https://github.com/pulkin/mpy-agps

Micropython implementation of assisted location services (AGPS)
https://github.com/pulkin/mpy-agps

a9g agps database gps lbs micropython python

Last synced: 3 months ago
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Micropython implementation of assisted location services (AGPS)

• Host: GitHub
• URL: https://github.com/pulkin/mpy-agps
• Owner: pulkin
• Created: 2019-12-26T21:35:03.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2020-04-22T22:29:55.000Z (over 4 years ago)
• Last Synced: 2024-06-30T23:51:14.376Z (4 months ago)
• Topics: a9g, agps, database, gps, lbs, micropython, python
• Language: Python
• Homepage:
• Size: 25.4 KB
• Stars: 10
• Watchers: 4
• Forks: 4
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

• awesome-micropython - mpy-agps - MicroPython implementation of assisted location services (AGPS). (Libraries / Communications)

README

        
micropython-agps

----------------

For use with [micropython on GPRS module A9/A9G](https://github.com/pulkin/micropython/tree/master/ports/gprs_a9).

Examples

--------

### Location over internet connection:

```python

# Enable data connection

import cellular

cellular.gprs("apn", "user", "pass")

# Get location

import agps

agps.get_location_opencellid(cellular.agps_station_data(), "api-token") # Please visit https://opencellid.org for getting your API token

(78.86739615869062, 3.484547378491735)

```

### Location using local database:

Create a binary database of GSM cells:

```bash

~ ./bs-dl.py --mcc 234 --mnc 10 --circle=51.509865,-0.118092,3 -v --token api-token # Please visit https://opencellid.org for getting your API token

Target: 234-10.bin

Downloading https://opencellid.org/ocid/downloads?token=[token]&type=mcc&file=234.csv.gz ...

Unzipping ...

Parsing ...

Filtering ...

 - mcc: 322671 -> 322671

 - mnc: 322671 -> 99367

 - circle: 99367 -> 2749

Sorting ...

Items total: 2749

Preparing tables ...

Saving ...

Total size: 33010 bytes

Done

```

Filtering is done through entries `mcc` - mobile country code, `mnc` - mobile network code and `circle` - location and radius of a circle with cells.

All entries are optional, however, the full worldwide database is as large as 1Gb.

Providing `mcc` and `mnc` will reduce the databse size down to few Mb.

Providing a `circle` will further filter data towards the circular area specified: 3 km of urban area results in around 10Kb of data.

Note that the token is optional: without a proper token, the script will fall back to a git mirror which may contain outdated data.

Then, upload the database to the module (note the file name):

```bash

ampy --port /dev/ttyUSB0 put 234-10.bin

```

Finally, determine the location (no data connection needed):

```python

# Get location

import agps

import cellular

agps.get_location_local(cellular.agps_station_data(), "234-10.bin")

(51.54547378491735, -0.11739615869062)

```

Raw data

--------

Please find [here](https://github.com/pulkin/agps-data).