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# Radio Service
## Overview
Accelera Service allows getting data from acceleration, gyroscope and
electronic compass.
## Verbs
| Name | Description | JSON Parameters |
|:-------------------|:-------------------- -----------------------|:--------------------------------------------------------------- |
| subscribe | subscribe to accelero events | *Request:* {"event": "accel"} {"event": "magn"} {"event":anglvel"}|
| unsubscribe | unsubscribe to accelero events | *Request:* {"event": "accel"} {"event": "magn"} {"event":anglvel"}|
## Events
There are 3 different events matching with the different sensor available.
* "accel": is for acceleration data
* "magn": is for gyroscope data
* "anglvel": is for data
### frequency Event JSON Response
JSON response has a single field **frequency** which is the currently tuned frequency.
### station_found Event JSON Response
JSON response has a single field **value** of the frequency of the discovered radio station.
# AGL Radio Tuner Binding
## FM Band Plan Selection
The FM band plan may be selected by adding:
```
fmbandplan=X
```
to the [radio] section in /etc/xdg/AGL.conf, where X is one of the
following strings:
US = United States / Canada
JP = Japan
EU = European Union
ITU-1
ITU-2
Example:
```
[radio]
fmbandplan=JP
```
## Implementation Specific Confguration
### USB RTL-SDR adapter
The scanning sensitivity can be tweaked by adding:
```
scan_squelch_level=X
```
to the [radio] section in /etc/xdg/AGL.conf, where X is an integer. Lower
values make the scanning more sensitive. Default value is 140.
Example:
```
[radio]
scan_squelch_level=70
```
### M3ULCB Kingfisher Si4689
## Known Issues
### M3ULCB Kingfisher
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