我有一个Raspberry Pi作为WiFi热点和Arduino Uno尝试使用ESP8266模块从中获取数据。
这是我的Arduino接收器代码:
#include <SoftwareSerial.h>
#include <SerialESP8266wifi.h>
#define sw_serial_rx_pin 4 // Connect this pin to TX on the esp8266
#define sw_serial_tx_pin 6 // Connect this pin to RX on the esp8266
#define esp8266_reset_pin 5 // Connect this pin to CH_PD on the esp8266, not reset. (let reset be unconnected)
SoftwareSerial swSerial(sw_serial_rx_pin, sw_serial_tx_pin);
// the last parameter sets the local echo option for the ESP8266 module..
SerialESP8266wifi wifi(swSerial, swSerial, esp8266_reset_pin, Serial);//adding Serial enabled local echo and wifi debug
String inputString;
boolean stringComplete = false;
unsigned long nextPing = 0;
void setup() {
inputString.reserve(20);
swSerial.begin(9600);
Serial.begin(9600);
while (!Serial)
;
Serial.println("Starting wifi");
wifi.setTransportToTCP();// this is also default
// wifi.setTransportToUDP();//Will use UDP when connecting to server, default is TCP
wifi.endSendWithNewline(true); // Will end all transmissions with a newline and carriage return ie println.. default is true
wifi.begin();
wifi.connectToAP("RPi", "raspberry");
wifi.connectToServer("192.168.50.1", "1234");
wifi.send(SERVER, "ESP8266 test app started");
}
void loop() {
//Make sure the esp8266 is started..
if (!wifi.isStarted())
wifi.begin();
//Send what you typed in the arduino console to the server
static char buf[20];
if (stringComplete) {
inputString.toCharArray(buf, sizeof buf);
wifi.send(SERVER, buf);
inputString = "";
stringComplete = false;
}
//Send a ping once in a while..
if (millis() > nextPing) {
wifi.send(SERVER, "Ping ping..");
nextPing = millis() + 10000;
}
//Listen for incoming messages and echo back, will wait until a message is received, or max 6000ms..
WifiMessage in = wifi.listenForIncomingMessage(6000);
if (in.hasData) {
if (in.channel == SERVER)
Serial.println("Message from the server:");
else
Serial.println("Message a local client:");
Serial.println(in.message);
//Echo back;
wifi.send(in.channel, "Echo:", false);
wifi.send(in.channel, in.message);
nextPing = millis() + 10000;
}
//If you want do disconnect from the server use:
// wifi.disconnectFromServer();
}
//Listen for serial input from the console
void serialEvent() {
while (Serial.available()) {
char inChar = (char)Serial.read();
inputString += inChar;
if (inChar == '\n') {
stringComplete = true;
}
}
}
执行时,串口监视器显示:
OKARFaC⸮C⸮j⸮H⸮AT+ AWJAP =&#34; RPi&#34;,#raspberry&#34; WIFI断开WIFI 连接的WIFI GOT IP
OK AT + CIFSR
+ CIFSR:STAIP,&#34; 192.168.50.13&#34; + CIFQR:STAMAC,&#34;图2c:图3a:吃+ CIPSTART = 4&#34; TCP&#34;&#34; 192.0n8.50.1&#34;,121升
链接类型错误
Raspberry Pi的ISC DHCP服务器:
wlan0:STA 2c:3a:e8:4e:bf:70 RADIUS:开始计费会话 5A3B2C85-000000E9 wlan0:STA 2c:3a:e8:4e:bf:70 WPA:成对密钥 握手完成(RSN)
我也提到this SO thread没有运气。
答案 0 :(得分:1)
一些假设,因为您没有提供以下信息:
Arduino IDE> = 1.85
ESP8266社区软件包> = 2.41
具有最新AT固件的ESP模块ESP8266-12E
如果是这种情况,并且这些片段(用 X X 括起来)不是错别字
+ CIFQR:STAMAC,“ 2c:3a:e X AT + CIPSTART = 4,” TCP“,” 192.0 X n X 8.50.1“,121l
这需要检查以下几点
//Make sure the esp8266 is started.. if (!wifi.isStarted()) wifi.begin(); //Send what you typed in the arduino console to the server static char buf[20];
nextPing = millis() + 10000;
末尾
if (in.hasData) {
可能会导致交流中断
由于代码处理的原因,这可能会在不需要的地方触发