THIS IS FROM THEIR SETUP RSSI INFO PAGE

The AT commands are in the brakets at the side. Compare to my code.


In order to test the range between two devices, it is possible to put two XRF's into a special mode via either the AT commands or the XCM. Once in the special mode it will send a packet once a second from an XRF connected to your PC (master) to another 'remote' (slave) XRF. The slave XRF will measure the incoming RSSI level and send the packet straight back. The master XRF then measures the RSSI of this and displays both packets serially.

The image below shows the continuous output you will see on your screen. We're interested in the first two values:
aSSRSSIS-045 (the signal strength of 045) received at the slave and
aMMRSSIM (046) received at the master (your PC).
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HOW TO SETUP
During setup we advise turning off any other XRFs, so that only the two you are using to test range are turned on. If this is impossible then change the two devices to be tested to another PANID.
First set up the slave (remote end).
1. Configure on your PC using XCM or AT commands
2. Change ATNT (node type) to 4 (ATNT4)
3. Write to permanent memory (ATWR)
4. Close the session (ATDN)
Unplug the first XRF and plug in the second XRF
Configure the master (PC end)
1. Configure on your PC using XCM or AT commands
2. Change ATNT (node type) to 3 (ATNT3)
3. Write to permanent memory (ATWR)
4. Close the session (ATDN)
5. Leave the second XRF on your PC and in a serial monitor window as above
Test Power up the first XRF with 2 to 3.6v, at a distance over 1 meter away. Two AA batteries are perfect for this, but make sure your voltage is not greater than 3.6v
You will see the two RSSI levels being written to the screen once a second.
MAXIMUM RANGE When the RSSI figures reach 88 to 92 you've reached the maximum distance you can achieve reliably. If you are planning to run at distances close to this then we advise conducting the test a few times during the day to make sure you are getting a reliable connection.