This example shows how to create and destroy a file on a SD card. Please click here for more information on the SD library.

Source: Arduino – Files

IntroductionOTA (Over the Air) update is the process of loading the firmware to ESP module using Wi-Fi connection rather that a serial port. Such functionality became extremely useful in case of limited or no physical access to the module.OTA may be done using:Arduino IDEWeb BrowserHTTP ServerArduino IDE option is intended primarily for software development phase. The two other options would be more useful after deployment, to provide module with application updates manually with a web browser or automatically using a http server.In any case first firmware upload have to be done over a serial port. If OTA routines are correctly implemented in a sketch, then all subsequent uploads may be done over the air.There is no imposed security on OTA process from being hacked. It is up to developer to ensure that updates are allowed only from legitimate / trusted source. Once update is complete, module restarts and new code is executed. Developer should ensure that application running on module is shut down and restarted in a safe manner. Chapters below provide additional information regarding security and safety of OTA process.

Source: OTA Update · ESP8266 Arduino Core

Source: i2c – How to connect new OV7670 FIFO to Arduino? – Arduino Stack Exchange

http://forum.arduino.cc/index.php?topic=333334.0

https://en.m.wikipedia.org/wiki/Joseph_Marie_Jacquard

https://en.m.wikipedia.org/wiki/Charles_Babbage

This instruction is a quick translation for an instruction in Russian available at

http://privateblog.info/arduino-due-i-kamera-ov7670-primer-ispolzovaniya/

Connection of OV7670 to Arduino Due is easier than to Arduino Uno: lower operation voltage – only 3V, higher internal speed, more memory and more contacts on the board.

Source: How to Connect OV7670 to Arduino Due: 6 Steps (with Pictures)

Sometime ago I came across the Arducam Mini which is quite a nice camera module from UCTronics. It is a small PCB with a two megapixel OmniVision OV2640 sensor, an interchangeable lens and an FPGA to do the heavy lifting of image processing and JPEG encoding. Priced at around 24 Euros (lens included) you can easily buy a few without hurting your wallet and combined with an ESP8266 you can build quite a low cost wifi camera. Or several. Because designing and building PCBs is both fun and inexpensive I designed a board to go with the ESP8266/Arducam Mini combo, aptly named the Esparducam. And uniquely named too, try googeling for “esparducam“. Heck, even the domain name is available at the time of writing 

Source: Building a low cost wifi camera – Johan Kanflo

ArduCAM now released a world smallest low cost ESP8266 WIFI IoT camera kit based on ArduCAM-Mini-2MP-V2 and ArduCAM-ESP8266-Nano module. User can implement a 2MP WIFI camera using HTTP or Websocket protocol on ESP8266, and the camera can be acted as an AP and mobile phone/PC can connect to the camera directly or acted as a Station which connected to the home router. The kit can capture 2MP full resolution JPEG still image, even stream low resolution at fairly frame rate video over network or directly save to local SD/TF card. The kit is suitable for portable application, it can be powered from micro-USB or using battery and has build in lithium battery charging circuits. The kit can also be used separately, it is almost identical to standard alone ArduCAM-Mini-2MP camera and ESP8266-12F module. Continue reading “World Smallest ESP8266 WIFI Camera” »

Source: ESP8266 WIFI Camera | Arduino Based Camera

You could try

sox audiofile.wv audiofile.flac.

Alternatively, you could use the wavpack tools:

wvunpack audiofile.wv -o - | flac - -o audiofile.flac

Note that wiill not copy over any metadata; you’ll need to do that separately.

Source: audio – How to convert WavPack to FLAC? – Unix & Linux Stack Exchange

https://hit-mob.com/forums/viewtopic.php?f=3&t=5715