Hi,
I did the following test, I send some data values from my mqtt client:
mosquitto_pub -h eu.thethings.network -t ‘app/devices/first_id/down’ -u ‘app’ -P ‘ttn-account-v2.key…’ -m ‘{“payload_fields”:{“led”:true,“temp”:456,“press”:123}}’
In TTN Console appers new values, see screen shot, but in telegraf nothing changed.