Developing a universal module

Is it possible to use other PA and get output power up to 21dBm (23dBm)? For example SE2550BL (Spektrum X1TXN).

I spent a little time with Kicad this weekend. I like the interface better than Eagle, and like that all the files are text files, so I'll probably use that. I went and built Kicad parts for most of the RF components I listed above. It isn't much, but it is a start.

While I like the idea of a truly universal module, to be honest, there isn't that large of an incentive for me. If we could provide a populated board, I'd probably be more interested in going that way, but if we're talking DIY, I'm a big fan of keeping the total part count as low as possible.

I think I'll give up on the PIC solution. It doesn't have an on-board bootloader so now you need to have the proper programmer as well as everything else. The LPC1114 doesn't have USB, which is pretty limiting, but it does seem to be programmable via serial port. so maybe that is sufficient.

The STM32 also doesn't have a USB bootloader, though it also has a serial one.
The LPC1343 has a USB bootloader, which is convenient but requires soldering a usb port to the board I guess.

Alternatively, we could use something like the Teensy 3.0 board which is basically ready to go except for the traces for the various modules. You could use that without the need for any other board If you wanted to, or we could design a board which needs no chips, and just has the relevant most common headers. It is perhaps more expensive, but is certainly very convenient (I also happen to have one sitting here). It should easily be able to run the protocol stack as well, making it a good choice for a universal module.

Edit: After a little googling, I found an arduino nano which is half the cost of the teensy. It could probably also handle the protocol stack (though I'm not an arduino guy, so I'm not sure). the 5V thing will be a problem though, since we're talking about a 3.3V world here.

victzh wrote: BTW, do you have a spreadsheet or summary which protocols use which modulation, data rate, address length, CRC, and may be I am missing something else important? Maybe someone is producing a chip, powerful enough to cover all protocol requirements (except DSSS ones)? I know that A7105/A7125 have direct mode, but it's a bit close to software radio, which is fun, but probably not suitable for RC TX.

I started work on one at one time. Let me see what I can dig up.

Edit: Here's the beginning of a table:

Protocol	Transceiver	Data Rate	Modulation	Preamble	CRC
DEVO	CYRF6936	250kbps	8DR-32Chip	4SOP+16DATA+1LEN+???PRE	CRC16
WK2x01	CYRF6936	125kbps	8DR-64Chip	8SOP+16DATA+1LEN+???PRE	CRC16
DSM2 / DSMX	CYRF6936	15.625k (bind) / 250k (data)	SDR-64Chip (bind) / 8DR-32Chip (data)		CRC16
J6Pro	CYRF6936	125kbps	8DR-64Chip	8SOP+16DATA+1LEN+???PRE
Flysky	A7105	500kbps	FSK	4PREAMBLE+4ID	CRC16
Hubsan	A7105	100kbps	FSK	4PREAMBLE+4ID	CRC16
Skyartec	CC2500
Frsky1	CC2500
Frsky2	CC2500
V202	NRF24L01 BK2423
V922	NRF24L01E
NE260	NRF24L01
AnyLink	NRF24L01

Usjak wrote: For most of the people, the easiest would be to use DIP switch for chip select of various modules, IMHO.

I don't think it would be easier, then the current seamless modul switching on a model change...

Could someone (who speaks Chinese) figure out how to download the following?
www.rfembed.com/viewthread.php?tid=91&extra=&ordertype=1

I've tried to create an account, but the system hates me and won't let me login, doesn't send me email, and generally is being difficult.

Thanks everyone, but I already know how to use google
The issue is that every link seems to have some incredibly onerous process to be able to get to an actual download. The one I posted looked like it was the easiest of the lot. If someone actually manages to download the file, let me know. I've been trying for quite a while.

That is close, but I am looking for the 'Direct mode' reference document, and that is the 'FIFO mode' document (which I already know). The 'direct mode' pdf is likely also on their site (I think that is the contents of the zip I mentioned), though I'm not sure how to find it