Change icon based on item state using a String

Setup, Configuration and Use Beginners
1

Hello

Is it possible to change the icon (e.g light bulb) based on the state when using a with a item String i can do this when i set a item as a switch?

i currently have a ESP8266 set up to read the sate of a smoke alarm. and sends back either 1 or 0 depending on if the alarm i activated. if i set the item as a switch the icon charges depending on the state however it will on show ON or OFF in the BasicUI and i would prefer it to have say CLEAR OR FIRE DETECTED i can do this setting the item as a string but can achieve both at the same time. when setting the item as a string the icon wont change. can i get the best of both woulds or not?

i am using a map to change the 1 or 0 sent by the ESP to openhab to CLEAR OR FIRE DETECTED.

Thanks

2

Yes, keep the Item as a Switch and use the map in the Item’s label.

https://docs.openhab.org/addons/transformations.html

Or use a String Item and create custom dynamic icons.

https://docs.openhab.org/configuration/items.html#icons-dynamic

3

if i have it as a switch as below

Switch   F2_Fire       "Fire Alarm [%s] "            <Fire>         (gAlarm)          {mqtt="<[mqttoh2:/Alarm/fire/fire:state:MAP(test.map)],
<[mqttoh2:/Alarm/fire/fire:command:ON:1.00],<[mqttoh2:/Alarm/fire/fire:command:OFF:0.00]"}

then my map has to be

1=ON
0=OFF

for it to work but i would like to change the ON/OFF to CLEAR OR FIRE DETECTED but when i do this openhab stops show the right State

fire%20alarm

can you tell me where am i going wrong please

4

You need two maps. One that you use on the binding like you are now and another you use in the label. See the transformations link provided above.

5

hi thank you for your help, i understand the idea of what needs to be done. just cant get it to work with what i have, i just dont think i have the skills to but it in to practice at the moment i think i will need to return to this when i understand what i am doing a little more.

thanks

6

I think what you want is this.

Switch   F2_Fire       "Fire Alarm [MAP(test2.map)] "            <Fire>         (gAlarm)          {mqtt="<[mqttoh2:/Alarm/fire/fire:state:MAP(test.map)],
<[mqttoh2:/Alarm/fire/fire:command:ON:1.00],<[mqttoh2:/Alarm/fire/fire:command:OFF:0.00]"}

test2.map

ON=FIRE DETECTED
OFF=CLEAR
1 Like
8

Thank you, have got it working

9

Yeah sorry I forgot its [MAP(test2.map):%s]