MultiIO board 4-20ma input testing


New member
I'm trying to conceptualize sampling a 4-20ma sensor connected to board using a bash script. How fast can I sample? I'm looking to get a ~5 second file worth of data. Thank you


Staff member
Considering the 4-20mA input channel has a low pass filter with a cutoff frequency of 150Hz it will be of no use to read more often than 300 times per second. Accessing the card at this rate depends on your type of Raspberry, OS, active tasks, and I2C frequency.
I must mention that the card sample rate is 1000sps and when you read it you will get the last sample.