I have been trying to come up with a way to integrate a Mobile Phone into my CAR-PC.
Some of the problems with a standard mobile phone:
1: Hard to find which Phones can take AT commands via an USB or Serial link AND if so, do they implement the full command set.
2: Having to modify the phone to fit an aerial socket if no external connection was provided and having to modify power control, audio etc as the Phone should never have to be touched again, it’s just a module in the CAR-PC case.
Why do I want this?
I have my Car PC fully integrated into the vehicle. I want full control over the Phone software and I want things like:
1: Auto switching to the Phone Menu on an incoming call with Phone number displayed along with the caller name if they are in the Phone Book and all in easy to read info on my 8” screen
2: Option for Spoken Name of the Incoming caller if they are in the Phone Book.
3: Option to auto answer only calls in the Phone Book which resides on the Car PC.
4: Auto muting of the Radio, GPS and Music Player along with Pausing of the Music player etc when an incoming call is detected.
5: Auto return to the Previous CAR-PC Menu state on disconnect along with and full resume of all Audio sources, un-paused players etc.
6: Answer or Make calls manually using Steering Wheel controls or my Centre console FE-Drive control panel.
7: Signal strength indication.
8: Last 10 Phone calls received and last 10 SMS Message numbers received.
9: Big screen viewing of SMS messages with Simple control for sending them.
10: Being able to have the Vehicle send and SMS alert if the alarm is tripped and have it send GPS data to an FTP server as it’s moving, both Independent of the CAR-PC running.
11: Has to cost under $90
12: Because I want to.
I found this module 2 weeks ago. It has Microphone and Line out connection. A 12v power connector and in this case a serial connection, I will mod to USB however I believe USB units are available from other sources. Cost me $76.00
Supports Voice, SMS, Data/Fax, GPRS and has an integrated TCP/IP stack.
Single-IC: AMR926EJ-S core
GPRS Class 10/8
Quad-Band 850/ 900/ 1800/ 1900 MHz
GPRS multi-slot class 10/8
GPRS mobile station class B
Compliant to GSM phase 2/2+
Class 4 (2 W @850/ 900 MHz)
Class 1 (1 W @ 1800/1900MHz)
Control via AT commands (GSM 07.07, 07.05 and SIMCOM enhanced AT Commands)
Low power consumption: 1.5mA (sleep mode)
Operation temperature: -40 °C to +85 °C
I have spent the past week or so writing the software and have it all working. Some pictures of the Phone Software to follow.