I would like to pull data off a neurio power meter in my electrical box. Pinging the device at the local ip address: 192.168.0.166/current-sample in a web browser reliably returns a string from which I could extract the info I need (those not easily). I have been trying to use the arduinohttpclient library to do so but I'm missing something. I have explored the: SimpleHTTPExample.ino and SimpleGET.ino without success. I do seem to connect to the KHostname[] = "192.168.0.166" - as I get an "OK" rather than a "connection failed". I have tried countless interactions of the kPath[] = "/current-sample"; such as:
kPath[] = "/current-sample/";
kPath[]= "192.168.0.166/current-sample";
kPath[]= "192.168.0.166/current-sample/";
kPath[]= "http:/192.168.0.166/current-sample";
kPath[]= "/";
I get an error response code of -3 which the documentation does not define that I can see.
Here is my output:
Attempting to connect to WPA SSID: X%_-^(O)^-_%X
connected
startedRequest ok
Getting response failed: -3
I feel I'm close to making this work but missing something basic as my understanding of http business is minimal. Appreciate any suggestions.
#include <ArduinoHttpClient.h>
#include <WiFiNINA.h>
#define ssid "X%_-^(O)^-_%X"
#define pass ""
const char kHostname[] = "192.168.0.166";
const char kPath[] = "/current-sample";
const int kNetworkTimeout = 30*1000;
const int kNetworkDelay = 1000;
WiFiClient c;
HttpClient http(c, kHostname);
void setup()
{
//Initialize serial and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
// attempt to connect to WiFi network:
Serial.print("Attempting to connect to WPA SSID: ");
Serial.println(ssid);
while (WiFi.begin(ssid, pass) != WL_CONNECTED) {
// unsuccessful, retry in 4 seconds
}
Serial.println("connected");
}
void loop()
{
int err =0;
err = http.get(kPath);
if (err == 0)
{
Serial.println("startedRequest ok");
err = http.responseStatusCode();
if (err >= 0)
{
Serial.print("Got status code: ");
Serial.println(err);
// Usually you'd check that the response code is 200 or a
// similar "success" code (200-299) before carrying on,
// but we'll print out whatever response we get
// If you are interesting in the response headers, you
// can read them here:
//while(http.headerAvailable())
//{
// String headerName = http.readHeaderName();
// String headerValue = http.readHeaderValue();
//}
int bodyLen = http.contentLength();
Serial.print("Content length is: ");
Serial.println(bodyLen);
Serial.println();
Serial.println("Body returned follows:");
// Now we've got to the body, so we can print it out
unsigned long timeoutStart = millis();
char c;
// Whilst we haven't timed out & haven't reached the end of the body
while ( (http.connected() || http.available()) &&
(!http.endOfBodyReached()) &&
((millis() - timeoutStart) < kNetworkTimeout) )
{
if (http.available())
{
c = http.read();
// Print out this character
Serial.print(c);
// We read something, reset the timeout counter
timeoutStart = millis();
}
else
{
// We haven't got any data, so let's pause to allow some to
// arrive
delay(kNetworkDelay);
}
}
}
else
{
Serial.print("Getting response failed: ");
Serial.println(err);
}
}
else
{
Serial.print("Connect failed: ");
Serial.println(err);
}
http.stop();
// And just stop, now that we've tried a download
while(1);
}
