ESP8266 01 Relay problems
Posted: Sat Nov 18, 2017 4:44 pmFirst of all thanks about Reading my post.
I am new to this things of arduino and 8266. I am triying to power on a light bulb over the internet using an 8266 01, a 1 channel 5V relay, a light bulb and an arduino uno rev3.
This is my actual scheme:
Here is the code i am running on the 8266:
Everithing Works fine, when i send to the mqtt channel to turn on, i see the blue light on the 8266 blink.
The problem is that when i connect the GPIO2 to the relay and i turn ON the signal, the light bulb turns on but the 8266 crash and it restarts itself.
When i turn OFF the power directly to the Light bulb from my house like this scheme:
The esp Works perfectly i mean, i can see that when i send the command to turn on the blue light of the 8266 blinks with no problem and no crash, i hear too that the relay turns on and off without problems.
Things i already tried:
- Replace the relay with a diode: it worked.
- Replace the light bulb with a diode: it worked.
- Try with a different ESP8266 01: same problem.
- Try with a different Relay: same problem.
- Try with another power supply: same problem.
- Connect the IN1 from the relay directly to the ground of the protoboard: the light bulb turned on without problems.
Thanks for your time again, I hope I can find a solution soon :).
I am new to this things of arduino and 8266. I am triying to power on a light bulb over the internet using an 8266 01, a 1 channel 5V relay, a light bulb and an arduino uno rev3.
This is my actual scheme:
Here is the code i am running on the 8266:
Code: Select all
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
const char *ssid = "MY SSID";
const char *pass = "My Pass";
IPAddress server(192, 168, 1, 73); // Raspberry IP
const int relay = 2;
#define BUFFER_SIZE 100
void callback(const MQTT::Publish& pub) {
// handle message arrived
Serial.print(pub.topic());
Serial.print(" => ");
Serial.println(pub.payload_string());
if(pub.payload_string() == "on")
{
Serial.println(pub.payload_string());
digitalWrite(relay, LOW); // Should turn off the relay.
}
else
{
Serial.println(pub.payload_string());
digitalWrite(relay, HIGH); // Should turn on the relay.
}
}
WiFiClient wclient;
PubSubClient client(wclient, server);
void setup() {
pinMode(relay, OUTPUT);
// Setup console
Serial.begin(115200);
delay(10);
Serial.println();
Serial.println();
digitalWrite(relay, HIGH);
client.set_callback(callback);
}
void loop() {
if (WiFi.status() != WL_CONNECTED) {
Serial.print("Connecting to ");
Serial.print(ssid);
Serial.println("...");
WiFi.begin(ssid, pass);
if (WiFi.waitForConnectResult() != WL_CONNECTED)
return;
Serial.println("WiFi connected");
}
if (WiFi.status() == WL_CONNECTED) {
if (!client.connected()) {
if (client.connect("ESP8266: FlexoF")) {
client.publish("outTopic","hello world");
client.subscribe("FlexoF");
}
}
if (client.connected())
client.loop();
}
}
Everithing Works fine, when i send to the mqtt channel to turn on, i see the blue light on the 8266 blink.
The problem is that when i connect the GPIO2 to the relay and i turn ON the signal, the light bulb turns on but the 8266 crash and it restarts itself.
When i turn OFF the power directly to the Light bulb from my house like this scheme:
The esp Works perfectly i mean, i can see that when i send the command to turn on the blue light of the 8266 blinks with no problem and no crash, i hear too that the relay turns on and off without problems.
Things i already tried:
- Replace the relay with a diode: it worked.
- Replace the light bulb with a diode: it worked.
- Try with a different ESP8266 01: same problem.
- Try with a different Relay: same problem.
- Try with another power supply: same problem.
- Connect the IN1 from the relay directly to the ground of the protoboard: the light bulb turned on without problems.
Thanks for your time again, I hope I can find a solution soon :).