I am using A9G with ESP32, using below code but as you can see the serial monitor, the HTTP response takes long time to load even I have reduced the delay, command sent at 16:24:20 and response received at 16:24:36. Also, is it possible to remove http headers from the response to get actual payload only.
#include <HardwareSerial.h>
#define DEBUG true
#define BAUD_RATE 115200
#include<stdio.h>
#include <ArduinoJson.h>
#define A9G_SIZE_RX 1024 // used in A9G.setRxBufferSize()
#define data_BUFFER_LENGTH 1024
/***********************************/
#define A9G_PON 13 //ESP12 GPIO16 A9/A9G POWON
#define A9G_POFF 12 //ESP12 GPIO15 A9/A9G POWOFF
#define A9G_WAKE 27 //ESP12 GPIO13 A9/A9G WAKE
#define A9G_LOWP 14 //ESP12 GPIO2 A9/A9G ENTER LOW POWER MODULE
int A9GPOWERON();
String response = "";
HardwareSerial A9G(1);
void setup() {
Serial.begin(115200); /* Define baud rate for A9G communication */
A9G.begin(9600, SERIAL_8N1, 35, 32); // RX and TX of ES32
A9G.setRxBufferSize(A9G_SIZE_RX);
Serial.println("\nA9G Test Started...");
for (char ch = ' '; ch <= 'z'; ch++) {
A9G.write(ch);
}
A9G.println("");
delay(500);
// sendData("AT+RST=1", 1000, DEBUG); //Software reset
// delay(500);
/************************************/
pinMode(A9G_PON, OUTPUT);//LOW LEVEL ACTIVE
pinMode(A9G_POFF, OUTPUT);//HIGH LEVEL ACTIVE
pinMode(A9G_LOWP, OUTPUT);//LOW LEVEL ACTIVE
digitalWrite(A9G_PON, HIGH); // Keep A9G OFF(HIGH) initially
digitalWrite(A9G_POFF, LOW);
digitalWrite(A9G_LOWP, HIGH);
Serial.println("Turning ON A9G...");
Serial.println();
if (A9GPOWERON() == 1)
{
Serial.println("A9G POWER ON.");
Serial.println();
}
sendData("ATE0", 1000, DEBUG);
sendData("AT+CGSN", 3000, DEBUG); //IMEI No.
sendData("AT+CREG?", 3000, DEBUG);
sendData("AT+CSQ", 1000, DEBUG);
sendData("AT+CMGF=1", 1000, DEBUG);
sendData("AT+CPMS=\"SM\",\"SM\",\"SM\"", 1000, DEBUG);
// sendData("AT+CMGDA=\"DEL ALL\"", 1000, DEBUG); //Delete All Messages
sendData("AT+CGATT=1", 3000, DEBUG); //Attach network, this command is necessary if the Internet is needed.
sendData("AT+CGDCONT=1,\"IP\",\"CITMOI\"", 1000, DEBUG); //Set PDP parameter
sendData("AT+CGACT=1,1", 3000, DEBUG); //Activate PDP, can access to Internet when activated properly
sendData("AT+CIFSR", 1000, DEBUG);
sendData("AT+GPS=1", 1000, DEBUG);
sendData("AT+GPNT=1", 500, DEBUG); //Set the status of GPS light
sendData("AT+LOCATION=2", 500, DEBUG); //1:Get base address, 2:get gps address
sendData("AT+CCLK?", 500, DEBUG);
sendData("AT+CCLK?", 500, DEBUG);
}
void loop() {
// while (A9G.available() > 0) {
// A9G.write(A9G.read());
//// yield();
// }
// while (A9G.available() > 0) {
// A9G.write(A9G.read());
// // yield();
// }
//****For Sending Data to MySQL****
// String cmdString = "AT+HTTPGET=\"https://apk.vehtechs.com/api/imei-update-info?imei=123456789012345&lat=11.11&lng=22.22&speed=100&wifi_ssid1=ABC5GHz&wifi_ssid2=ABC5GHz&wifi_ssid3=ABC5GHz&wifi_ssid4=ABC5GHz&wifi_connected=1&gyro=1&battery=1&fuel=100&door1=1&door2=1&door3=0&door4=1\"";
//****For Receivng Data from MySQL****
String cmdString = "AT+HTTPGET=\"http://apk.vehtechs.com/api/imei?imei=123456789456789\"";
String input = sendData(cmdString, 500, DEBUG);
StaticJsonDocument<512> doc;
DeserializationError error = deserializeJson(doc, input);
if (error) {
Serial.print("deserializeJson() failed: ");
Serial.println(error.c_str());
//return;
}
else{
const char* isArm = doc["isArm"]; // "1"
const char* wifi = doc["wifi"]; // "0"
const char* wifi_password = doc["wifi_password"]; // nullptr
const char* wifi_connssid = doc["wifi_connssid"]; // "0"
int wifi_disconnect = doc["wifi_disconnect"]; // 0
const char* wifi_disc_name = doc["wifi_disc_name"]; // nullptr
int engine = doc["engine"]; // 1
const char* phoneNumber = doc["phoneNumber"]; // "542351685"
const char* number1 = doc["number1"]; // nullptr
const char* number2 = doc["number2"]; // nullptr
const char* number3 = doc["number3"]; // nullptr
const char* number4 = doc["number4"]; // nullptr
const char* number5 = doc["number5"]; // nullptr
const char* gyro = doc["gyro"]; // "0"
const char* gps = doc["gps"]; // "1"
const char* powerSupply = doc["powerSupply"]; // "1"
const char* plateNo = doc["plateNo"]; // "32568"
Serial.print("isArm= ");
Serial.println(isArm);
Serial.print("wifi= ");
Serial.println(wifi);
Serial.print("wifi_password= ");
Serial.println(wifi_password);
Serial.print("wifi_connssid= ");
Serial.println(wifi_connssid);
Serial.print("wifi_disconnect= ");
Serial.println(wifi_disconnect);
Serial.print("wifi_disc_name= ");
Serial.println(wifi_disc_name);
Serial.print("engine= ");
Serial.println(engine);
Serial.print("phoneNumber= ");
Serial.println(phoneNumber);
Serial.print("number1= ");
Serial.println(number1);
Serial.print("number2= ");
Serial.println(number2);
Serial.print("number3= ");
Serial.println(number3);
Serial.print("number4= ");
Serial.println(number4);
Serial.print("number5= ");
Serial.println(number5);
Serial.print("gyro= ");
Serial.println(gyro);
Serial.print("gps= ");
Serial.println(gps);
Serial.print("powerSupply= ");
Serial.println(powerSupply);
Serial.print("plateNo= ");
Serial.println(plateNo);
Serial.println();
Serial.println();
Serial.println();
}
delay(500);
}
String sendData(String command, const int timeout, boolean debug)
{
String response = "";
Serial.print("Command Sent: "); Serial.println(command);
A9G.println(command);
unsigned long time = millis();
while (A9G.available() == 0) {}
while (A9G.available())
{
char c = A9G.read();
response += c;
//Serial.print(c);
delay(10);
}
if (debug)
{
Serial.print("A9G Response: ");
Serial.println(response);
}
if (response.indexOf('{') > 0) {
int l = response.indexOf('{');
String res = response.substring(l);
Serial.println(res);
response = res;
}
return response;
}
int A9GPOWERON() //Send Command to A9G to Turn ON
{
digitalWrite(A9G_PON, LOW);
delay(3000);
digitalWrite(A9G_PON, HIGH);
delay(5000);
String msg = String("");
label:
msg = sendData("AT", 2000, DEBUG);
if ( msg.indexOf("OK") >= 0 ) {
Serial.println("GET OK");
Serial.println();
return 1;
}
else {
Serial.println("NOT GET OK");
Serial.println();
goto label; //If NOT GET OK GOTO label
return 0;
}
}
See