Hi,
I am connecting to a webserver and getting an answer with the right data. I want to use some of the returning characters as input for a pwm led driver. For that to work, I have to extract the relevant data from the input and turn them into an integer. It is the valuebetween < and> in the monitor. How can I do that? Where can I best look for an answer?
What might help is if I would not get the content type etc. text back every time. I guess that has to do with the syntax of the GET message. Does anyone have a suggestion for me for that?
I attached a screenshot of the monitor output.
Thanks, Jan.
/*written for nano33 IoT
First Serial is started, then WIFI.
A connectio0n is made to server "tuin",
and every 5 seconds a http request is sent.
The lux level is answered.
This is stored as a CHAR CHAR and printed on the serial monitor
*/
#include <SPI.h>
#include <WiFiNINA.h>
char ssid[] = "PBL"; // your network SSID (name)
char pass[] = "xxxxxxxxxx"; // your network password
int status = WL_IDLE_STATUS;
IPAddress tuin(192,168,2,121); // remote server we will connect to
WiFiClient client;
void setup()
{
Serial.begin(9600);
while (!Serial)
{
;
}
Serial.print("Attempting to connect to WPA network ");
Serial.print("SSID: ");
Serial.println(ssid);
status = WiFi.begin(ssid, pass);
if ( status != WL_CONNECTED)
{
delay(10000);
while(true);
}
Serial.println("Connected to wifi");
Serial.println("Starting connection to server");
}
void loop()
{
client.connect(tuin, 80);
client.print("GET /control/rcontrol?action=gettext&message=<$(SEN.LXL)>\n");
delay(5000);
while (client.available())
{
char c = client.read();
Serial.print(c);
}
}
