in V2 the MQTT subscription of single payload fields was disabled:
Will it stay that way in V3?
Background for my question:
I am developing a device based on a single ESP8266 - and this device is getting the data via MQTT. (yes - i am using an ESP to GET the data from TTN, not to send it ) Subscribing to one device is working fine - but requires a huge buffersize to handle the whole data.
Later i would like to subscribe up to 10 devices - but with all the unneccessary data i am running into some memory problems. Subscribing the payload fields only could save a lot of memory and would make the code a lot smarter.
Thanks for the answers in advance!