NRF24L01+ Failing AckPayload

Using Arduino Networking, Protocols, and Devices
8

The high power modules don't work well when too close, specifically when using

 radio.setPALevel(RF24_PA_MAX);

You could try lower settings.

Added:

Have a look at this Signal problems with long-range Nordic nRF24L01+PA+LNA 2.4GHz RF module.

This could be interesting too Fixing your cheap nrf24l01+ pa/lna module