addressing a smart sensor that uses 16f877 - Electronic Circuits Projects Diagrams Free

tuncay · 8th May 2004, 10:18 PM

I have a project about designing a protocol between smart sensors. First i need to design some sensors. (I'm a beginner about ucontrollers.) I will use pic16f877 because of its ADC and SPI. I will use rs485 protocol between sensorsç But i don't know anything about addressing the sensors. Can i do it with that ucontroller and how? if anyone sends some codes it'll be better. (i use pic c compiler)

Exo · 8th May 2004, 11:15 PM

Are you going to build these sensors yourself or are they premade? what are these sensors supposed to sense? ...

More information is required ....

gtrman1992 · 11th May 2004, 04:19 AM

If the sensors support 485 comms then the address of the sensor is in the polling packet sent by the master.

MASTER: <STX><SensorID><PleaseTxReading><ETX>

The sensor will then reply with the data requested

SENSOR: <STX><SensorID><HereIsData><ETX>

tuncay · 23rd May 2004, 02:31 PM

thanks for your attentions.
it's not important what to sense about thhe sensors. it will sense and the signal will be converted to digital by the ADC in the ucontroller. My problem is how to address the sensors and make them reply when the master want... İ need program codes about that...

tuncay · 23rd May 2004, 02:34 PM

Quote:

Originally Posted by Exo

Are you going to build these sensors yourself or are they premade? what are these sensors supposed to sense? ...

More information is required ....

thanks for your attentions.
it's not important what to sense about thhe sensors. it will sense and the signal will be converted to digital by the ADC in the ucontroller. My problem is how to address the sensors and make them reply when the master want... İ need program codes about that...

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8th May 2004, 10:18 PM	(permalink)
tuncay	addressing a smart sensor that uses 16f877 I have a project about designing a protocol between smart sensors. First i need to design some sensors. (I'm a beginner about ucontrollers.) I will use pic16f877 because of its ADC and SPI. I will use rs485 protocol between sensorsç But i don't know anything about addressing the sensors. Can i do it with that ucontroller and how? if anyone sends some codes it'll be better. (i use pic c compiler)

8th May 2004, 11:15 PM	(permalink)
Exo	Are you going to build these sensors yourself or are they premade? what are these sensors supposed to sense? ... More information is required ....

11th May 2004, 04:19 AM	(permalink)
gtrman1992	If the sensors support 485 comms then the address of the sensor is in the polling packet sent by the master. MASTER: <STX><SensorID><PleaseTxReading><ETX> The sensor will then reply with the data requested SENSOR: <STX><SensorID><HereIsData><ETX>

23rd May 2004, 02:31 PM	(permalink)
tuncay	thanks thanks for your attentions. it's not important what to sense about thhe sensors. it will sense and the signal will be converted to digital by the ADC in the ucontroller. My problem is how to address the sensors and make them reply when the master want... İ need program codes about that...