Myna Posted April 29, 2014 Share Posted April 29, 2014 Here’s my latest DIY project, a smartphone based on a Raspberry Pi. It’s called – wait for it – the PiPhone. It makes use an Adafruit touchscreen interface and a Sim900 GSM/GPRS module to make phone calls. It’s more of a proof of concept to see what could be done with a relatively small form factor with off-the-shelf (cheap) components. I don’t expect everyone to be rushing out to build this one, but I had great fun in doing it, as it builds quite nicely on my previous projects, especially the Lapse Pi, a touchscreen time-lapse controller, and uses most of the same hardware.What makes this different from the Timelapse controller is the addition of a a SIM900 GSM module, which is connected via UART to the Raspberry Pi. Also, I got myself a LiPo battery that would fit nicely between the TFT screen and the Raspberry Pi, so it could be used standalone, without any wires hanging off it whatsoever. Here’s the finished PiPhone.Also shown in the above pic is the touchscreen interface I developed for the purpose of this project. It’s a numeric keypad, with a display of the number to dial at the top, and a phone icon at the bottom to make or hang up the call.Here’s a demo of the PiPhone in action. Once we turn the unit over, we can see the main communications module, which is a Sim900 GSM/GPRS module. This allow us to send standard AT commands to it to make calls, hang up, send texts, data etc. Overall a very clever module. Towards the bottom of the white PCB, you can see the SIM Card, which allows the module to associate with my local GSM network, and it’s using a regular prepaid SIM card, bought in my local phone store for €10. Below the GSM module, you can see the on.off switch and a DC-DC converter, which converts the 3.7volts from the LiPoly battery to 5volts needed by everything else. The DC-DC converter is from eBay from a UK seller. It was ore expensive than I’d like to have paid, but It was the last piece of the puzzle, and I didn’t want to wait the typical 3 weeks from China.Read the full article @ http://www.davidhunt.ie/piphone-a-raspberry-pi-based-smartphone/ Link to comment Share on other sites More sharing options...
Arizin Posted April 30, 2014 Share Posted April 30, 2014 Wow! Nice tech. Adafruit is a peripheral to Raspberry Pi,right? Link to comment Share on other sites More sharing options...
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