Hi, I am using Arduino and wifi shield, I followed the example and it works really good.
Now I want to send 2 variables, how can I do it?
Please help me
Best,
Rodrigo
Hello Rodrigo,
We’re happy to hear you’ve been successfully sending data using the Arduino. We have a specific endpoint to send several variables at the same time:
- Sending a collection of values
Although we don’t have a specific example for the Arduino, I would suggest modifying the sample code to fit this endpoint. Another option would be to call the “writeUbidots” function two times (or as many as you want) and pass the VARIABLEID as a different argument each time.
Please let us know if you need further help.
–Agustin
Thank you very much Agustin.
Please find attached an example with 5 differents variable to update. It works!
#include <WiFi.h>
//Dots configuration
#define TOKEN "Df2Pphb7BriUTs0JwkVOvv6su2zBPh2QY1FbPYok5OMHQelKFNY" //Replace with your TOKEN
#define VARIABLEID1 "5379cddb7625427e2efd958a" //Replace with your variable ID
#define VARIABLEID2 "5386d9c77625426be003b163" //second variable
#define VARIABLEID3 "538dde6d7625426dbe64dac1"
#define VARIABLEID4 "538dde5d7625426dbe64daaf"
#define VARIABLEID5 "538dde4d7625426dbe64daa6"
char ssid[] = "MarconiLab"; // your network SSID (name)
char pass[] = "marconi-lab"; // your network password
int status = WL_IDLE_STATUS; // the Wifi radio's status
WiFiClient client;
char server[] = "things.ubidots.com";
int resetTimer = 0;
void setup() {
Serial.begin(9600);
// check for the presence of the shield:
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
// don't continue:
while(true);
}
// attempt to connect to Wifi network:
while ( status != WL_CONNECTED) {
Serial.print("Attempting to connect to WPA SSID: ");
Serial.println(ssid);
// Connect to WPA/WPA2 network:
status = WiFi.begin(ssid, pass);
// wait 10 seconds for connection:
delay(10000);
}
// you're connected now, so print out the data:
Serial.print("You're connected to the network");
printCurrentNet();
printWifiData();
}
void loop() {
Serial.println("Trying to send data:" + String(analogRead(0)));
writeUbidots(String(analogRead(0)), VARIABLEID1 ); //Send data in String format to the Ubidots function
char buffer[14];
String in = dtostrf(analogRead(0)/1.5, 7,2,buffer);
writeUbidots(String(in), VARIABLEID2 ); //Send data in String format to the Ubidots function
writeUbidots(String(analogRead(0)*3), VARIABLEID3 ); //Send data in String format to the Ubidots function
writeUbidots(String(analogRead(0)*4), VARIABLEID4 ); //Send data in String format to the Ubidots function
writeUbidots(String(analogRead(0)*5), VARIABLEID5 ); //Send data in String format to the Ubidots function
if(resetTimer == 10) { //Restarts if the connection fails 10 times in a row
asm volatile (" jmp 0");
}
delay(1000);
}
void writeUbidots(String data, String VARID) {
String dataString = "{\"value\":"+ data + "}"; //Prepares the data in JSON format
if (client.connect(server, 80)) { //If connection is successful, then send this HTTP Request:
Serial.println("Connecting to " + String(VARID));
client.print("POST /api/v1.6/variables/"); //Specify URL, including the VARIABLE ID
client.print(VARID);
client.println("/values HTTP/1.1");
client.println("Host: things.ubidots.com");
client.print("X-Auth-Token: "); //Specify Authentication Token in headers
client.println(TOKEN);
client.print("Content-Length: ");
client.println(dataString.length());
client.println("Content-Type: application/json");
client.println("Connection: close");
client.println(); //End of HTTP headers
client.println(dataString); //This is the actual value to send
client.flush();
client.stop();
// return 1;
}
else { // If the connection wasn't possible, then:
resetTimer += 1;
Serial.println("Connection failed");
Serial.println("Device will restart after 10 failed attempts, so far:"+String(resetTimer)+" attempts.");
Serial.println("Killing sockets and disconnecting...");
client.flush();
client.stop();
// return 0;
}
}
void printWifiData() {
// print your WiFi shield's IP address:
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
Serial.println(ip);
// print your MAC address:
byte mac[6];
WiFi.macAddress(mac);
Serial.print("MAC address: ");
Serial.print(mac[5],HEX);
Serial.print(":");
Serial.print(mac[4],HEX);
Serial.print(":");
Serial.print(mac[3],HEX);
Serial.print(":");
Serial.print(mac[2],HEX);
Serial.print(":");
Serial.print(mac[1],HEX);
Serial.print(":");
Serial.println(mac[0],HEX);
}
void printCurrentNet() {
// print the SSID of the network you're attached to:
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// print the MAC address of the router you're attached to:
byte bssid[6];
WiFi.BSSID(bssid);
Serial.print("BSSID: ");
Serial.print(bssid[5],HEX);
Serial.print(":");
Serial.print(bssid[4],HEX);
Serial.print(":");
Serial.print(bssid[3],HEX);
Serial.print(":");
Serial.print(bssid[2],HEX);
Serial.print(":");
Serial.print(bssid[1],HEX);
Serial.print(":");
Serial.println(bssid[0],HEX);
// print the received signal strength:
long rssi = WiFi.RSSI();
Serial.print("signal strength (RSSI):");
Serial.println(rssi);
// print the encryption type:
byte encryption = WiFi.encryptionType();
Serial.print("Encryption Type:");
Serial.println(encryption,HEX);
Serial.println();
}Thank you Rodrigo!
Btw we have updated the Arduino WiFi Library so it can be included inside the Arduino IDE:
Hello
This working whit de WiFi Shield CC3000 ?
Thanks
The CC3000 module has a different connection process, which can be found here:
http://ubidots.com/docs/devices/cc3000.html
Let us know how it works with your shield!