STM CircleOS forum / Primer2 GSM Modem

peterwrigley · 2009-02-24 15:35:06

Hi guys,

If you were to put the battery voltage directly onto the external connector instead of V_ext, you could hook up a GSM / GPRS modem and you'd have something pretty useful ... after all, all the handshaking is present for a full USART implementation and a couple of other lines could provide the other control signals.

Cheers
Peter

Francis · 2009-02-24 17:49:56

We output Vcc=2.8V (with about 100mA available).

sjoerd · 2009-02-25 07:10:27

You can connect the Primer1 or 2 to any GSM / GPRS / UMTS phone using the UART.
Then use standard AT commands (over UART) to control the phone (http://www.traud.de/gsm/index.html)

Advantage of a regular cellphone is that it has it's own battery.

Francis · 2009-02-25 08:58:58

Note that the battery voltage is available... at the jumper. You could easily use it as a connector for a small cable that will port the switch on your target board (and you could there derivate the power for your application). That's quite easy!

FR4 · 2009-02-25 11:49:17

Is this connection to the batteryjumper also allowed in this years contest?

Francis · 2009-02-25 12:57:05

Is this connection to the batteryjumper also allowed in this years contest?

Yes. The jumper and the connector exist. It's not a modification of the hardware.
Francis

# 1 2009-02-24 15:35:06 Primer2 GSM Modem

Primer2 GSM Modem

# 2 2009-02-24 17:49:56 Primer2 GSM Modem

Re: Primer2 GSM Modem

# 3 2009-02-25 07:10:27 Primer2 GSM Modem

Re: Primer2 GSM Modem

# 4 2009-02-25 08:58:58 Primer2 GSM Modem

Re: Primer2 GSM Modem

# 5 2009-02-25 11:49:17 Primer2 GSM Modem

Re: Primer2 GSM Modem

# 6 2009-02-25 12:57:05 Primer2 GSM Modem

Re: Primer2 GSM Modem

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