I2C and dataSheets. How to get the information

Hi folks

I watched jery Blum's tutorial on I2C and have been reading up but i have some questions

  1. Jeremy says he wants the bytes located in registar 0. How does he know? Where is it Located on the Datasheet? He was using a TC74 http://ww1.microchip.com/downloads/en/DeviceDoc/21462c.pdf ?

If you can

I am planning to do a little project where i need to monitor the pressure in a fuel line in a car. I am trying to decide on what sensor to use. I figured an I2C comunication would be less prone to be influenced by noise than an Analog signal.

I found this.

http://ww1.microchip.com/downloads/en/DeviceDoc/21462c.pdf

I think i have the address of the chip figured out but i do not know what registar to poll for the 12 byte information.?

Any guidance, suggestion of help is application is appreciated. I am new and learning :slight_smile:

Thanks

Rob :slight_smile:

spkrman15:

  1. Jeremy says he wants the bytes located in registar 0. How does he know? Where is it Located on the Datasheet? He was using a TC74 http://ww1.microchip.com/downloads/en/DeviceDoc/21462c.pdf ?

Page 8. Section 4.0 REGISTER SET AND PROGRAMMER’S MODEL
There are only two registers. 0 for the temperature and 1 for configuration.

spkrman15:
I am planning to do a little project where i need to monitor the pressure in a fuel line in a car. I am trying to decide on what sensor to use. I figured an I2C comunication would be less prone to be influenced by noise than an Analog signal.

I found this.
http://ww1.microchip.com/downloads/en/DeviceDoc/21462c.pdf

I think i have the address of the chip figured out but i do not know what registar to poll for the 12 byte information.?
Any guidance, suggestion of help is application is appreciated. I am new and learning :slight_smile:

Looks like a cut and paste error. That's the same "Tiny Serial Digital Thermal Sensor" as above.

Usually there is a command to read all 12 bytes. Use the Wire library requestFrom() function to request 12 bytes: Wire - Arduino Reference