Espressif Category - Page 101 of 103 - CNX Software

May 3, 2016May 7, 2016 by Jean-Luc Aufranc (CNXSoft) - 8 Comments

Arduino UNO WiFi Board Combines Atmel ATmega328P MCU with ESP8266 SoC

Arduino.org (Arduino Srl) has launched Arduino UNO WiFi board, bringing Arduino (Atmel ATMega328P MCU) and ESP8266 together, and adding WiFi to the popular Arduino UNO board, while keeping all existing interfaces and headers. Arduino UNO WiFi (A000133) board specifications: Arduino part MCU – Atmel ATmega328 8-bit AVR MCU @ 16 MHz with 32 KB flash Memory, 2KB SRAM, 1KB EEPROM Digital I/O pins – 14, with 6 PWM and UART Analog Input Pins – 6 DC Current per I/0 – 40 mA Misc – Reset button Operating Voltage – 5 V ESP8266 part SoC – Expressif ESP8266EX Tensilica Xtensa LX106 processor @ 80 MHz Storage – 4MB SPI flash Connectivity – 802.11 b/g/n WiFi @ 2.4 GHz, wake up time < 2 ms; Antenna: PCB and IPX Misc – Bootloader button, WiFi LED Operating Voltage – 3.3 V Common specs USB – 1x USB device port Input Voltage – 5-12 […]

May 2, 2016August 29, 2018 by Jean-Luc Aufranc (CNXSoft) - 5 Comments

Electrodragon WiFi IoT Relay Includes ESP8266 Module, AC Power, and Enclosure for $6

Thanks to ESP8266, the cost of WiFi relays has dramatically come down, but so far, I could not find an all-in-one solution with ESP8266, relay, AC power and enclosure, and for example I’m still using NodeMCU board, a relay board, a USB power supply, and put all that into a plastic jar in order to control a water pump. It works but it’s not ideal, and solutions like Wemos D1 mini with relay shield improves things further, but Electrodragon has come with a connect-and-play WiFi IoT relay that integrates everything including the case for $6 + shipping. Wifi IoT Relay Board Based on ESP8266: WiFi module – ESP-12F based on Espressif ESP8266EX WiSoC Relays – 2x Songle SRD-05VDC-SL-C relays supporting 125VAC/10A, 250VAC/10A, 30VDC/10A, 28VDC/10A Input/Output – 3x terminal blocks for relay and power Expansion – 12-pin header with Rx/Tx, GPIO4, Btn2, GPIO15, 5V/GND, ADC, GPIO5, Btn1, OUTPUT1, and 3V3 Debugging […]

March 28, 2016March 28, 2016 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

Learn How to Build Your Own Open Source Hardware ESP8266 Smartwatch

ESP8266 might be the cheapest WiFi SoC for IoT application available, but it’s not really renowned for its power efficiency, and is often not considered the best choice for battery powered applications. This has not stopped Jeifa from developing a WiFi smartwatch based on the chip, and the 250 mAh battery used in the design is said to be good enough for 1 or 2 days of operation on a charge. Main components of Jeija’s ESP8266 smartwatch: SoC – Espressif ESP8266 with 32Mbit of flash memory Display – SSD1306 OLED Display, 128×64 resolution Connectivity – 802.11 b/g/n WiFi (via ESP8266) Sensor – Invensense MPU-9250 gyroscope, accelerometer, and compass Debugging / Programming – FT232RQ for USB communication Misc RV-3029-C2 Real Time Clock with alarm function, and temperature sensor 3x user buttons Vibration Motor Power 250mAh LiPo battery MCP73831 LiPo charger Dimensions – 35 x 39 x 11mm (board) He designed the […]

March 25, 2016September 8, 2021 by Jean-Luc Aufranc (CNXSoft) - 22 Comments

ESP8266 and ESP32 Differences in One Single Table

Espressif Systems ESP8266 is a very popular platform for IoT applications relying on WiFi, at least for hobbyists, while Espressif ESP32 is the new solution from the company that adds a CPU core, faster WiFi, Bluetooth 4.2, and various I/Os which should launch very soon. Amica.io released a table showing the main differences between the two processors which are expected to coexist in the market with ESP8266 used in the lower-cost segment, and ESP32 in applications requiring WiFi and Bluetooth, or some of the new interfaces. Some of the features were clearly listed when ESP32 was first announced, but for example, I was not aware that an Ethernet MAC, and a temperature sensor were built into the new SoC. Other interesting features for the new ESP32 processor include a touch sensor, and hardware PWM both of which are missing in ESP8266. The new dual-core processor also builds on existing features, […]

March 22, 2016August 7, 2016 by Jean-Luc Aufranc (CNXSoft) - 12 Comments

Getting Started with Wemos D1 mini ESP8266 Board, DHT & Relay Shields

Wemos D1 mini is an ESP8266 board that’s interesting thanks to its size, its low price ($4), micro USB power, its shields, and a documentation that looks fairly good. The board can be programmed with Arduino or Lua, and supports both serial and OTA programming. I’ve decided to give it a try and bought the board together with two temperature shields, a relay shield, and micro SD shield. I got all for $ 14.00 from Wemos Aliexpress shop, and it took about one month for delivery. I can also see they’ve recently released a new OLED shield selling for about $5. All shields were shipped inside their own anti-static bags. The pins are clearly marked on both side of the board and the shields. One side of the board features ESP8266 module. and the other side has CH340 serial to USB chip, and the reset button. The provided headers make […]

March 7, 2016March 8, 2016 by Jean-Luc Aufranc (CNXSoft) - 48 Comments

MXQ 4K Rockchip RK3229 Android TV Box Unboxing and Teardown

MXQ 4K TV box list of features is rather impressive, as the 4K media player packs support for high bitrate (200 Mbps+) 10-bit H.265 and H.264, as well as VP9 at 4K resolution, 4 USB ports, Ethernet, and HDMI 2.0 for just $30. That price includes shipping. We just don’t know how it performs, but we’ll soon find out as GeekBuying sent me a sample for review. I’ll start by checking out the hardware, before testing it over a few days, and write a complete review. MXQ 4K Unboxing The retail package shows MXQ-4K “OTT TV Box” and some of the key selling points like Kodi support, 4K, HEVC/H.265, and son on. You’ll also find the Android 4.4 Kitkat logo since strangely Rockchip did not provide an Android 5.x SDK for their low cost processor. The device ships with an IR remote control, a 5V/2A power supply, an HDMI cable, […]

February 19, 2016February 19, 2016 by Jean-Luc Aufranc (CNXSoft) - 6 Comments

$4 Wemos D1 mini ESP8266 Board Supports Shields with a Temperature Sensor, a Button, a Relay, or a micro SD slot

Wemos D1 board, a $9 ESP8266 board in Arduino UNO form factor, now has a little brother with Wemos D1 mini. The board looks somewhat similar to NodeMCU with breadboard friendly I/Os on the sides and a micro USB port for power and programming, but what could make it more interesting, beside the $4 price tag, is that the company also developed several shields (aka add-on boards). Wemos D1 mini specifications: WiFi 802.11 b/g/n module based on ESP8266EX with 4MB flash Expansion – Through holes with 11x digital input/output pins (3.3V) supporting interrupt/PWM/I2C/one-wire (except D0) 1x analog input (3.3V max input) Reset and power signals (5V, 3.3V, GND) USB – micro USB port Misc – Reset button Power – 5V via micro USB or 5V pin Dimensions – 34.2 x 25.6 mm Weight – 10 grams The board is said to be compatible with Arduino IDE and NodeMCU firmware. ESP8266 […]

February 8, 2016February 8, 2016 by Jean-Luc Aufranc (CNXSoft) - 8 Comments

You Can Now Connect ESP8266 Module to Your Color Television (Sort of)

You can do lots of things with ESP8266 WiFi modules, but CNLohr did something rather unexpected as he managed to use GPIO3/RX pin to broadcast NTSC signals first in black & white, and now in color, to his television’s channel 3. On the hardware side, he did have to disconnect the WiFi antenna, and connected a wire antenna to GPIO3/RX pin. He then set I2S to run at 80 Mbps, and pushed data out using DMA buffers, so he could achieved the 61.25 MHz frequency required for NTSC luminance data, and the color data, 3.579MHz higher up. Once the demo is running, you can alter it on the fly using a web neat interface. This is all explained on channel3’s github repository, as well as one a 15-minute video showing the capabilities and limitations, and explaining how you can play around with the parameters. Via ESP8266COM’s Tweet. Jean-Luc Aufranc (CNXSoft)Jean-Luc […]