Turning Phone on and off with F-Bus

[kennethkearney]

I'm a bit confused with the operation of the phones. I have a PIC micro talking to a nokia 6150 and what I want to do is to turn the phone on and off but still have control over it. I see from gnokii protocols that when you request a phone status, in the 'mode' field there is an option 4: phone powered off.

0x04: Phone Status
s Phone status { 0x0001 }
r Phone status { 0x0002, mode, signal str, ???, pwr, batt.level }
where mode: 1: registered within the network
2: call in progress
3: waiting for pin
4: powered off
pwr: 1: AC/DC
2: battery


This leads me to believe that the phone can talk to the PIC even when the GSM bit is turned off. To turn the phone on and off, I plan to use the 'button press' routines.

Can anybody tell me if this is right or am I reading this all wrong?

[wumpus]

I'm quite sure this is not possible. The MBus/FBus logic and serial clock is powered down to save battery when the phone is turned off.

There are a few methods to turn it on, but a *BUS command is not one of them;
- engage btemp line (can be done externally on a lot of phones)
- pressed poweron button
- battery low
- charger connected
- ccont timer interrupt

[capotixplus]

BTEMP simulator is better option if you want your phone always ON, and then switch externally the DC voltage source with your PIC board.

Other, is to attach some digital switch or gate to the phone power button. Other way, you can reset (hard) your phone with *BUS commands, but not power on, since the phone clock isn't working.

If you see something like the phone is OFF with some software for flashing or unblocking, maybe the software turns-off display and keyboard during the process.