I tested this by freezing the sensor on real hardware. The signs work out correctly.

For the last two weeks we have been having sub zero temperatures (-15 degrees F today) and I noticed that my DS18B20 units were not reporting the temperature correctly. This is the working code I came up with after discovering some caveats mentioned below: // ====================================== /...

This is an old post but I want to publish the remedy. The problem was not with the compiler but rather when the compiler was installed it apparently changed some of the project settings. The problem was that the 4x pll was disabled. It was enabled in earlier versions but this version shows it disabl...

No. I don't have any 18F45K22 units on hand. In the past I have used them interchangeably as long as the code and data fit.

I have attached photos of my dev board. However, this project has been in use monitoring greenhouses and other structures for several years. I have also posted code on LibStock pertaining to the use of DS18b20 devices. I have been using them successfully for some time now. http://libstock.mikroe.com...

My hardware is an EasyPIC v7.

I made no hardware changes when testing the different compiler versions.
The DS18b20 jumper is set to RE2 and there is a pull up on RE2 (using the on board switch).
PIC18F46K22

I have noticed that if I compile projects using the one wire library for the ds18b20 not all compiler versions function in Windows 10. v6.4.0 works fine, v6.6.1 and v6.6.3 do not. The later versions report exactly the same temperature when the ds18b20 is not even present. I have not noticed any prob...

I'm sorry this is so late. For the benefit of future readers. I set row=4 to break out of the for loop.

You could put a service socket on your device so when you need to replace a device you could just plug it in there and use code like this below to read the ID and copy it to the appropriate storage location. http://www.libstock.com/projects/view/1022/ds18b20-retrieving-the-unique-64-bit-serial-code-...

Note also for whole numbers, if you convert float to int it does not round off. I merely truncates the decimal values. Adding .5 before truncating resolves this issue.

The logic of reading a matrix keyboard is really pretty simple. When a key is pressed the row and column are shorted together. In my example I used pull down resistors to hold the columns to a low level. Then, one at a time, I bring each row up. If a key is pressed the corresponding column will also...

I had a similar problem some time ago. It had nothing to do with the LCD. I failed to declare string arrays large enough. If I recall correctly, I changed some variables from byte to integer and forgot to increase the array size when converting them to strings for display on the LCD. Some of the dat...

If I send: 12 34 56 78 9A (HEX) all the 5 bytes are into the array . If I send 12 34 00 78 9A (HEX) only 12 34 are into the array. If you are simply examining these as strings, remember that zero is the string terminator. Your second example only sees the first two bytes because they are followed b...

HyperUniverse, Writing your own keyscan routine is pretty easy and you can use any polarity you wish. Here is some code I use to open my garage door with a 4x4 or 4x3 keypad: /* Keypad connections: B4: Col 0 A0: Row 0 B5: Col 1 A1: Row 1 B6: Col 2 A2: Row 2 B7: Col 3 A3: Row 3 EasyPIC7 Turn on pull ...

How to do this depends on which PIC you want to use and which radio.

You might want to consider the nRF24L01+ for the radio:
http://www.libstock.com/projects/view/9 ... -libraries