akcs.mattc@hpcvbbs.UUCP (Matt Cohen) (12/02/90)
Does anyone know of a syseval to turn the transmit led on/off so the hp48 can be used as a remote controller? the range is limited, but the application I have in mind is a learning controller. i can receive some stuff from other remotes by using srecv routine. Thanks in advance, for posting the information ... Matt Cohen (1(mcohen@bnr.ca) Raleigh , NC
TNA32@CCVAX.IASTATE.EDU (FRINGE) (12/03/90)
In the past, this question came up a few times, and Alonzo decided to try it. He also came to the conclusion that it couldn't be done because "the range of the LED was only a foot or two." He was wrong. Any of you with IR printers tried running your frinter from 5-6ft away? Works, doesn't it (if you've got decent battaries on the printer).... Although the 48's receiver (I'll say it again, RECEIVER) is very low powered, just like every learning remote on the market, it has a decent TRANSMITTER. The code that is needed is how to get around the error correction coding on transmit and receive. When data is received from a remote, a good bit of it is stripped out as it is received - what the calc. thinks is error correction bits. This would be fine, if when it sent the codes again it placed the same code back into the data....but it doesn't. We need a way to access the ir ports directly, around the error correction gear. -fRiNgE