Hello. I have an Apogee SIL-411 SDI-12 infrared radiometer sensor that I plan to use with an Arduino Uno R3. I wanted to run my idea by some more experienced users.
(+) and (-) terminals to barrel jack connector for Arduino, 7.4v in. I can put a divider in between that but I don't think there's a point.
Wire 7.4v DC battery to sensor
SDI-12 from sensor to SDA pin on Uno
T the battery negative terminal and sensor ground together, send to GND pin. Note: Since the battery is 7.4v, should there be resistors between the T point and Arduino's GND?
Externally ground solar shield wire from the sensor
Sensor wiring is shown on page 10 of the manual (link below).
As for code, I would need to use the SDI-12 library for the Arduino. The formula to calculate temperature data is something I don't know how to convert. I think the correct one is Formula (3) on page 17 of the SIL-411 product manual.
The whole idea of the project is to send thermocouple and surface temp data from an Arduino to a Particle Boron through UART. The Boron will put everything into a tidy little CSV file, save it to an onboard SD card, and then transmit that data to the cloud via LTE.