Weird RF behavior
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Posts: 46,084
hi everyone,
Thanks for all your past help, I've progressed a lot in my robot
project. I'm currently working on getting my flying blimp robot to
communicate with my ground robot via RF. I'm using a bs2sx and tws-
434 on the blimpbot and a handyboard and rws-434 receiver on the
ground robot. The thing is I can transmit one message perfectly (can
be a very long text string), but after the first message has been
received only junk is received. If I re-download code to the bs2sx
(by pressing alt-r), the message is once again transmitted perfectly,
but only once, then junk. So it seems that doing an alt-r for some
reason helps the initial successful transmission. The baud rates are
the same for transmitter and receiver are the same, 9600. I know that
this is the max of the bs2sx and that it is unreliable, but I can't
figure out how to change the handyboards baud rate to something
lower. I figure that the tws tranmissions and the receiver are
getting out of sinc after the first transmission (although this makes
it bizarre that alt-r works). So I have made the handyboard clear its
serial input buffer after it receives a message. I have put pauses on
the bs2sx trasnmissions to allow time for these handyboard buffer
resets, but this doesn't help. It seems that longer pauses in general
don't help, which is bizarre, because I figured that a long pause
would have the same effect as alt-r'ing the bs2sx.
Thanks for all your past help, I've progressed a lot in my robot
project. I'm currently working on getting my flying blimp robot to
communicate with my ground robot via RF. I'm using a bs2sx and tws-
434 on the blimpbot and a handyboard and rws-434 receiver on the
ground robot. The thing is I can transmit one message perfectly (can
be a very long text string), but after the first message has been
received only junk is received. If I re-download code to the bs2sx
(by pressing alt-r), the message is once again transmitted perfectly,
but only once, then junk. So it seems that doing an alt-r for some
reason helps the initial successful transmission. The baud rates are
the same for transmitter and receiver are the same, 9600. I know that
this is the max of the bs2sx and that it is unreliable, but I can't
figure out how to change the handyboards baud rate to something
lower. I figure that the tws tranmissions and the receiver are
getting out of sinc after the first transmission (although this makes
it bizarre that alt-r works). So I have made the handyboard clear its
serial input buffer after it receives a message. I have put pauses on
the bs2sx trasnmissions to allow time for these handyboard buffer
resets, but this doesn't help. It seems that longer pauses in general
don't help, which is bizarre, because I figured that a long pause
would have the same effect as alt-r'ing the bs2sx.