You need to make two of these circuits. One acts as a transmitter and the other as a receiver. The wiring for both is identical. Once you have everything hooked up you are ready to go! One of the popular libraries is RF This library has been around for several years.
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Polling over SPI can be used instead. SPI commands can have variable length, the CSN signal has to stay low during the whole command, and then go high after the last byte. The first byte of a command defines the type of the command, the chip always outputs its internal status register at the beginning.
The following bytes are dependent on the command type, can be register values to write into the chip or payload data to send, or empty bytes that are ignored if the command only reads the output of the chip. Supports data rates of 1 Mbps and 2 Mbps. The registers in this bank have to be written with certain magic values specified in the datasheet before the chip can be used. Also has the second register bank. BK Another clone that only supports 1 and 2 Mbps. There is no data sheet available for this chip, but one can find the datasheet of a Wenshing Electronics TRWG2 module that contains the chip.
When searching online for BK datasheet one does however find various datasheets for other even completely unrelated Beken chips because the PDF title of these document is BK Specification; apparently the unreleased datasheet for this chip was used as a template for other datasheets without changing the title.
Found on some toy quadcopters ; datasheet is only available in Chinese. Often advertised as power enhanced or similar because the chip can transmit with 7dBm. Some forum posts name Silicon Labs as the manufacturer, however the datasheet contains no evidence for this, and DN-IC linked above seems to be a distributor and not a manufacturer.
Semitek Incompatible clone that uses a slightly different on-air format. The homepage of the manufacturer lists a whole range of similar 2. A comment by a Nordic employee under a hackaday. They did such a good job of cloning they cloned the datasheet error into the device!!! Decoded payload that is going to be transmitted.
The payload on the receiver side.
Nordic NRF24L01+ – Real Vs Fake