Hello,
I’ve managed to communicate to uMIRF’s with 2 PICs.
However the transmission quality seems to be pretty poor.
For example I send 4 bytes payload (using shockburst),
and one of the bytes it is a counter. like 0x01, 0x02, 0x03, 0x04.
I would usually receive 0x02, 0x05, 0x09
missing a lot of information.
Anyone know where the problem might lie? Is this typical? should i try to correct this with software somehow?
Thanks.
I too had the same problem. I still cant get the example program to work with 100% efficency but my results have gotten better. The umirf seems to operate much better by adding an electrolytic capacitor between VSS (3v pin) and ground. ( be careful in observing polarity ). A 10uf value works great for me. Between this and writing my own code it works great. Wish I had more info. My 2 cents.
If that doesn’t solve all… repost with more info about your application. Like the power supply you’re using. Their are also a few tweaks you can use in your own code by adjusting some bytes in the configuration word. For instance the umirf works best with 250k transmission speed, 16-bit CRC. Perhaps changing oper frequency would help. There’s a link to a really cool Configuration program in an older post. do a search for “nrf2401 configuration program” it should pop up. I should warn you if you use the program check 1Mb for 250k transmission and vice versa. But its just small bug in a great program.
I tracked down the link for ya
http://www.sparkfun.com/cgi-bin/phpbb/v … on+program
Here’s a program written in PBASIC. I found it useful in understanding how to write my own code. PBASIC is easier read for me… C can get really blurry to the untrained eye like my own 