Mobile phone to act as RF frequency sesnor and detector

Winston Ojenge wojenge at
Fri Apr 20 07:10:21 UTC 2012

Hi Andreas,
Much appreciation. I have to do it as long as it's possible. Thanks.
Will update forum on my results progress.

On 4/19/12, Andreas Eversberg <andreas at> wrote:
> hi ojenge,
> you need to perform two steps:
> 1. you need to alter the neighbour cell measurement task in
> mobile/gsm322.c, so it will not measure neighbour cells in idle mode,
> but measure whatever you like. you can define up to 32 frequencies.
> after you've received the results, you can keep them, change them or
> change them back to start over, until you have measured the full range
> you want. you must give <ARFCN> + ARFCN_UPLINK in order to measure other
> phones.
> 2. as you have a complete set of frequencies you wanted to scan, you
> need to generate an sms with these results.
> note that you cannot sync nor read any messages from the surrounding
> phones with the neighbour cell measurement task. you just get the rx
> level of what passes through the filters.
> also note that the current code will only run on a host, so you need a
> laptop/netbook/embedded hardware to use the c123 with osmocombb.
> i suggest start reading the gsm322.c, it does most of the idle process.
> regards,
> andreas

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