Digital Thermometer DS18B20

[sanjubluerock3]

hii i am sharing DIY digital thermometer using ds18b20 and pic16f877a (16x2) thanks to mvs sarma who helped me to complete the project .



Enjoy.....

 

[ZASto]

Wow, what an overkill for just a thermometer, I mean 16F877 is the overkill :smile:

 

[milind.a.kulkarni]

Hi Sanjubluerocks3 ....

One small question......are you did the code with CRC mentioned in the datasheet of DS18B20...

with regards,

Milind

 

[ZASto]

For such small board CRC is not necessary. Even reading and matching the serial number of the sensor is irrelevant because there is only one sensor. so the procedure for thermometer should be:

1. Skip ROM
2. Initiate temperature reading
3. Read Scratchpad
4. Do some math, depending on resolution that you are using
5. Show the temperature on the LCD
6. GoTo 1.

This is achievable with much smaller PIC, eg. 16F688.

(smaller by pin count, has internal osc, ...)

 

[milind.a.kulkarni]

Yaa got that but I was looking for CRC implementation in PIC ....so i asked that question.....thanks for reply