I wanted to do some wireless stuff to my shed & chicken coup - control of lights, remote temp sensing etc, so excitedly bought the XBee starter kit. Put them together yesterday and went through the XBee configuration over a Serial to USB cable. All that went OK. XBee's configured and passed the ping test.
Then tried to program the 18X. Serial chip removed, jumpers configured - programming editor spits out at "memory verification failed (byte 4)" Error. Tried the other board - same problem. Tried different power supplies, 4.5v (3 nice fresh out the packet AA's), freshly charged 7.2v nicad through the 9v input, 5V regulated via 7805, fresh 9v PP3 on the 9v input - all give the same problem. Swapped the 18X for another and went through it all again. Still no joy.
Tried the USB/Serial cable onto an old 18 in a breadboard setup. Programmed OK. Made up a new breadboard for the 18X which gave the now familiar error. Swapped in the old 18 and it works fine. So, tried another few 18x chips - some of which I bought some time back. The error byte varied - 3, 6, 251 but apart from one older 18x, all the others failed to program.
Now - I can't believe TS have just sent me 5 dud 18x's - but what else could it be? I've never had any problems in the past - except when I switched to the USB cable - after which I seem to have had problems downloading programs where none existed before.
Any ideas please?
Then tried to program the 18X. Serial chip removed, jumpers configured - programming editor spits out at "memory verification failed (byte 4)" Error. Tried the other board - same problem. Tried different power supplies, 4.5v (3 nice fresh out the packet AA's), freshly charged 7.2v nicad through the 9v input, 5V regulated via 7805, fresh 9v PP3 on the 9v input - all give the same problem. Swapped the 18X for another and went through it all again. Still no joy.
Tried the USB/Serial cable onto an old 18 in a breadboard setup. Programmed OK. Made up a new breadboard for the 18X which gave the now familiar error. Swapped in the old 18 and it works fine. So, tried another few 18x chips - some of which I bought some time back. The error byte varied - 3, 6, 251 but apart from one older 18x, all the others failed to program.
Now - I can't believe TS have just sent me 5 dud 18x's - but what else could it be? I've never had any problems in the past - except when I switched to the USB cable - after which I seem to have had problems downloading programs where none existed before.
Any ideas please?