Arduino Glasses a HMD for Multimeter

I finaly can recieve all the data from my Owon B35T multimeter, on my data glasses.

This Weekend I designed a new body for my glasses and I finally ordered a 3d Printer.
Now I have to adapt this Sketchup in 123D Design

I can now charge the Glasses over the charging board, or transferring data to the Arduino pro micro, but I have to switch between the two micro USB ports. I decided to add a Micro USB breakout board to have just one part, where I can program the Arduino, and in same time charge the Arduino Glass.

It took me a few days to analyse the Data coming from my Bluetooth Multimeter Owon B35T.

After I understood most of the values, I wrote a little program to transfer the Data directly to my Arduino Glass. Amazing, connecting to measuring points, and seeing the Data directly in front of where you are working.

I've worked a little bit on the software. I configured the Hm11 as central and I let the module search for BT4.0 devices. After a few try's I made it work. I used a simple written Arduino program to send the serial, Bluetooth data to the USB and vice versa. Now I receive the data from my external device.

This program can be found on my Github (serialtest3.ino)

void setup() {

Serial.begin(9600); // opens serial port, sets data rate to 9600 bps

Serial1.begin(9600); // opens serial port 1, sets data rate to 9600 bps

}

void loop() {

if (Serial1.available())

Serial.write(Serial1.read()); //read data from Bluetooth and send it to USB

if (Serial.available())

Serial1.write(Serial.read()); //read data from USB and send it to Bluetooth

}

And again optic. I found this website to calculate the object distance.
http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/image4.html
The best optics for this project are lenses with a focal length between 100mm and 120mm.
The Maginifiging effect will be between 2.9x and 3.5x, witch gave the best results and the distance between the lens and the display will be something between 70mm and 80mm.

Yesterday I wrote a little program to test the Data transmission to the Arduino glasses.
On the mobile with min. Android 4.3 I use now this terminal software: HM BLE Terminal.
I made this quick video to demonstrate. Link to the video

Ok, I found the time to connect the Bluetooth 4.0 module. Looks good, and the current for the whole thing is about 24mA. Will take more when I start to transmitt data, but I think on the 330mAh LiPo it will run for min. 10 Hours

Now that the optic part works, let's go over to the electronic part.

Here a little schematic of my prototype. The only thing that is not implemented yet is the Bluetooth module (maybe this weekend)

Here is the build of my Prototype 4. This one has a lens with a FL of 120mm and a LiPo Accu.

It's build again out of cardboard. The bluetooth modul will be added soon