A 4-layer PCB with a solid ground plane and thermal vias is recommended. Ensure a minimum of 1mm clearance around the device for airflow and heat dissipation.
Use the device's low-power mode, reduce the clock frequency, and optimize the transmit power. Additionally, consider using a low-dropout regulator (LDO) to minimize power consumption.
Set the internal voltage regulator to 1.2V for optimal performance. Ensure the input voltage is within the recommended range of 2.7V to 5.5V.
Verify the SPI clock frequency, mode, and polarity. Ensure the slave select signal is properly configured. Use a logic analyzer or oscilloscope to debug the SPI signals.
Use a combination of antenna switching and diversity algorithms to optimize antenna selection. Ensure the antennas are properly matched and the device is configured for antenna diversity mode.