My relay doesn't turn off

Hi team cayenne.

I have a problem with my relay when I connected a water pump.
The fact is that when I use the relay with normal arduino it turns off and on correctly, but when I want to turn it off with cayenne the board disconnects and the pump does not turn off. However, if I connect an LED to the relay it works well with cayenne, it only happens when I connect the pump.

My component are:
Arduino uno
Ethernet shield w5100
Pump halija DC3- 5v

The error message when i put the pin in 0:
[0] MAC: xxx
[7519] IP: xxx
[7520] Connecting to
[7843] Connected
[11456] CAYENNE_IN_DEFAULT(1) - xGv0HJMJwGM7yoF, 1
[106452] Disconnected
[106454] Connecting to
[108284] Network connect failed
[111111] Network connect failed
[113937] Network connect failed

The code is:
#define CAYENNE_PRINT Serial
#include <CayenneMQTTEthernet.h>

// Cayenne authentication info. This should be obtained from the Cayenne Dashboard.
char username = “xx”;
char password = “xx”;
char clientID = “xx”;

#define ACTUATOR_PIN 7

void setup()
Cayenne.begin(username, password, clientID);

void loop()

// This function is called when data is sent from Cayenne.
CAYENNE_LOG(“CAYENNE_IN_DEFAULT(%u) - %s, %s”,, getValue.getId(), getValue.asString());

// Write value to turn the relay switch on or off. This code assumes you wire your relay as normally open.
if (getValue.asInt() == 1) {
	digitalWrite(ACTUATOR_PIN, HIGH);
else {
	digitalWrite(ACTUATOR_PIN, LOW);


from the serial monitor output it looks like your device disconnects after you turn ON the relay and never connects back. can you share the pic of your circuit.

Hi shramik,

My circuit is similar to the one in the cayenne tutorial, and I have tried many combinations without success. But, if I program the code from arduino it works well for me.
The problem is when I turn off the pump, the message never gets sent. When I turn it on it works well.
Sometimes when I open cayenne the relay goes on by default, if I change to zero, the message is sent well because the pump is disconnected, then I turn it on and it works fine, but once the pump is on, if I try to turn it off, Cayenne is disconnected.

can you join me on