Need to recend a recieved item

Setup, Configuration and Use Items & Sitemaps
1

Hello,

I use ESPEASY and on one of the controllers i hooked up a nextion display, which sends a value through MQTT this is working fine for now.

But now i need to use this recieved value to control a mqtt dimmer on a differrent control.

how can i do this.

below are the both item lines

both lines may be merged together, but don’t know how to set this up.

Dimmer Dimmer_kleur "Stalamp Dimbaar" {mqtt=">[ajg:/ESP_Dimmer_kleur/dim/:command:*:default]"}
Dimmer Dimmer_Test "Test Dimbaar" {mqtt="<[ajg:/ESP_Easy_Test/test/value:state:default]"}
2

You don’t need to resend the value,
you can just have the dimmer subscribe the the topic sent by the espeasy.
/ESP_Easy_Test/test/value

Try to avoid starting MQTT topics with /.
It adds a layer to the topics and can lead to confusion and errors

Good luck

3

Or if you really want to:

Dimmer Dimmer_Test "Test Dimbaar" {mqtt="<[ajg:/ESP_Easy_Test/test/value:state:default], >[ajg:/ESP_Dimmer_kleur/dim/:command:*:default]"}
4

This i had, but the light isn,t dimming. The slider in the app was working.

5

There is a typo in the outbound topic:

Dimmer Dimmer_Test "Test Dimbaar" {mqtt="<[ajg:/ESP_Easy_Test/test/value:state:default], >[ajg:/ESP_Dimmer_kleur/dim:command:*:default]"}

Remove the / at the end of the topic

6

When i remove the trailing / my dimmer is not working

7

What is your dimmer?
Have your checked that it subscribe to the correct topic?

8

Well, this is what i have for the dimmer, it’s a plugin for espeasy.
And it is connecting to the right topic, because the dimmer is working from the webpage.

and also stated in your first post, removing the fist / is also bot working.

//#######################################################################################################
//#################################### Plugin 200: Dimmer ##################################################
//#######################################################################################################

#define PLUGIN_200
#define PLUGIN_ID_200         20000
#define PLUGIN_NAME_200       "Dimmer 230V "
#define PLUGIN_VALUENAME1_200 "Dimmer"


boolean Plugin_200_init = false;

boolean Plugin_200(byte function, struct EventStruct *event, String& string)
{
  boolean success = false;

  switch (function)
  {
    case PLUGIN_DEVICE_ADD:
      {
        Device[++deviceCount].Number = PLUGIN_ID_200;
        Device[deviceCount].Type = DEVICE_TYPE_I2C;
        Device[deviceCount].VType = SENSOR_TYPE_DIMMER;
        Device[deviceCount].Ports = 0;
        Device[deviceCount].PullUpOption = false;
        Device[deviceCount].InverseLogicOption = false;
        Device[deviceCount].FormulaOption = false;
        Device[deviceCount].ValueCount = 0;
        Device[deviceCount].SendDataOption = false;
        Device[deviceCount].TimerOption = false;
        break;
      }

    case PLUGIN_GET_DEVICENAME:
      {
        string = F(PLUGIN_NAME_200);
        break;
      }

    case PLUGIN_GET_DEVICEVALUENAMES:
      {
        strcpy_P(ExtraTaskSettings.TaskDeviceValueNames[0], PSTR(PLUGIN_VALUENAME1_200));
        break;
      }

      case PLUGIN_INIT:
        {
          Serial.begin(9600);
          addLog(LOG_LEVEL_INFO, F("Dimmer: Init OK "));
          break;
        }


      case PLUGIN_WRITE:
      {
        String log = "";
        String command = parseString(string, 1);

        if (command == F("dim"))
        {
          Plugin_200_Write(event->Par1);
          log = String(F(" Set Dim level to ")) + String(event->Par1);
          addLog(LOG_LEVEL_INFO, log);
        }
      }
    }
  return success;
}


//********************************************************************************
// Dimmer write
//********************************************************************************
void Plugin_200_Write(byte Par1)
{
  Serial.write(Par1);
}
9

I don’t know espeasy
Did you check that the mqtt message gets sent?
Use a MQTT client like MQTT.fx

10

I see the incomming message, but it isn’t resend to the correct topic.
Is this somthing within openhab.
And yes i have mqtt client softwre running.

11

It is not openHAB
The topic /ESP_Easy_Test/test/value update the state of your item.
A state change is difference than a command
That is why there is a postUpdate method and a sendCommand method for items

If you change your dimmer item on a sitemap, the mqtt outbound binding will send a value on the topic /ESP_Dimmer_kleur/dim

If you also do Dimmer_Test.sendCommand(25) in a rule it will send the mqtt.

See:

https://docs.openhab.org/configuration/rules-dsl.html#manipulating-item-states

12

so if i’m right i have to make rule that send a command on a event update.

13

First you need to check the espeasy website to make double sure of what is the topic your device subcribes to.
It should work as it is.