我正在尝试通过ESP-01进行两个Arduino的对话，它们仅需要发送简单的数字数据，但发送速率约为每秒10次。
为此，我不想使用任何库，所以我只想使用AT命令。
服务器工作正常，但是（我可以连接手机），但是第二个Arduino无法读取数据。
到目前为止，我有以下代码：
这是我的“服务器”代码
byte ledstatus = 0;
byte connectionId;
long int timeout = 2000; //aantal msec die de controller wacht op een reactie van de ESP01 module alvorens verder te gaan.
#define DEBUG true
void setup() {
Serial.begin(115200); //Seriële monitor starten
Serial1.begin(115200); //Seriële communicatie met ESP01 Baud rate standaard 115200
delay(5000); // This gives enough time to open the monitor
Serial.println("Starting");
sendData("AT+RST\r\n", 2000, DEBUG); // reset ESP01 module
Serial.println("RST");
sendData("AT+GMR\r\n", 2000, DEBUG); // check de versie info van de firmware in de ESP01 module
Serial.println("GMR");
sendData("AT+CWMODE_CUR=2\r\n", 1000, DEBUG); //2= SoftAP mode
Serial.println("CWMODE_CUR");
sendData("AT+CWSAP_CUR=\"TimJager_GIP\",\"SuperPassword\",5,4\r\n", 10000, DEBUG); //SSID (naam SoftAP) aanmaken, WIFI wachtwoord, kanaal 5 en beveiliging WPA & WPA2
Serial.println("CWSAP_CUR");
sendData("AT+CWDHCP_CUR=0,1\r\n", 1000, DEBUG); //enable DHCP in SoftAP en client mode
Serial.println("CWDHCP_CUR");
sendData("AT+CIPMUX=1\r\n", 1000, DEBUG); // configure for multiple connections
Serial.println("CIPMUX");
sendData("AT+CIPSERVER=1,80\r\n", 1000, DEBUG); // turn on server on port 80, werkt alleen als CIPMUX=1
Serial.println("CIPSERVER");
sendData("AT+CIPAPMAC_CUR?\r\n", 1000, DEBUG); //wat is het mac adres van de esp?
Serial.println("CIPAPMAC_CUR");
sendData("AT+CIPAP_CUR?\r\n", 1000, DEBUG); //toon huidig IP-adres van de ESP
Serial.println("CIPAP_CUR");
sendData("AT+CWLIF\r\n", 1000, DEBUG); //toon verbonden clients
Serial.println("CWLIF");
}
float readAndMapAnalog(uint8_t pin, float in_min, float in_max, float out_min, float out_max) {
return (analogRead(pin) - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}
void loop() {
if (Serial1.available()) { //If there is incoming data from web browser to toggle led
if (Serial1.find("+IPD,")) { //If the incoming data from ISP01 has the instruction "IPD" - form incoming message: (+CIPMUX=1)+IPD,<link ID>,<len>[,<remote IP>,<remote port>]:<data>
Serial.println("Request ok\nRecieving data from web browser"); // display this on serial monitor
connectionId = Serial.parseInt(); //get the link id. paseInt converts characters to numbers. We need the link ID to be able to close the correct connection
Serial1.flush(); // Waits for the transmission of outgoing serial data to complete.
Serial.println("HTML verzenden"); // display this on serial monitor
//send data from BBAVR & ESP01 (Server side) to the webbrowser (Client side)
int measurement = readAndMapAnalog(A0, 0, 1023, 0, 1023); // Get the value of the flex sensor and show it on the page
int contentLength = String(measurement).length(); // we need to also send the data lenght that we calculate here
//response http header
espsend("HTTP/1.0 200 OK \r\nContent-Length:" + (String)contentLength + "\r\nContent-Type: text/html; charset=utf-8\r\nConnection: close\r\n\r\n");
espsend(String(measurement));
//close connection
String closeCommand = "AT+CIPCLOSE="; //close the socket connection esp command
closeCommand += connectionId; // append connection id
closeCommand += "\r\n";
sendData(closeCommand, 1000, DEBUG); //timeout was standaard 3000
}
}
}
//FUNCTION : Send data from ESP01 to a client (webbrowser)
void espsend(String d)
{
String cipSend = " AT+CIPSEND="; // ESP01 Message format: "AT+CIPSEND=<link ID>,<length>"
cipSend += connectionId;
cipSend += ",";
cipSend += d.length(); // get the length of string d
cipSend += "\r\n"; // begin new line
sendData(cipSend, 500, DEBUG); // Timeout was standaard 1000
sendData(d, 500, DEBUG); // timeout was standaard 1000
}
//FUNCTION : Send data from BBAVR to ESP01 and wait certain time for a response. Display response on serial monitor.
void sendData(String command, const int timeout, boolean debug)
{
// FIRST we send the command to the ESP01 module with these lines
String response = ""; // declare a string with the name response and empty it.
Serial1.flush(); // Waits for the transmission of outgoing serial data to complete.
Serial1.print(command); // send the command to the ESP01 module
long int timenow = millis(); // get teh number of msec since the start of the program and put it in var "timenow"
byte end = 0;
// SECOND we wait for a response message of the ESP01 module
while ( (timenow + timeout) > millis()) // stay in this loop for a number of msec set bij 'timeout' value at the start of the program
{
while (Serial1.available()) // loop as long as there is data in the serial receive buffer
{
char c = Serial1.read(); // read the next character.
response += c; // add the last character to the response string
}
}
if (debug) // if debug is set to 1 - the response is printed on the serial monitor
{
Serial.print(response); //displays the esp response messages in arduino Serial monitor
delay(100);
}
}
另外，我将此作为客户端代码：
// ESP stuff
byte connectionId; // The id of the WiFi connection
//long int timeout = 2000; // The ammount of ms that the µC will wait for a reaction from the ESP-01 module before it will continue
#define DEBUG true
#define WifiAP 2 //1: thuis //2: school //3: preventie
#define firmware 2 //1:before 2017-05 //2:from 2017-05, for connecting to the wifi network
#if WifiAP==2
String ssid = "TimJager_GIP"; // Hoofdlettergevoelig, SSID van het Wifi netwerk waarin de module nu zit
String password = "SuperPassword"; // Hoofdlettergevoelig, paswoord van het huidige Wifi netwerk
#endif
String server = "192.168.4.1"; // moet correct zijn voor onze server
String uri = "/jq/status3.php"; // moet correct zijn voor onze server
String data; // in deze string wordt het te verzenden bericht opgebouwd
String response; // in deze string komt het bericht dat je ontvangt van de server
const int timeout = 5000; //timeout http request - als we niets vernemen binnen deze tijd gaan we door
unsigned int VAR1 = 0; // variabele 1 die wordt verzonden naar de cloudserver
unsigned int VAR2 = 0; // variabele 2 die wordt verzonden naar de cloudserver
void setup()
{
Serial.begin(115200); // Start the serial communication
Serial1.begin(115200); // Serial communication with the ESP-01 (Baud rate standaard 115200)
/*while (Serial.available() == 0); // Wait for data
while (Serial.available() != 0) Serial.read(); // Clear the buffer*/
Serial.println("Starting ESP");
sendData("AT+RST\r\n", 2000, DEBUG); // Reset ESP01 module
Serial.println("RST");
sendData("AT+GMR\r\n", 2000, DEBUG); // Check the version of the firmware in the ESP-01 module
Serial.println("GMR");
/*sendData("\r\n", 2000, DEBUG); // Check the version of the firmware in the ESP-01 module
Serial.println("");*/
sendData("AT+CWMODE_CUR=3\r\n", 2000, DEBUG); // Check the version of the firmware in the ESP-01 module
Serial.println("AT+CWMODE_CUR=3");
sendData("AT+CWJAP_CUR=\"" + ssid + "\",\"" + password + "\"\r\n", 20000, DEBUG); // Check the version of the firmware in the ESP-01 module
Serial.println("AT+CWJAP_CUR=\"" + ssid + "\",\"" + password + "\"");
sendData("AT+CIFSR\r\n", 20000, DEBUG); // Check the version of the firmware in the ESP-01 module
Serial.println("AT+CIFSR");
sendData("AT+CIPSTART=\"TCP\",\"" + server + "\",80\r\n", 20000, DEBUG); // Check the version of the firmware in the ESP-01 module
Serial.println("AT+CIPSTART=\"TCP\",\"" + server + "\",80\r\n");
sendData("AT+CIPSEND=4\r\n", 20000, DEBUG); // Check the version of the firmware in the ESP-01 module
Serial.println(">test");
/*sendData("\r\n", 2000, DEBUG); // Check the version of the firmware in the ESP-01 module
Serial.println("");
sendData("\r\n", 2000, DEBUG); // Check the version of the firmware in the ESP-01 module
Serial.println("");
sendData("\r\n", 2000, DEBUG); // Check the version of the firmware in the ESP-01 module
Serial.println("");*/
}
void loop() {
}
//FUNCTION : Send data from ESP01 to a client (webbrowser)
void espsend(String d) {
String cipSend = " AT+CIPSEND="; // ESP01 Message format: "AT+CIPSEND=<link ID>,<length>"
cipSend += connectionId;
cipSend += ",";
cipSend += d.length(); // Get the length of string d
cipSend += "\r\n"; // Begin new line
sendData(cipSend, 500, DEBUG); // Timeout was standaard 1000
sendData(d, 500, DEBUG); // Timeout was standaard 1000
}
//FUNCTION : Send data from BBAVR to ESP01 and wait certain time for a response. Display response on serial monitor.
void sendData(String command, const int timeout, boolean debug) {
// FIRST we send the command to the ESP01 module with these lines
String response = ""; // Declare a string with the name response and empty it.
Serial1.flush(); // Waits for the transmission of outgoing serial data to complete.
Serial1.print(command); // Send the command to the ESP01 module
long int timenow = millis(); // Get teh number of msec since the start of the program and put it in var "timenow"
byte end = 0;
// SECOND we wait for a response message of the ESP01 module
while ( (timenow + timeout) > millis()) // Stay in this loop for a number of msec set bij 'timeout' value at the start of the program
{
while (Serial1.available()) // Loop as long as there is data in the serial receive buffer
{
char c = Serial1.read(); // Read the next character.
response += c; // Add the last character to the response string
}
}
if (debug) // If debug is set to 1 - the response is printed on the serial monitor
{
Serial.print(response); // Displays the esp response messages in arduino Serial monitor
delay(100);
}
}
很抱歉，如果代码中有任何荷兰注释，我用英语替换了其中的大多数注释，但仍有一些矿石仍是荷兰注释。