAM, IPEX / u.FL antenna ESP32-S2-WROOM with ESP32-S2, …

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TTGO ESP32-S2 WiFi IoT Board Comes with Optional MicroSD Card and Battery Support

All ESP32-S2 boards I’ve seen so far were from Espressif Systems themselves including ESP32-S2-Saola-1 and ESP32-S2-Kaluga-1, but LilyGO TTGO ESP32-S2 is the first third-party board for sale so far. The tiny board is somewhat similar to ESP32-S2-Saola-1 board and comes in two versions with a similar form factor, but a completely different pinout and the presence of a MicroSD card socket and a battery connector on one of the boards. The simpler board is called “ESP32-S2 ESP32-S-WOOR” and comes with ESP32-S2-WROOM module, while the one with more features is named “TTGO ESP32-S2 ESP32-S ” and features its own circuitry built around ESP32-S2 WiSoC. Both TTGO ESP32-S2 boards share many of the same specifications: SoC – Espressif Systems ESP32-S2 single-core 32-bit Tensilica LX7 processor with 320 kB SRAM, 128 kB ROM, System Memory – 8MB PSRAM Storage – 4MB flash; XY-ESP32-S only: MicroSD card socket Connectivity 2.4GHz 802.11b/g/n WiFi 4 connectivity Antenna XY-ESP32-S-WOOR: PCB antenna on module XY-ESP32-S: “3D” antenna USB …

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