MQTT Auto Discovery and JSON payload

Configuration
4

It shows in mqtt

You need device {}

You can use short names. See docs.

Just as example:

$mqttpub -t "homeassistant/sensor/${id}/${devx}_${1}/config" \
-m '{
 "unit_of_measurement":"ms",
 "state_class":"measurement",
 "expire_after":"120",
 "icon":"'$icon'",
 "name":"'"$name $dev $3"'",
 "state_topic":"'"$topic/${id}/${devx}_${1}"'",
 "availability_topic":"'$topic/${id}/status'",
 "unique_id":"'"${id}_${devx}_$1"'",
 "device":{
   "identifiers":"'${id}'",
   "name":"'"$name"'",
   "model":"'"$model"'"}
 }'

$mqttpub -t "homeassistant/binary_sensor/${id}/${id}_status/config" \
-m '{
 "device_class":"connectivity",
 "payload_on":"online",
 "payload_off":"offline",
 "expire_after":"120",
 "name":"'"$name Status"'",
 "state_topic":"'"$topic/${id}/status"'",
 "availability_topic":"'$topic/${id}/status'",
 "unique_id":"'"${id}_status"'",
 "device":{
   "identifiers":"'${id}'",
   "name":"'"$name"'",
   "model":"'"$model"'"}
}'