It sounds like the reciever is not being set up correctly, thus never sending the acknowledgement back to the sender. Make sure the TX and RX addresses are the same on both devices.Perhaps compare the implementations. This works perfectly for full du...

Pretty old question but if anyone stumbles upon it I managed to port an ESP library to the STM8. Even the ACK works.https://github.com/nicogutz/NRF24_STM8_Library