Weather Station

Projects General Guidance
1

A colleague of mine has a weather station that sends out serial data in the form of a string such that it is of the following format:

Node, Relative Wind Direction, Relative Wind Speed, Corrected Wind Direction, Corrected Speed,
Pressure, Relative Humidity, Temperature, Dewpoint, GPS Location, Date and Time, Supply Voltage, Status, Checksum.

I have attached the data sheet that details the output.

My colleague wants to send this data over a network via udp and has asked me to try and do this via a Leonardo ETH.

When the weather station is connected to putty the output is as detailed in the data sheet. however when I try to read the serial data using an arduino and the serial monitor (I'm using a MEGA ADK at the moment to check the serial data), I get data that is in int format (I assume) however I'm trying to see how this data relates to that in the data sheet.

I have attached the sketch (very basic) and a copy of the data I obtain.

Manual-ingles-Maximet.pdf (195 KB)

data.screenshot.png
data.screenshot.png1440×868 194 KB

basic_sketch.ino (242 Bytes)

2

Try

   Serial.print((char) Serial1.read());

Judging from the values seen on the serial monitor, you may not have the baud rate correct or you might have to remove the top bit as follows:

   Serial.print((char) (Serial1.read() & 0x7F));

Also, if this is genuine RS232 (with positive and negative voltage levels), you must use an RS232 to TTL serial adapter to connect to the Arduino, or you will damage the Arduino.

3

Sorry for late reply

The RS232 to TTL converted did the trick......many thanks.