nRF24l01模块NF24库使用问题

路人甲、 · 发表于 2021-9-3 20:36

我希望用NRF24L01模块进行通信，代码我使用的是NF24库的官方示例代码：

#include <SPI.h>
#include "printf.h"
#include "RF24.h"
// instantiate an object for the nRF24L01 transceiver
RF24 radio(7, 8); // using pin 7 for the CE pin, and pin 8 for the CSN pin
// Let these addresses be used for the pair
uint8_t address[][6] = {"1Node", "2Node"};
// It is very helpful to think of an address as a path instead of as
// an identifying device destination
// to use different addresses on a pair of radios, we need a variable to
// uniquely identify which address this radio will use to transmit
bool radioNumber = 1; // 0 uses address[0] to transmit, 1 uses address[1] to transmit
// Used to control whether this node is sending or receiving
bool role = false; // true = TX role(send), false = RX role(receive)
// For this example, we'll be using a payload containing
// a single float number that will be incremented
// on every successful transmission
float payload = 0.0;
void setup() {
Serial.begin(115200);
while (!Serial) {
// some boards need to wait to ensure access to serial over USB
}
// initialize the transceiver on the SPI bus
if (!radio.begin()) {
Serial.println(F("radio hardware is not responding!!"));
while (1) {} // hold in infinite loop
}
// print example's introductory prompt
Serial.println(F("RF24/examples/GettingStarted"));
// To set the radioNumber via the Serial monitor on startup
Serial.println(F("Which radio is this? Enter '0' or '1'. Defaults to '0'"));
while (!Serial.available()) {
// wait for user input
}
char input = Serial.parseInt();
radioNumber = input == 1;
Serial.print(F("radioNumber = "));
Serial.println((int)radioNumber);
// role variable is hardcoded to RX behavior, inform the user of this
Serial.println(F("*** PRESS 'T' to begin transmitting to the other node"));
// Set the PA Level low to try preventing power supply related problems
// because these examples are likely run with nodes in close proximity to
// each other.
radio.setPALevel(RF24_PA_LOW); // RF24_PA_MAX is default.
// save on transmission time by setting the radio to only transmit the
// number of bytes we need to transmit a float
radio.setPayloadSize(sizeof(payload)); // float datatype occupies 4 bytes
// set the TX address of the RX node into the TX pipe
radio.openWritingPipe(address[radioNumber]); // always uses pipe 0
// set the RX address of the TX node into a RX pipe
radio.openReadingPipe(1, address[!radioNumber]); // using pipe 1
// additional setup specific to the node's role
if (role) {
radio.stopListening(); // put radio in TX mode
} else {
radio.startListening(); // put radio in RX mode
}
// For debugging info
// printf_begin(); // needed only once for printing details
// radio.printDetails(); // (smaller) function that prints raw register values
// radio.printPrettyDetails(); // (larger) function that prints human readable data
} // setup
void loop() {
if (role) {
// This device is a TX node
unsigned long start_timer = micros(); // start the timer
bool report = radio.write(&payload, sizeof(float)); // transmit & save the report
unsigned long end_timer = micros(); // end the timer
if (report) {
Serial.print(F("Transmission successful! ")); // payload was delivered
Serial.print(F("Time to transmit = "));
Serial.print(end_timer - start_timer); // print the timer result
Serial.print(F(" us. Sent: "));
Serial.println(payload); // print payload sent
payload += 0.01; // increment float payload
} else {
Serial.println(F("Transmission failed or timed out")); // payload was not delivered
}
// to make this example readable in the serial monitor
delay(1000); // slow transmissions down by 1 second
} else {
// This device is a RX node
uint8_t pipe;
if (radio.available(&pipe)) { // is there a payload? get the pipe number that recieved it
uint8_t bytes = radio.getPayloadSize(); // get the size of the payload
radio.read(&payload, bytes); // fetch payload from FIFO
Serial.print(F("Received "));
Serial.print(bytes); // print the size of the payload
Serial.print(F(" bytes on pipe "));
Serial.print(pipe); // print the pipe number
Serial.print(F(": "));
Serial.println(payload); // print the payload's value
}
} // role
if (Serial.available()) {
// change the role via the serial monitor
char c = toupper(Serial.read());
if (c == 'T' && !role) {
// Become the TX node
role = true;
Serial.println(F("*** CHANGING TO TRANSMIT ROLE -- PRESS 'R' TO SWITCH BACK"));
radio.stopListening();
} else if (c == 'R' && role) {
// Become the RX node
role = false;
Serial.println(F("*** CHANGING TO RECEIVE ROLE -- PRESS 'T' TO SWITCH BACK"));
radio.startListening();
}
}
} // loop

复制代码

我使用的是Arduino UNO，运行结果只显示:radio hardware is not responding!!
也就是说the MCU failed to communicate with the radio hardware(引用RF24库文档）
连线方面我是将NRF24L01模块的GND连接Arduino板的GND，VCC连接3.3V（5V我也试了也不行），CE连接管脚7，CSN连接管脚8
请问我这问题可能出在哪呢？

frankhan747 · 发表于 2021-9-4 00:16

别一上来就整这么多复杂的玩意，这样只会把自己玩死。
NRF24L01故障排查-思路方法汇总
https://www.arduino.cn/forum.php ... &fromuid=179950
(出处: Arduino中文社区)

路人甲、 · 发表于 2021-9-4 12:53

frankhan747 发表于 2021-9-4 00:16
别一上来就整这么多复杂的玩意，这样只会把自己玩死。
NRF24L01故障排查-思路方法汇总
https://www.arduino ...

我是用这里的程序有一样的问题，从最开始的begin()函数就返回false

frankhan747 · 发表于 2021-9-5 07:03

路人甲、发表于 2021-9-4 12:53
我是用这里的程序有一样的问题，从最开始的begin()函数就返回false

begin()函数返回false，说明你的nRF芯片根本无法和主控交互，完全就是坏的。建议直接找卖家对线
如果卖家不退货也不换货，建议挂出来以便后来者避坑

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