FrSky telemetry app for Android phones - Page 3 - RC Groups
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Jun 15, 2012, 07:04 AM
Registered User
Quote:
Originally Posted by wic
.....

Pictures and more informations I can send on monday, because I go over the weekend sailing.

OT: Habt ein schönes Wochenende und liebe Grüße aus Finnland

Andy
Hi Andy,
what´s about the cell voltage?
Do you have some pictures?

@all:
Really quiet here even the download of the app really inreased?

No Issues/ Bugs to report. If so, very fine!

Your Input is apreciated.

Regards,
Thorsten
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Jun 15, 2012, 08:00 AM
Registered User
Quote:
Originally Posted by thorsten5
Hi Andy,
what´s about the cell voltage?
Do you have some pictures?

@all:
Really quiet here even the download of the app really inreased?

No Issues/ Bugs to report. If so, very fine!

Your Input is apreciated.

Regards,
Thorsten
I'm excited. I just have to wait until I gather the BT hardware.
Jun 19, 2012, 06:22 AM
PEMAC
SleepySean's Avatar
Very interested, I have a new samsung SII and have been looking for a telemetry display.

Would it be possible to create a wired connection, eg usb, instead of bluetooth?
Jun 19, 2012, 08:21 AM
Registered User
Hello SleepySean,
as far as I understand Android – theoretically yes; practically no.
On your radio side you would need a RS232 to USB converter, while on your phone side you need to root your phone and to install an USB to virtual com driver by adding some C code to the linux kernel.
I don’t see any advantage in using USB. Beside of the difficulties to realize it you need an additional cable connection. The necessary RS232 Bluetooth module costs only a few $ and can easily be added to your FrSky radio system.
Regards
Hartmut
Jun 19, 2012, 09:01 AM
Registered User
Takilara's Avatar
Quote:
Originally Posted by SleepySean
Would it be possible to create a wired connection, eg usb, instead of bluetooth?
Yes this is possible without rooting using http://www.elektor.com/magazines/201....2052326.lynkx

This basically uses the android debug tool to run TCP over USB to the device. The device hosts a TCP server that again converts to serial output.

App needs to be modified to support this though.

I have considered looking into this for my app, though interest has been limited.
(btw i am the creator of https://play.google.com/store/apps/d...mato.frskydash )
Jun 19, 2012, 10:01 AM
Registered User
So I got this BT adapter,

http://www.ebay.com/itm/ws/eBayISAPI...E:L:OC:US:3160

How do I determine whether or not I need an inverter?

I'd also like to know whether or not I need to hook up both tx and rx. It seems to me that the displays like the FLD-02 only need one wire of signal which (I suppose) would got to rx on the BT.
Jun 19, 2012, 10:29 AM
Registered User
Takilara's Avatar
Quote:
Originally Posted by wic
Yes, I have it also. But its dont show others than RSSI, AD1 and AD2.
This here show the hub data.

Best regards

Andy
The one on android marked has alpha support for hub as well. but it is "hidden",
To enable it, you have to Hit "About", then hit my name 5-6 times, then "Debug" mode is enabled. Hit Debug, and enable Alpha hub support. You can now use hub channels as source, or show the hub dashboard..
Jun 19, 2012, 10:47 AM
Registered User
Quote:
Originally Posted by Takilara
The one on android marked has alpha support for hub as well. but it is "hidden",
To enable it, you have to Hit "About", then hit my name 5-6 times, then "Debug" mode is enabled. Hit Debug, and enable Alpha hub support. You can now use hub channels as source, or show the hub dashboard..
Sneaky!
Jun 19, 2012, 10:52 AM
Registered User
Takilara's Avatar
Quote:
Originally Posted by dang
So I got this BT adapter,

http://www.ebay.com/itm/ws/eBayISAPI...E:L:OC:US:3160

How do I determine whether or not I need an inverter?

I'd also like to know whether or not I need to hook up both tx and rx. It seems to me that the displays like the FLD-02 only need one wire of signal which (I suppose) would got to rx on the BT.
I can't say for this app. For mine you will need both rx and tx if you want to program alarms.

I don't know if you need an inverter, but you will need a TTL to RS232 converter as the FrSky module is RS232 and not TTL level. I have more information regarding this here: http://projects.onomato.biz/projects...wiki/BlueTooth
Jun 19, 2012, 12:10 PM
Registered User
Hi Takilara,
an interesting module, which I didn’t know. But where is the advantage ?
- It’s more costly than the serial BT modules
- it has RS 485 port, which doesn’t fir to the serial FrSky in/out signals
- it requires to handle ADB packages
HaPe
Jun 19, 2012, 12:18 PM
Registered User
Hallo dang,
Right now you only need the rx-Pin of the Bt module.
As mentioned by Takilara FrSky used RS 232 logic, but not the RS232 defined voltage levels (V.24). Therefore a simple TTL signal inverter ( 1 transistor with necessary resistors will do)
HaPe

Takilara,
have you ever tested whether the Bt modules trigger on edges rather on level (0/1) at the serial TTL ports?
If so, not even an inverter would be necessary.
May be I will start some testing.
Jun 19, 2012, 12:21 PM
Registered User
Takilara's Avatar
Quote:
Originally Posted by HaPe
Hi Takilara,
an interesting module, which I didn’t know. But where is the advantage ?
- It’s more costly than the serial BT modules
- it has RS 485 port, which doesn’t fir to the serial FrSky in/out signals
- it requires to handle ADB packages
HaPe
I assume you mean the module that i use. I started this way back, and that was the only one with RS232 converter built in. I did not want to add components, but rather have one i could use directly. It is very true that a TTL level with a few added components will do the same job (and be cheaper), but will require making a pcb, stripboard or similar.
I was not aware of the 485 as i have no use for that. I only use the 232
Jun 19, 2012, 12:30 PM
Registered User
Takilara's Avatar
Quote:
Originally Posted by HaPe
Hi Takilara,
an interesting module, which I didn’t know. But where is the advantage ?
- It’s more costly than the serial BT modules
- it has RS 485 port, which doesn’t fir to the serial FrSky in/out signals
- it requires to handle ADB packages
HaPe
Ah, you mean the AndroPod...
I have never tested this, and it seems very "clunky". However it achieves wired connection without root.

Alot of people, including FrSky themselves have expressed concerns to me regarding using Bluetooth as that runs on similar frequency as the telemetry itself. I have been in constant communication with FrSky while developing my app.
I have never experienced problems with the link, and i have flown alot while using my app.

The AndroPod could provide an alternative to those that are sceptical of using Bluetooth for this purpose.
Jun 19, 2012, 01:45 PM
Registered User
Hi Takilara,
I can understand the concern about Bt impact to the 2,4 GHz systems. But if that is a risk for the FrSky system – what is about WLAN, switched ON at the mobile phones. The RF power is much higher then the Bt signal !
I guess the radio system designers are asked to take care for impact protection.
HaPe
Jun 20, 2012, 07:38 AM
Registered User
Takilara's Avatar
I tested out your app today, and realized that it is not only similar, but that alot of the source originates from my open source app. That is fine. But I was wondering if I you could please attribute where you got the source from? Both in the posts here and on your web page.

The nature of open source is of course that others can use the source and make it better. But it is normal good practice to also refer to the originating project or source when used.

It would be even better if you would decide to contribute to the existing open source project, so that everyone can benefit from the collective work.

Regards
Espen

http://projects.onomato.biz/projects/android-dash
https://play.google.com/store/apps/d...mato.frskydash


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