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Table of Contents
CC2500
The CC2500 module is necessary to support the Skyartec and Frsky protocols. It is possible to scavenge this module from a Skyartec transmitter or to purchase it standalone. When searching ebay or aliexpress, searching for ‘CC2500 PA’ will often return reasonable results The small CC2500 is very small - about 17×12 mm. It has no PA and no LNA, It supports some telemetry, as I get voltage but no RSSI. A quick range test showed no problems out to over 100 meters using a FrSky D4R-II, at which point I ran out of room.
Skyartec
Link: http://www.skyartec.com/ProductShow.asp?ArticleID=1977
The Skyartec module can also be salvaged from a Skyartec Transmitter: SkyartecModuleRemoval
*4.0.1 and earlier: Connect 9→3.3v and 10→GND. Leave 5 and 7 floating
After 4.0.1, connect 5→10 and 7→9.
Aliexpress
Link: http://www.aliexpress.com/item/CC2500-PA-LNA-wireless-module-far-distance-2-4G/359941652.html
*4.0.1 and earlier: Connect 9→3.3v and 10→GND. Leave 5 and 7 floating
After 4.0.1, connect 5→10 and 7→9.
XL2500 (Ebay)
Link: http://www.ebay.com/itm/110983783515 ###
*4.0.1 and earlier: Connect 9→GND and 10→3.3v. Leave 3 and 8 floating
After 4.0.1, connect 3→10 and 8→9
Aliexpress-NoPA
Small-NoPA
Small-ReversedPA
!! Important !! For this chip in your hardware.ini file add this line without the “
“config_cc2500=0x01”