One trick I use a lot - allows an imitation of the ternary operator in a lot of cases.

Boolean operations return 1 for true and 0 for false.

So use:

.v1 = (.v2 < 20) + 2. // 3 if v2 is < 20 else 2

.flag = (.v == 10) // flag true if v = 10

Martin

Is that 'in tractor' or only on the bench?

If it's in situ - how long are the leads to the Nextion display? Interfence might be affecting that?

Odd, how about waiting until the value changes from 128 - it sounds as though only the start byte is being received correctly. Can you just display (or send to uart) all the data received?

I tried this - I've used a timer interrupt to add data if running as a simulation.

I think the issue is - your code continually searches for 128 - and as soon as it is found - attempts to read 4 bytes from 'after' the 128.
These may not have been received yet...
So - one solution is wait for 128 to be found then wait until caunt_rx >= 4 and then display the values.

Martin

Just done a quick test I did PutArray(.test, 10) LookForValue(.seek, 1, true, true) Where test = {x,x,x,128,129...) where x is any value and seek[0] = 128 LookForValue just returns 1 if the search value is found. (would the index (or -1) be better?) Then GetByte returns the 'following' data So in th...

You can set a character in a string to 128.as above. Each character is a byte. You can set values using a number as shown or a character (in single quotes) or set the whole string.

You can use LookForValue with a byte array or a string.

byte or string .val[1] // Looking for 1 value
.val[0] = 128

Then use LookForValue(.val, 1, ...)

Martin

There is a programming axiom "any program can be optimised by at least one instruction" - though taken to its logical conclusion it implies that the best programs have no instructions at all. I would suspect splitting some code to a second MCU will be quite tricky - why not just use one with more me...

Which MCU are you using. Some, such as the Atmega 328p in the Arduino only have hardware interrupts on specific pins. Other MCUs allow more pins to be used - look up custom interrupt in the Wiki. There is an Arduino library that mimics interrupts on any pin - but this just checks the pin state regul...