tpetar
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LCD Module Control over IR Link
Link : https://avtanski.com/projects/lcd_serial/
Good idea to showup temp or other 1-wire data on distance without cable. Just for thinking for future circuits and design.
Recently I got my hands on a couple of HSDL-1100 based IR transceivers and a KS070B LCD display module. This was a nice opportunity to experiment with three things: (1) controlling an LCD module, (2) serial communication between two PIC microcontrollers, and (3) making this work over an IR link.
Data is encoded as a sequence of short pulses. The beginning of a data packet is shown below:
The time between the first two pulses (T) is compared to the times between the following pulses. "0" is transmitted as time between pulses less than T; "1" - time between pulses greater than T.
The receiver code and the LCD constants include file can be used without any change. The transmitter generates a moving two line "Hello World!" message. Note that transmitter was written for use with IR modules that invert pulse polarity - for direct connection pulse polarity must be inverted in the transmitter code.
Link : https://avtanski.com/projects/lcd_serial/
Good idea to showup temp or other 1-wire data on distance without cable. Just for thinking for future circuits and design.
Recently I got my hands on a couple of HSDL-1100 based IR transceivers and a KS070B LCD display module. This was a nice opportunity to experiment with three things: (1) controlling an LCD module, (2) serial communication between two PIC microcontrollers, and (3) making this work over an IR link.
Data is encoded as a sequence of short pulses. The beginning of a data packet is shown below:
The time between the first two pulses (T) is compared to the times between the following pulses. "0" is transmitted as time between pulses less than T; "1" - time between pulses greater than T.
The receiver code and the LCD constants include file can be used without any change. The transmitter generates a moving two line "Hello World!" message. Note that transmitter was written for use with IR modules that invert pulse polarity - for direct connection pulse polarity must be inverted in the transmitter code.