not working with mkr1300 about arduino-sdi-12 HOT 3 OPEN

What sort of sensor is it? The reply message from the sensor depends on a number of factor. Eg initial message type (m or c etc) and the type of data request (d0 d1 etc), if I know the sensor I can check out its manual and then diag the range of M instructions and also what the response message will be when you ask For data.

Cheers mal

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Hi, Thanks for the reply I am attaching the link to my sensor manual(https://www.fondriest.com/pdf/sentek_drill_drop_probe_manual.pdf), I am using 3 sensor-1 probe type. when I try with M commands it was not responding for the sensor values but when I try with C commands it was coming but in between the sensor values I was getting value as 1.

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Hi. Firstly I’ve not successfully got the sdi12 library working with my arduino so there are some bits of the puzzle I don’t have answers to.
Regarding your sensor..... it’s not an easy sdi12 one to interrogate as it is super smart and has lots of different data it can provide and not in a single response message. IE to get temp, moisture and salinity you will need to send a M for temp and then data and then a new m for moisture and then data etc etc.
To start simple ... I suggest you build your program and instead of sending a M and the D just sent the identification instruction.
Ie send 0I! .... the sensor will respond (no need to send a D command) with a character string which should include things like maker, model, serial number etc.

This will confirm your code is good and comms to the sensor is ok.
If you want.. send me your program, although im no programming expert.

See if you get the 0I! Working and then send back a update.

I’m assuming your sensor is sdi12 address 0.
Also... have you been able to directly interrogate the probe with the software provided?
Does your probe look like the one in the manual on page 1?
Cheers mal

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