Dear all, I lecture at strathmore university, Kenya, East Africa. For my PhD, i need to develop a cell-phone model that senses and recognizes a specific RF frequency from a source. It then submits the value of that frequency by SMS.
Is it possible to use the OsmocomBB platform to program such a device using motorola C123?
Ojenge
Dear all, I lecture at strathmore university, Kenya, East Africa. For my PhD, i need to develop a cell-phone model that senses and recognizes a specific RF frequency from a source. It then submits the value of that frequency by SMS.
Is it possible to use the OsmocomBB platform to program such a device using motorola C123?
Ojenge
On 4/16/12, Winston Ojenge wojenge@strathmore.edu wrote:
Dear all, I lecture at strathmore university, Kenya, East Africa. For my PhD, i need to develop a cell-phone model that senses and recognizes a specific RF frequency from a source. It then submits the value of that frequency by SMS.
Is it possible to use the OsmocomBB platform to program such a device using motorola C123?
Ojenge
Winston Ojenge wrote:
Dear all, I lecture at strathmore university, Kenya, East Africa. For my PhD, i need to develop a cell-phone model that senses and recognizes a specific RF frequency from a source. It then submits the value of that frequency by SMS.
Is it possible to use the OsmocomBB platform to program such a device using motorola C123?
Ojenge
On 4/16/12, Winston Ojengewojenge@strathmore.edu wrote:
Dear all, I lecture at strathmore university, Kenya, East Africa. For my PhD, i need to develop a cell-phone model that senses and recognizes a specific RF frequency from a source. It then submits the value of that frequency by SMS.
Is it possible to use the OsmocomBB platform to program such a device using motorola C123?
Ojenge
hi ojenge,
osmocombb supports sms. you can also "sense" RF frequence, but you need to add some feature to do measurement at the first plane and then send the sms with the results. c123 is capable of receiving GSM downlink frequencies only. you may also receive uplink and even (with modifications to the firmware) receive frequencies a bit outside GSM bands. in this case you need to replace filters or your signal level is reduced. the osmocombb firmware is capable of measuring rx levels of given frequencies while being idle on a gsm cell. what do you want to "sense"?
regards,
andreas
Hi Andreas, Is my line of interest irrelevant to the OsmocomBB project? In short, is the project intending to explore use of the phone for anything besides the conventional calling and conventional SMS. If you recall, my interest was to write code to enable the phone to 'sense' and detect signal from a remote source of few metres. I need to be able to write the code. Can i? I need a response desperately so that i stop cluttering the forum.
Ojenge
On 4/16/12, Andreas Eversberg andreas@eversberg.eu wrote:
Winston Ojenge wrote:
Dear all, I lecture at strathmore university, Kenya, East Africa. For my PhD, i need to develop a cell-phone model that senses and recognizes a specific RF frequency from a source. It then submits the value of that frequency by SMS.
Is it possible to use the OsmocomBB platform to program such a device using motorola C123?
Ojenge
On 4/16/12, Winston Ojengewojenge@strathmore.edu wrote:
Dear all, I lecture at strathmore university, Kenya, East Africa. For my PhD, i need to develop a cell-phone model that senses and recognizes a specific RF frequency from a source. It then submits the value of that frequency by SMS.
Is it possible to use the OsmocomBB platform to program such a device using motorola C123?
Ojenge
hi ojenge,
osmocombb supports sms. you can also "sense" RF frequence, but you need to add some feature to do measurement at the first plane and then send the sms with the results. c123 is capable of receiving GSM downlink frequencies only. you may also receive uplink and even (with modifications to the firmware) receive frequencies a bit outside GSM bands. in this case you need to replace filters or your signal level is reduced. the osmocombb firmware is capable of measuring rx levels of given frequencies while being idle on a gsm cell. what do you want to "sense"?
regards,
andreas
On 4/19/12, Winston Ojenge wojenge@strathmore.edu wrote:
Hi Andreas,
I need to develop a model that identifies human interaction. I need to identify the mobile phones that communicate next to a specific mobile phone consistently. it would show the acquintances of the owner of the specific mobile phone. The specific mobile phone should therefore be able to sense signals from the nearby phones. those phones which signals are always powerful must be next to it always. I need to harvest the received signal of the specific phone. The received signal must have been down-converted and digitized in order to be accessible to a program that i design. The program would detect the identity of the nearby phones and send an SMS to a control centre for analysis. the c123 must enable me do this.
Is my line of interest irrelevant to the OsmocomBB project? In short, is the project intending to explore use of the phone for anything besides the conventional calling and conventional SMS. If you recall, my interest was to write code to enable the phone to 'sense' and detect signal from a remote source of few metres. I need to be able to write the code. Can i? I need a response desperately so that i stop cluttering the forum.
Ojenge
On 4/16/12, Andreas Eversberg andreas@eversberg.eu wrote:
Winston Ojenge wrote:
Dear all, I lecture at strathmore university, Kenya, East Africa. For my PhD, i need to develop a cell-phone model that senses and recognizes a specific RF frequency from a source. It then submits the value of that frequency by SMS.
Is it possible to use the OsmocomBB platform to program such a device using motorola C123?
Ojenge
On 4/16/12, Winston Ojengewojenge@strathmore.edu wrote:
Dear all, I lecture at strathmore university, Kenya, East Africa. For my PhD, i need to develop a cell-phone model that senses and recognizes a specific RF frequency from a source. It then submits the value of that frequency by SMS.
Is it possible to use the OsmocomBB platform to program such a device using motorola C123?
Ojenge
hi ojenge,
osmocombb supports sms. you can also "sense" RF frequence, but you need to add some feature to do measurement at the first plane and then send the sms with the results. c123 is capable of receiving GSM downlink frequencies only. you may also receive uplink and even (with modifications to the firmware) receive frequencies a bit outside GSM bands. in this case you need to replace filters or your signal level is reduced. the osmocombb firmware is capable of measuring rx levels of given frequencies while being idle on a gsm cell. what do you want to "sense"?
regards,
andreas
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
Hi Andreas, Much appreciation. I have to do it as long as it's possible. Thanks. Will update forum on my results progress. Ojenge
On 4/19/12, Andreas Eversberg andreas@eversberg.eu wrote:
hi ojenge,
you need to perform two steps:
- 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.
- 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
Hi Andreas. Much appreciation, but one more question. Can OsmocomBB code recognize any other signals which are non-GSM in the neighborhood of the c123, for instance, signals generated by radio/TV receivers? How can it be made to recognize them?
Ojenge
On 4/20/12, Winston Ojenge wojenge@strathmore.edu wrote:
Hi Andreas, Much appreciation. I have to do it as long as it's possible. Thanks. Will update forum on my results progress. Ojenge
On 4/19/12, Andreas Eversberg andreas@eversberg.eu wrote:
hi ojenge,
you need to perform two steps:
- 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.
- 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
baseband-devel@lists.osmocom.org
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Andreas Eversberg -
Winston Ojenge