I have several Xbee Pro S1 modules. With the 802.15.4 FW they work well, with range outdoors of about 1.5Km. That's very nice.
I have started testing Digimesh Firmware (last version), and my tests fail with hops with distances over 150m. Using XCTU SW to debug, I discovered that modules with digimesh FW are not able to create links if RSSI is worse than aprox. -70dBm (with 802.15.4 links are ok until -95dBm aprox).
Is this making any sense? Why this huge difference in range/sensibility only by changing FW?
My modules are all the same model: XBP24-ASI 001 revE. I have assumed that these modules of year 2011 are able to run Digimesh firmware.
Thank you for your support