the functions in REXLANG are case sensitive - try to use Sleep(seconds) instead of sleep(seconds).

Please, be aware that the Sleep function will stop whole task - so it will artificially extend the sampling period. It can be critical for some sort of applications. I would suggest to use some simple switching logic witihn REXLANG so that every odd tick you will perform write and every even tick read command.

Cheers, Tomas

I have been trying to use the sleep function in the rexlang block (so I can write to I2C wait and then perform a read for the ADC).

My problem is that I get the following error when compiling:
Error compiling file 'ads1115.c' (line 75): function 'sleep' is not declared
Error 125: The configuration validation error occured in:
Error 126:     Validation error -220 (REXLANG compilation error) in the pin 'pool_task.ADS1115:srcname'

I am not sure to understand why as the sleep function is supposed to exists in Rexlang. I am not sure what I am doing wrong.
Thanks,
Fred

Documentation:
void Sleep(seconds)
Stop execution of the block’s algorithm (and whole task) for defined time. Shortest possible time is about 0.01s, but depend on platform.