Tag Archives: wireless

Building a low cost wifi camera

via Dangerous Prototypes


Johan Kanflo designed a Esparducam board and built a low cost wifi camera with an Arducam Mini and a ESP8266 Wifi module:

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 :)

More details at Johan Kanflo’s blog.

Project files are available on Github.

ESP8266 mains energy monitor

via Dangerous Prototypes


A ESP8266 mains energy monitor project by Brian Dorey:

 As the new solar logger did not have this functionality we decided to design a new data-logger that would measure not only the mains current usage but also keep track of the electric meter and gas meter so we can easily see how much energy we are using in the house.
The new mains energy monitor was designed to be a standalone box that would be powered from the mains and have sensors for the mains current, electric meter and gas meter. As we didn’t want to run any more wires around the house we also decided to make it wireless connecting to our network over Wi-Fi.

Project info at Brian Dorey’s blog.

Fobble, a general purpose wireless breakout board

via Dangerous Prototypes


Ken Boak  has been working on a general purpose wireless breakout board – Fobble:

As can be seen from the above picture it contains a number of key features:

  • A resident RFduino  Bluetooth Low Energy Module with ARM Cortex M0 processor
  • 2 layer pcb 50 x 50 mm format- with extended Arduino headers pin-out
  • An X-Bee footprint – with 0.1″ breakout headers – to add your own wireless module
  • Two push button switches – only 1 populated shown
  • Footprint for RGB 0505 LED
  • Detachable power and programmer section
  • Detachable side panels – to make 38 x 32 mm BLE Key Fob
  • 8 pin header to accept 1.3″ OLED display
  • 20mm coin cell or flat Li Po cell power – on rear of Fob pcb
  • Micro – USB connector for recharging Li Po
  • Side Prototyping areas – perforated in 0.1″ matrix
  • 7 pin and 5 pin headers to accept any RFduino accessory shields – for development work

Project info at Sustainable Suburbia blog.

Using #Twatch as ICelsius wireless bbq thermometer monitor

via Dangerous Prototypes


Daniel use the #twatch as a monitor for his ICelsius wireless thermometer:

Finally I found a purpose for my twatch.
I use it as a monitor for my iclesius wireless thermometer.
So I wrote a quick and dirty python script which works as a relay between the icelsius and the twatch.
The icelsius periodically broadcast the measure data to the local network.
The python script listen to the local network and capture this packet ,and then transform the packet to a format which the twatch understand.

Via the forum.

Reverse engineering the ESP8266 WIFI-to-Serial port adapter

via Dangerous Prototypes

Here’s a video from electronupdate on reverse engineering the ESP8266 WIFI-to-Serial port adapter:

Another very interesting bit of technology. The combination of so much functionality into such a small part is a real touch-stone as to where things are heading.
A quick look at the antenna design to see if I could sort down the details and then some die-decap to analyze the silicon a bit. The RF section is especially interesting. In the video I call out a section as being an inductor… on second thought as I type this it might even be a transformer?

More details at electronupdate blog.