ATM, I'm using a ESP8266 (ESP-link) with an Ebyte NRF52832 as a mysensors gateway (LINK)

Can anyone point me on how to achieve this.
So my goal is:
Let all my NRF52832 mysensor nodes report to an MQTT broker (preferably bound to an ESP8266)

Who can point me in the right direction, or even better, tell me how to achieve this.