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Inexpensive BT serial adapter for Sky Safari

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#51 btschumy

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Posted 28 August 2014 - 07:02 PM

The RN-270 is "plug and play" with SkySafari (assuming he bought the male version).  You don't need to do any configuration.  The problems you had should not be present in the RN-270.



#52 elmiko

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Posted 28 August 2014 - 07:05 PM

I got the female version. It was cheaper.



#53 elmiko

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Posted 28 August 2014 - 07:29 PM

Thanks joshumax and btschumy. I will try your tips.



#54 btschumy

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Posted 28 August 2014 - 08:01 PM

If you have the female version then you will need a gender changer that is *not* a null modem as well.

 

Edit: As I think about it, you probably will need a null modem.  I believe the female version has send and receive reversed.


Edited by btschumy, 28 August 2014 - 08:05 PM.


#55 joshumax

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Posted 28 August 2014 - 08:14 PM

The RN-270 is "plug and play" with SkySafari (assuming he bought the male version).  You don't need to do any configuration.  The problems you had should not be present in the RN-270.

Whoops, I thought he meant he bought the bolutek device this thread is discussing....

 

I agree though, if it has a female connection end then you need a null modem adapter. The one discussed at the beginning of this thread should work nicely. If it has a male connection end, try getting a female null modem adapter and connecting it to a computer running some sort of serial interface capturing/monitoring software. If it spews out commands, the next thing I'd check is the scope cable and or the default baud rate of the RN-270 (should be 9600 8N1).



#56 elmiko

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Posted 28 August 2014 - 09:37 PM

So I ordered a m/m gender changer. Will that work? It will plug into the female BT. And on the other end it will plug into the f/ ds9 plug to serial plug to hand controller.



#57 btschumy

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Posted 28 August 2014 - 11:28 PM

No, I don't believe that will work.  You need a male/male null modem.  You need to change the gender as well as reverse Send and Recieve.  This is why we tell people to buy the male Bluetooth adapter.  Then it all just works.



#58 elmiko

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Posted 29 August 2014 - 08:56 AM

OK thanks Bill. I will try that and let you know if it works.

                     Thanks



#59 Edward E

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Posted 29 August 2014 - 03:36 PM

This BT dongle is the cat's meow and only $16.  5 years ago when I Bluetoothed my C11 GPS the only dongle that I could find that worked was the Aircable Serial 5 and it cost $99 plus I had to purchase a micro BT reciever for the laptop.  Maybe someone can post a you tube video showing one of these in action with the scope and tablet.

 

Great find!  :waytogo:


Edited by Edward E, 29 August 2014 - 03:47 PM.


#60 elmiko

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Posted 29 August 2014 - 08:40 PM

I would like to see a video of that. It would help a lot of us with out the best of tec skills.



#61 elmiko

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Posted 07 September 2014 - 12:47 AM

So finally got the null modem in the mail today. Tried it out inside the house today. It works! Cloudy tonight, hopefully clear tomorrow.

                     Thanks again for everyone's help!


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#62 patrizioitalian

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Posted 07 September 2014 - 04:52 AM

I bought the WiFi module with external TTL to Serial RS232 module.

I hope it will arrive soon to start my tests on it.

 

1PCS HC-21 Embed WIFI to Serial Port Wireless Module UART  at 11 dollars shipped...

 

with this :

 

MAX3232 RS232 Serial Port To TTL Converter Module Male DB9 Connector at 2.74 dollars shipped.

 

(I chose Male DB9 output... to connect to my female 505 Meade cable connector)

 

so total amount of 13,74 dollars for testing... I can do :)

 

 

I hope I can make it work with SkySafari and my Scope... Sure I need to use an WiFi access point for non ad hoc connections but Ok it's better I think, first cause Scope generally can stand not so far from my house (where I've just a working WIfI Network) and second because I can bring my scope in another place, I can bring in a different location far from my house where there is also a WiFi access point (example, at my mohter's house...). I know that controling my scope is not the only thing to do...

 

Best

 

Pat


Edited by patrizioitalian, 07 September 2014 - 04:56 AM.


#63 elmiko

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Posted 07 September 2014 - 02:13 PM

I paid $ 124.00 for the Bluetooth and $ 7.00 for the null modem adapter. Both prices include shipping. That was 100.00 less than the male blue tooth.I had the serial cable already.


Edited by elmiko, 07 September 2014 - 02:14 PM.


#64 patrizioitalian

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Posted 07 September 2014 - 05:20 PM

I paid $ 13 for all (shipped), Bluetooth module with serial DB9 Male output and NO NEED Null Modem... Male or Female Bluetooth is not a problem, you can buy a gender changer at 2 or 3 dollars, for Null Modem you can only change pin 3 with pin 2 and you can start to play. Serial cable was not a problem, it's only a 4 pin cable and a serial connector and RJ10, so 2 dollars are a lot for them if you have a meade or maybe the same for Celestron Scope.

 

$ 124 + $ 7 -  $ 13 = $ 118 less   and it worked perfectly.

 

Can I ask you which Bluetooth adapter did you buy at $ 124.00 ?

 

for a little more  (or less if used one) If you could use WiFi, you could buy the original Orion Starseek  or  Southern Stars SkyFi:

 

Orion Starseek:

2 new from $159.99 and 3 used from $85.99  at   Ama...on

 

Southern Stars SkyFi:

New at   $169.95 + $6.99 shipping at Ama...on

 

That was what I was doing if the cheap module didn't work.

 

Now I need to test also the WiFi module that I bought yesterday, just to test it also.

 

Best

 

Pat


Edited by patrizioitalian, 07 September 2014 - 05:39 PM.


#65 elmiko

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Posted 08 September 2014 - 12:42 AM

The roving networks 270



#66 patrizioitalian

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Posted 08 September 2014 - 03:56 AM

The roving networks 270

 

I understand but the price is very high (10 times more)  for a device Not dedicated to Astronomy (although they speak well of this module) and that will be difficult to resell it as used device in the future. I thought that if you are here in this thread you saw some posts of someone who tried different cheap module for this purpose, but ok, it's your choice.

 

Best

 

Pat


Edited by patrizioitalian, 08 September 2014 - 04:36 AM.


#67 btschumy

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Posted 08 September 2014 - 07:15 AM

Pat,

 

I'm happy if you are able to get your inexpensive BT adapter working.  However, the RN-270 is in another league and (to me) that justifies the higher price.  It has special transmitters/receivers to give it a range similar to WiFi, about 100 meters.  With your device, I suspect if you move more than about 6 meters from your scope, the connection will drop and you'll have to reconnect.  

 

The RN-270 is able to be configured via our software.  If you switch between mounts, you don't have to manually program the serial settings (baud rate, parity, etc) for each mount.  It just works.  Take it out of the packaging, pair it and you can control your scope.  Totally plug and play.

 

Finally, The RN-270 also has a well designed encloser that includes powering it by two AAA batteries.

 

For some folks all this convenience is worth the price, for others not.  Fortunately both options exist.


Edited by btschumy, 08 September 2014 - 07:15 AM.


#68 patrizioitalian

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Posted 08 September 2014 - 08:58 AM

Hi Bill

 

I didn't say it's a bad device, I saw that many use this module for their connection to their scopes.

The fact is that for using a bluetooth connection it's just enough about 10 meters, means that I'm in a car near the scope just outside the car (not more than 3 or 4 meters) or at my house and my scope beyond the walls just to stay warm at home. But for distances I don't conceive the use bluetooth connection, I prefer to use wifi connection, is more stable I believe, and is almost  in every home. If it's necessary an extra access point... ok it's not a big problem.

For the batteries, I have to put them the module in a plastic case so there can be a space for two AAA batteries, but generally people use a power tank to power different devices like the scope, camera.... si I can power to it. Most telescopes uses 9600 baudrate, parity none etc, I don't think I need to set it every time.

 

As you understood, for me (and for most people who have low budget come students....is convenience to use a cheap device. Fortunately both options exist of course.

 

Best

 

Pat


Edited by patrizioitalian, 09 September 2014 - 07:44 AM.


#69 elmiko

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Posted 08 September 2014 - 08:05 PM

I'm happy with the rn 270. I tried it out last night. It works great! Bill is right about the distance it will work. I had my scope on my cg5 in the back yard, went inside the house was about 30 ft away and it still worked. I did a 2 star plus 2 star cal. It put objects in center of eyepiece. Very Happy with my purchase.

               Clear nights.



#70 ccs_hello

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Posted 08 September 2014 - 10:46 PM

This should work:
http://m.aliexpress....1594549550.html

(Search btd433)

BTW, class1 can reach 100m line of sight but consumes more juice.

#71 patrizioitalian

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Posted 09 September 2014 - 07:47 AM

This should work:
http://m.aliexpress....1594549550.html

(Search btd433)

BTW, class1 can reach 100m line of sight but consumes more juice.

 

This is a nice module at a right price, It's in a plastic case and can reach 100m line.

 

The difference from mine is the plastic case and bt power but as I said before I prefer to reach far distances with WiFi connections.



#72 ccs_hello

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Posted 09 September 2014 - 06:31 PM

Pat,

 

Another option is USR-WIFI232 in that famous auction site.

(Ahhh, already mentioned in post #47...)

 

Clear Skies!

 

ccs_hello


Edited by ccs_hello, 09 September 2014 - 06:35 PM.







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