zabbix_sender with JSON for LLD

[mauro]

Hello.
I search in the forum and on the Web, I found instructions but work at 100%.
Briefly: I have created a template, on this a discovery rules key: status.backup, no filters, type zabbix trapper.
One item prototype: type zabbix trapper, name Backup Status {#PLANS}, text, no more.
Craete an host test_backup_host and linked this template.

Ok, now I prepared a JSON File:
test_backup_host status.backup{"data":[{"{#PLANS}":"Daily Backup"}]}

and use zabbix_sender:
zabbix_sender -z serverName -i file.json

Perfect, in the host appear the new discoverd item status.backup[Daily Backup].

Now I want to valorize it. With the sender and the -o it works but I want to execute only one data send, just with the json.
I try many "configurations":
test_backup_host status.backup{"data":[{"{#PLANS}":"Daily Backup","{status.acronis[Daily Backup]}":"ok"}]}
test_backup_host status.backup{"data":[{"{#PLANS}":"Daily Backup","{status.acronis['Daily Backup']}":"ok"}]}
test_backup_host status.backup{"data":[{"{#PLANS}":"Daily Backup","value":"ok"}]}
...
nothing.
the Item was created but the value still remain null.

Where is the mistake?
Thx

[mauro]

I'm stupid.
The key is status.backup and this is for autodiscover... I can't (in the same row) set the value for the new discovered item.
two line is necessary for me:
test_backup_host status.backup {"data":[{"{#PLANS}":"Daily Backup"}]}
test_backup_host status.backup[Daily Backup] ok

but in this way, sometimes the second row don't set the value: probably because the item has not yet been created, ie a few milliseconds have passed since the request from the previous sender.

Other ideas are welcome.