Data read error

[miguepoloc]

Hello, I am trying to read the data from a LUFFT 600 weather station or a Hydrolab DS5x probe but I have been able, even if I connect the SDI-12 data pin to any of the pins of the arduino it does not recognize it. How much I achieved was what is sampled in the image and nothing else. Using an OTT datalogger if it was possible to observe the data.

[SRGDamia1]

What type of Arduino are you using? Are you using a level-shifter of any kind? SDI-12 standard is 12V, but some instruments use other voltages. Some sensors may also need extra "wake-up" time before responding to commands. You add that by adding the time as an extra argument on the sendCommand function; ie, sendCommand("1M!",100).