If at the beginning for nrf24l01+ we do not make high-quality external power supply, powered wireless module from Arduino circuit, he can not work or do not work stably, for solving the problem need to set as close as possible to the module capacitor between VCC and GND (recommended 4.7 μF tantalum).

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More by Daniil Koptyukhov:Program Arduino Pro Mini with FTDI FT232RL nrf24l01 Problem: Insufficient power from Arduino 
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