我正在使用EPS8266和Arduino Mega。我将字符串通过WiFi传递到EPS8266，然后通过串行链接将它们传递到Mega。如果我使用j，下面的代码可以工作，但是如果我使用Serial.printf()，则会出现以下错误。
错误：重载“ print（uint8_t *＆）”的调用不明确
代码...
Serial.print()非常非常非常奇怪的是#include <ESP8266WiFi.h>
#include <WebSocketsServer.h>
const char* ssid = "SKYNET";
const char* password = "yourdogsmaidenname";
WebSocketsServer webSocket = WebSocketsServer(81);
void webSocketEvent(uint8_t num, WStype_t type, uint8_t * payload, size_t lenght) {
//Serial.printf("[%u] get Message: %s\r\n", num, payload);
switch(type) {
case WStype_DISCONNECTED:
break;
case WStype_CONNECTED:
{
IPAddress ip = webSocket.remoteIP(num);
// Serial.printf("[%u] Connected from %d.%d.%d.%d url: %s\r\n", num, ip[0], ip[1], ip[2], ip[3], payload);
}
break;
case WStype_TEXT:
{
Serial.printf("[%u] get Text: %s\r\n", num, payload);
//Serial.print(payload);
}
break;
case WStype_BIN:
{
hexdump(payload, lenght);
}
// echo data back to browser
webSocket.sendBIN(num, payload, lenght);
break;
}
}
void setup() {
// Set up serial comms
Serial.begin(115200);
// Set up WiFi
WiFi.begin(ssid, password);
while(WiFi.status() != WL_CONNECTED) {
delay(200);
}
Serial.println(WiFi.localIP());
delay(500);
// Set up web socket
webSocket.begin();
webSocket.onEvent(webSocketEvent);
}
void loop() {
webSocket.loop();
}
今天早上工作正常。那么为什么这是个问题呢？