Well I have completed a couple of tests with the following environment:
- ~65 feet (20 meters) of separation between the Tx and Rx node (1st to=20
2nd floor and 4 interior walls)
- Suburban environment with Wifi, Bluetooth and other 'noise' sources.
--  Both nodes are within 15 feet of a WiFi node (ch 3 & 9)
-- Other WiFi nodes -- 3 on Ch1 -- 2 on Ch6 -- 1 on Ch10 -- 2 on Ch11
- Single Frequency Channel =3D=3D 83 (2.483GHz selected as the top edge of=
=20
WIFI Channel 13 to minimize WIFI interferance)
- Transmitter & Receive node  Max Retry =3D=3D 6; Retransmit delay =3D=3D=20
750uSec; Power =3D=3D 0 dbm; Data rate =3D=3D 250Kbps; Single Tx & Rx pipe
- Every 5 seconds (720/hour) Transmit a 6 byte message
- Tx Lost message =3D=3D Max Retry Interrupt set
- Rx Lost Message =3D=3D Rx Data Ready interrupt NOT set for the 5 seconds=
=20
sample period.

Day 1 a 12 hour test (9am <> 9pm)
- 8640 messages sent
- 489 Tx failures (Max Retry)   5.5%
- 10 Rx failures  (No message received in the 5 second window) 0.12%

Day 2 a 24 hour test (9am<>9am)
- 17280 messages sent
- 368 Tx failures (Max Retry)   2.13%
- 40 Rx failures  (No message received in the 5 second window) 0.23%

   It would appear that the primary failure is the ACK packet not being=20
detected by the transmitter.  Without a spectrum analyzer I can not=20
determine the cause of this failure.

   For my purposes a less than 1% loss is acceptable so it is time to=20
move on to other more pressing issues.

-Phil-

On 12/15/2013 10:01 PM, Phil Keller wrote:
> My environment is in home.   Lots and lots of interference with home and
> neighbors WIFI (my 2 AP's and the next door neighbors 4) & blue tooth
> devices, metal cabinets and wooden walls/floors.  The master device is
> on the second story in one corner of the house and the slave is in the
> other corner on the first floor, about 75 feet away.  Specifically
> chosen to cause a "typical" worst case setup.  Preliminary testing has
> the range limited to less than 75 feet (25 meters) with the actual
> number probably closer to 50 feet (16 meters).
>
>     I need to setup a controlled test sequence, maybe early this week,
> and I will report back.  So far I am disapointed with the results but
> controlled testing is in order before I jump to any conclusions.
>
> On 12/15/2013 7:35 PM, James Cameron wrote:
>> I'm curious to know how far you have pushed the range, and what sort
>> of environment you are operating in.
>>
>> On Sun, Dec 15, 2013 at 09:00:19AM -0800, Phil Keller wrote:
>>> SNIP

--=20
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