Espressif Category - Page 96 of 96 - CNX Software

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, […]

May 5, 2015May 5, 2015 by Jean-Luc Aufranc (CNXSoft) - 15 Comments

Espressif WROOM WiFi ESP8266 Modules are FCC and CE Certified

Espressif, the company behind ESP8266 (EX) Wi-Fi chip for IoT applications, has now opened store on Taobao, where they sell WROOM-02 and WROOM-02 modules based on ESP8266EX with FCC, CE, TELEC, and SRRC certifications. WROOM-01 has some soldered headers that make it easier to use for hobbyists and prototyping, while WROOM-02 is more compact, and should be more suitable to include in your own products. But otherwise, they share about the same specifications: SoC – Espressif Systems ESP8266EX 32-bit RISC processor @ 80 MHz with integrated WiFi Wi-Fi – 802.11 b/g/n with STA/AP/STA+AP operation modes Header – 2x 18-pin headers with SDIO 2.0, GPIOs, SPI, UART, GND and 3.3V pins Dimensions – 11.5mm x 11.5mm Temperature Range – -40C ~ 125C Certifications – FCC, CE, TELEC, and SRRC The company can also provide “hardware reference design, antenna design, and SDK for secondary development”, but you’re likely to find most of […]

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 […]