fix some arduino code

From the outset, Im only looking to spend up to about £30 on this - hope someone can help. Im running an arduino nano running with a DS18B20, a relay, and a tm1638, like this one [login to view URL] So far, serial output is this: ROM = 28 FF 27 A9 0 16 3 7F Chip = DS18B20 Data = 1 1C 2 4B 46 7F FF C 10 D9 CRC=D9 Temperature = 33.75 Celsius, 92.75 Fahrenheit Relay control is ok too, and I can set a fixed trigger value with: int threshold = 430; // 60=960 // 1 degree per 16 eg 10 deg is 160 I can also output to the tm1638, but not the data I want - struggling here. What I want to achieve is this, Display current temperature in Celsius on the lefthand 4 digits of the display (no more than 99 degrees required) and on the righthand 4 digits set a value using the buttons on the tm1638 that will set the target temperature, e.g. set "int threshold" value dynamically. I have uploaded current .ino file Current m1638 library, [login to view URL]