NMEA gem woes

egghead Master Posts: 274	NMEA gem woes Apr 24, 2019 7:20:23 GMT Quote Select Post Deselect Post Link to Post Back to Top Post by egghead on Apr 24, 2019 7:20:23 GMT Apr 24, 2019 4:22:42 GMT egghead said: OK. Sorry for the confusion. But can we include any gem as part of Rhodes? Please ignore

Vladimir Musulainen Moderator Posts: 109	NMEA gem woes Apr 24, 2019 15:06:28 GMT Quote Select Post Deselect Post Link to Post Back to Top Post by Vladimir Musulainen on Apr 24, 2019 15:06:28 GMT Try to use the option 'enable_eval' at rhoconfig.txt. This option is undocumented. enable_eval = 1. Be careful, the App Store can reject your application, because eval is prohibited by App Store rules.
	Last Edit: Apr 24, 2019 15:33:28 GMT by Vladimir Musulainen

egghead
Master

Posts: 274

NMEA gem woes Apr 25, 2019 7:06:12 GMT

Quote

Post by egghead on Apr 25, 2019 7:06:12 GMT

Apr 24, 2019 15:06:28 GMT Vladimir Musulainen said:

Try to use the option 'enable_eval' at rhoconfig.txt. This option is undocumented.

enable_eval = 1.

Be careful, the App Store can reject your application, because eval is prohibited by App Store rules.

Thanks a lot. That worked! My app will not be distributed through App Store for now, but just curious, this is for Apple AppStore or Google PlayStore?
Also the gem developer updated the gem yesterday and removed all references to require_relative. He also said he switched from using class_eval to define_method, but I still find that enable_eval is still required.

The latest gem version is at rubygems.org/gems/nmea_plus/versions/1.0.24

I just tested with simple NMEA message in controller and displaying the variables. Now I work to get the actual data from the GPS dongle...

Vladimir Musulainen Moderator Posts: 109	NMEA gem woes Apr 25, 2019 14:15:46 GMT Quote Select Post Deselect Post Link to Post Back to Top Post by Vladimir Musulainen on Apr 25, 2019 14:15:46 GMT Good!

Alex Epifanov
Global Moderator

Posts: 470

NMEA gem woes Apr 29, 2019 15:17:24 GMT

Quote

Post by Alex Epifanov on Apr 29, 2019 15:17:24 GMT

Apr 25, 2019 7:06:12 GMT egghead said:

Apr 24, 2019 15:06:28 GMT Vladimir Musulainen said:

Try to use the option 'enable_eval' at rhoconfig.txt. This option is undocumented.

enable_eval = 1.

Be careful, the App Store can reject your application, because eval is prohibited by App Store rules.

Thanks a lot. That worked! My app will not be distributed through App Store for now, but just curious, this is for Apple AppStore or Google PlayStore?
Also the gem developer updated the gem yesterday and removed all references to require_relative. He also said he switched from using class_eval to define_method, but I still find that enable_eval is still required.

The latest gem version is at rubygems.org/gems/nmea_plus/versions/1.0.24

I just tested with simple NMEA message in controller and displaying the variables. Now I work to get the actual data from the GPS dongle...

As far as I know Apple rules does not allow dynamic code changes or scripts that can be downloaded by network ( which theoretically can be done with ruby code and 'eval'-ing it ). Not sure about google but there are lots of PL interpreters in the Play Store so my guess this is not a problem for them.

egghead
Master

Posts: 274

NMEA gem woes Apr 30, 2019 13:26:12 GMT

Quote

Post by egghead on Apr 30, 2019 13:26:12 GMT

Thanks for the supplementary information, Alex.

However, although the gem is now working, I am struggling to get the full NMEA sentence emitted by the GPS BT dongle. I always get part of the NMEA sentences, not getting a full sentence.
Example given in screenshot attached.

My controller code :

require 'rho/rhocontroller'

require 'helpers/browser_helper'

require 'rho/rhobluetooth'

require 'nmea_plus'

class GagantestController < Rho::RhoController

include BrowserHelper

#@layout = 'Gagantest/layout'

$device_name = ''

$connected_device = ''

$current_status = 'Not connected'

$str = ''

$lat=''

$lon=''

$fxtime=''

# $message=nil

$msgvalid=''

$msgdatatype=''

$msgintdatatype=''

$msgallrecd=''

def index

puts 'GagantestController.index'

$device_name = Rho::BluetoothManager.get_device_name()

#puts "$device_name=" + $device_name.to_s

WebView.execute_js('setStatus("'+$current_status+'");')

WebView.execute_js('setConnectedDeviceName("'+$connected_device+'");')

WebView.execute_js('setStr("'+$str+'");')

render

end

def start_bluetooth

if Rho::BluetoothManager.is_bluetooth_available()

$current_status = 'Connected!'

WebView.execute_js('setStatus("'+$current_status+'");')

Rho::BluetoothManager.create_session(Rho::BluetoothManager::ROLE_CLIENT, url_for( :action => :connection_callback))

#WebView.refresh

else

Alert.show_popup('Bluetooth not available')

WebView.navigate (url_for :action => :index)

end

end

def connection_callback

if @params['status'] == Rho::BluetoothManager::OK

$connected_device = @params['connected_device_name']

WebView.execute_js('setConnectedDeviceName("'+$connected_device+'");')

Rho::BluetoothSession.set_callback($connected_device, url_for( :action => :session_callback))

WebView.navigate (url_for :action => :index)

else

Alert.show_popup('Could not connect!')

WebView.navigate (url_for :action => :index)

end

end

def session_callback

if @params['event_type'] == Rho::BluetoothSession::SESSION_INPUT_DATA_RECEIVED ##&& @params['connected_device_name']==$connected_device

while Rho::BluetoothSession.get_status($connected_device) > 0

if @params['event_type'] == Rho::BluetoothSession::SESSION_DISCONNECT

$connected_device_name = ''

$current_status = 'Disconnected'

WebView.execute_js('setStatus("'+$current_status+'");')

WebView.execute_js('setConnectedDeviceName("'+$connected_device+'");')

WebView.execute_js('setStr("'+$str+'");')

Alert.show_popup('Connection lost!')

WebView.navigate (url_for :action => :index)

end

$str = Rho::BluetoothSession.read_string($connected_device)

WebView.execute_js('setStr("'+$str+'");')

#here

# end

# if "GPGLL" == message.data_type

# $lat=message.latitude

# $lon=message.longitude

# $fxtime=message.fix_time

# break

# close_all

# end

end

else

$connected_device = ''

$current_status = 'Not connected'

#$str = ''

WebView.execute_js('setStatus("'+$current_status+'");')

WebView.execute_js('setConnectedDeviceName("'+$connected_device+'");')

WebView.execute_js('setStr("'+$str+'");')

Alert.show_popup('Connection lost!')

WebView.navigate (url_for :action => :index)

end

WebView.execute_js('setStr("'+$str+'");')

WebView.navigate (url_for :action => :index)

end

def close_all

Rho::BluetoothSession.disconnect($connected_device)

Rho::BluetoothManager.off_bluetooth()

$connected_device = ''

$current_status = 'Not connected'

#$str = ''

WebView.execute_js('setStatus("'+$current_status+'");')

WebView.execute_js('setConnectedDeviceName("'+$connected_device+'");')

WebView.execute_js('setStr("'+$str+'");')

Alert.show_popup('Disconnected!')

WebView.navigate (url_for :action => :index)

end

end

Where did I do wrong? Any suggestions?

egghead Master Posts: 274	NMEA gem woes May 2, 2019 5:30:59 GMT Quote Select Post Deselect Post Link to Post Back to Top Post by egghead on May 2, 2019 5:30:59 GMT Apologies for the un-indented code. Maybe I'm missing something here, but what is the difference between Rho::BluetoothSession.read_string($connected_device) and Rho::BluetoothSession.read($connected_device)

Vladimir Musulainen Moderator Posts: 109	NMEA gem woes May 2, 2019 6:51:16 GMT Quote Select Post Deselect Post Link to Post Back to Top Post by Vladimir Musulainen on May 2, 2019 6:51:16 GMT it returns array of bytes (read) or a string (read_string)

egghead
Master

Posts: 274

NMEA gem woes May 2, 2019 7:06:30 GMT

Quote

Post by egghead on May 2, 2019 7:06:30 GMT

Hmm...Yes, I saw the byte array (on using read). That's not what I need.

Main problem is that I'm getting a continuous data stream from the BT dongle, and much of that data is not complete, but in bits and pieces, i.e., I'm not getting the complete NMEA sentences to parse.

Any tips on parsing such continuous streams? One way may be adding records into the model and then removing the incomplete sentences and then processing the rest.

Not sure if that's the best way though.

Alex Epifanov
Global Moderator

Posts: 470

NMEA gem woes May 2, 2019 23:20:45 GMT

Quote

Post by Alex Epifanov on May 2, 2019 23:20:45 GMT

May 2, 2019 7:06:30 GMT egghead said:

Hmm...Yes, I saw the byte array (on using read). That's not what I need.

Main problem is that I'm getting a continuous data stream from the BT dongle, and much of that data is not complete, but in bits and pieces, i.e., I'm not getting the complete NMEA sentences to parse.

Any tips on parsing such continuous streams? One way may be adding records into the model and then removing the incomplete sentences and then processing the rest.

Not sure if that's the best way though.

Try playing with this kind of construction:

while Rho::BluetoothSession.get_status(device_address) > 0

message = Rho::BluetoothSession.read_string(device_address)

end

egghead
Master

Posts: 274

NMEA gem woes May 3, 2019 10:07:57 GMT

Quote

Post by egghead on May 3, 2019 10:07:57 GMT

device_address doesn't seem to work

I just tried to see what this returns :


def connection_callback
    if @params['status'] == Rho::BluetoothManager::OK
     $device_addr = @params['device_address']
     WebView.execute_js('setdeviceaddr("'+$device_addr+'");')

but $device_addr returns nothing

BTW, device_address refers to the mobile device or the BT dongle?

Last Edit: May 3, 2019 10:30:27 GMT by egghead

egghead Master Posts: 274	NMEA gem woes May 6, 2019 5:38:16 GMT Quote Select Post Deselect Post Link to Post Back to Top Post by egghead on May 6, 2019 5:38:16 GMT Is it another un-documented feature?
	Last Edit: May 6, 2019 5:38:52 GMT by egghead

jontara Senior Member Posts: 129	NMEA gem woes Jun 22, 2019 0:31:57 GMT Quote Select Post Deselect Post Link to Post Back to Top Post by jontara on Jun 22, 2019 0:31:57 GMT FWIW, Rhodes require_relative seems broken when the path starts with "./". But you can still use a relative path, starting with extension directory. I ran into this with ruby-jwt

Post by egghead on Apr 24, 2019 7:20:23 GMT

Post by Vladimir Musulainen on Apr 24, 2019 15:06:28 GMT

Post by egghead on Apr 25, 2019 7:06:12 GMT

Post by Vladimir Musulainen on Apr 25, 2019 14:15:46 GMT

Post by Alex Epifanov on Apr 29, 2019 15:17:24 GMT

Post by egghead on Apr 30, 2019 13:26:12 GMT

Post by egghead on May 2, 2019 5:30:59 GMT

Post by Vladimir Musulainen on May 2, 2019 6:51:16 GMT

Post by egghead on May 2, 2019 7:06:30 GMT

Post by Alex Epifanov on May 2, 2019 23:20:45 GMT

Post by egghead on May 3, 2019 10:07:57 GMT

Post by egghead on May 6, 2019 5:38:16 GMT

Post by jontara on Jun 22, 2019 0:31:57 GMT

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