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How to read serial data in c builder software#
+1 /* This is sample C code as an example */ +2 /* Example of loading stats data into InfluxDB in its Line Protocol format over a network using HTTP POST */ +3 #include +4 #include +5 #include +6 #include +7 #include +8 #include +9 #include +10 +11 /* YOU WILL HAVE TO CHANGE THESE FIVE LINES TO MATCH YOUR INFLUXDB CONFIG */ +12 #define PORT 8086 /* Port number as an integer - web server default is 80 */ +13 #define IP_ADDRESS "9.137.62.Free professional-grade C++ coding bundleĬ++Builder is a free software development application intended to be used by those who are involved with the development & IT sector. I found that I needed 3 spaces at the end of the line to get InfluxDB to realize there was not timestamp - frankly I gave up trying dozens of combinations to get it to work. This large value is the number of nanoseconds since (commonly called the epoch). This option probably what you want as you then don't have to work out the number in the C code. This syntax means InfluxDB itself generates the timestamp at the time of the data arriving.
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I think is to confirm that the programmer knows what they are doing and have the right port number! The "Host: Influx:8086" is InfluxDB HTTP API.The "HTTP/1.1" is HTTP and pointing out using version 1.1 of the HTTP protocol.The "write" meaning we are writing data to InfluxDB. It is the command you want InfluxDB to perform. The "/write" and following details are in the InfluxDB HTTP API.The details all of these parts are mandatory to get precisely correct, including the spaces and carriage-return and line-feeds:.An example of the output of this code like looks like this POST /write?db=rand&u=Nigel&p=passw0rd HTTP/1.1 Host: influx:8086 Content-Length: 38.The Header is HTTP and InfluxDB HTTP API details and created in line 65.The Body content is the statistics in Line Protocol format and covered in the next section. Ignore the call to the random() function that is used to generate fake data in this example code. The Body is simple enough in this case and created in line 61.
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The Body is prepared first as we need the final size in bytes to create the Header.This data is InfluxDB Line protocol formatted statistics.
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