esp8266 News - Page 20 of 21 - CNX Software

October 29, 2015March 13, 2016 by Jean-Luc Aufranc (CNXSoft) - 26 Comments

Getting Started with NodeMCU Board Powered by ESP8266 WiSoC

Since ESP8266 is now so popular, I’ve recently bought a NodeMCU board to try it. I selected this board because the latest version of the board is breadboard-friendly, integrates a USB to serial chip, and it can be powered by a simple USB to micro USB cable. I also noticed a ESP8266 tutorial with NodeMCU firmware by SwitchDoc Labs the other day (using ESP-12 and Adafruit Huzzah), which I applied to my NodeMCU board, but since I encountered a few issues, I decided to report my findings, and write my own little getting started guide to switch on/off LED and GPIOs using a web interface. NodeMCU v0.9 and NodeMCU v1.0 If you are going to purchase a NodeMCU board it’s important to know there are two official versions: NodeMCU v0.9 with ESP-12 module NodeMCU v1.0 with ESP-12E module The main complain about NodeMCU v0.9 is that while it fits on […]

October 21, 2015 by Jean-Luc Aufranc (CNXSoft) - 8 Comments

$9 ESP8266 D1 Board Features Arduino UNO Headers

We’ve already seen the Arduino IDE supports ESP8266(-EX) WiFi SoC, and some companies have designed Arduino shields for ESP8266 modules, but so far I had never seen an ESP8266 board with Arduino UNO form factor supporting Arduino shields, and that’s exactly what showed up in DX new arrivals RSS feed with a white label ESP-12E UNO board selling for $11.75 including shipping. The “D1” board has the following specifications: ESP8622 Module – AI-Thinker ESP12-E module (as found in NodeMCU) based on ESP8266-EX SoC @ 80 or 160 MHz with 4MB flash Connectivity – 802.11 b/g/n with PCB antenna. Supports station / softAP / SoftAP + station modes, WPA/WPA2 security. I/Os 11x Digital I/O pins 1x Analog Input pin I/O logic level: 3.3V ADC pin (A0) input voltage: 0-3.3V Debugging – Via micro USB using CH340G USB-TTL serial chip Misc – Reset button Power Supply – 6-24VDC via DC jack, 5V via […]

October 21, 2015October 21, 2015 by Jean-Luc Aufranc (CNXSoft) - 7 Comments

How to Use an ESP8266 Board as a WiFi to Serial Debug Board

Telnet and SSH are great to access a Linux device, machine and computer remotely when they are already running, but when you are working on the bootloader and/or kernel themselves, you’ll have to use a serial port to access the terminal / serial console. Boards used to get an RS232 port which you connected to your computer with a NULL modem cable, but these days, most boards and devices expose TTL signals and require a USB to TTL debug board to access the console via a USB cable. If you only have one device close to you computer that’s fine, but if your testbed is a little further. or you need to access the serial console on multiple boards you could consider using ESP8266 module to export the terminal over WiFi. This is exactly what Zoobab did above with a GL.inet router running OpenWRT and NodeMCU board with ESP-12(E) module […]

August 31, 2015 by Jean-Luc Aufranc (CNXSoft) - 6 Comments

TESPA Hawk IoT Board Combines ESP8266 with STM32 MCU in an Arduino Nano Form Factor (Crowdfunding)

TESPA Hawk is an IoT board designed by three companies based in Thailand and Singapore: Deaware delivers the embedded software for the board, Gravitech handles hardware design and manufacturing, and MakerAsia provides the IoT cloud platform. At first glance, it looks like yet another board based on the popular ESP8266 WiSoC, but it also includes an STM32 micro-controller, and its pinout is the same as Arduino Nano. There are also various add-on boards (WINGs) to easily and quickly prototype IoT projects. TESPA Hawk specifications: WiSoC – Espressif ESP8266 @ 80MHz with 8MB Flash MCU – ST Micro STM32F042G6 ARM Cortex-M0 MCU @ 48MHz with 32KByte Flash, 6KB SRAM Connectivity – WiFI 802.11 b/g/n/ with on-board antenna and u.FL socket for external antenna USB – micro USB port for power and programming Expansion – 2x 16-pin headers (mostly) compatible Arduino Nano pinout including 5-channel full range 3.3V ADC (4x 12-bit, 1x 10-bit), […]

June 15, 2015June 16, 2015 by Jean-Luc Aufranc (CNXSoft) - 31 Comments

IoT Wi-Fi Modules Comparison Table – ESP8266 vs CC3000 vs RN131 vs HDG204

We now have several options to add WiFi to IoT / embedded projects at relatively low cost, and ESP8266 based solutions clearly wins on costs, but are there some advantages to other higher priced modules? To help us find out, Mike Barela has put up a comparison table with some Wi-FI modules based on Espressif ESP8266, Texas Instruments CC3000, Microchip RN131, and H&D Wireless HDG204 processors. Note 1 – Also comes in Arduino Shield size with SD card slot for $39.95 Note 2 & 3 – Adafruit and Sparkfun sell tested units with AT Firmware for $6.95. lower prices are available on eBay, but quality may vary. Note 4 – Currents are probably somewhat higher than stock ESP-12 due to onboard LED and regulator. The comparison is not exhaustive, but it still appears to show ESP8266 solutions support most features than pricer competing modules. There are however case where competing […]

May 29, 2015May 28, 2015 by Jean-Luc Aufranc (CNXSoft) - 7 Comments

ESP8266 SDK 1.1.0 is Now Released Under an MIT License

ESP8266 is the now famous dirt-cheap Wi-Fi SoC used for IoT applications. It can be used by hobbyists and companies alike. But for the later, there was a licensing issue as Espressif ESP8266 SDK was initially released under the GPLv3 license. GPL code is great and lots of open source projects are released under the most common open source license. But since proprietary, closed source software has still its place in the market place, some other more permissive licenses such as LGPL are used for library, and Android for example has an Apache License 2.0. So previously, if you developed an application using ESP8266 SDK, you’re code would have to be GPL too, since the license is viral. It would also cause issues if you had released your application under an Apache or MIT license. But now, all is well, as Espressif released ESP8266 SDK 1.10 under an MIT license, […]

April 25, 2015April 25, 2015 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

$10 Digistump Oak ESP8266EX Board is Arduino Compatible, Connects to the Cloud, and More (Crowdfunding)

A few years ago, I wondered why adding Wi-Fi to Arduino had to be rather expensive ($40+), and why there weren’t any low cost and small form factor Wi-Fi boards for embedded applications. But we’re now in 2015, embedded is “dead” giving rise to IoT, and I’m left wondering how it’s possible to make IoT Wi-Fi modules that cheap, and whether people will ever stop churning out cheap Wi-Fi boards, as I’m flooded with such news weekly… So when I saw yet another ESP8266 board on Kickstarter I was about to dismiss it, but since it was made by Digistump, that has an active community with their other products like DigiSpark Pro or DigiX, I decided to have a closer look. Digistump Oak hardware specifications: MCU – Espressif ESP8266EX 32-bit microprocessor @ 80MHz (overclockable up to 160MHz) with 1MB ROM (~300KB available for user code), 64KB RAM, 512 bytes EEPROM […]

April 18, 2015April 18, 2015 by Jean-Luc Aufranc (CNXSoft) - 15 Comments

NodeMCU is both a Breadboard-Friendly ESP8266 Wi-Fi Board and a LUA based Firmware

NodeMCU is a LUA based interactive firmware for Expressif ESP8622 Wi-Fi SoC, as well as an open source hardware board that contrary to the $3 ESP8266 Wi-Fi modules includes a CP2102 TTL to USB chip for programming and debugging, is breadboard-friendly, and can simply be powered via its micro USB port. Let’s checkout the hardware first. The latest version of the board (V1.0) has the following specifications and features: Wi-Fi Module – ESP-12E module similar to ESP-12 module but with 6 extra GPIOs. USB – micro USB port for power, programming and debugging Headers – 2x 2.54mm 15-pin header with access to GPIOs, SPI, UART, ADC, and power pins Misc – Reset and Flash buttons Power – 5V via micro USB port Dimensions – 49 x 24.5 x 13mm The hardware documentation for the board can be found on nodemcu-devkit repo, including schematics and PCB layout designed with Altium Designer, […]