大家好，
我有一个项目，每个事件都有时间戳，时间戳被添加到短信中并发送记录。我已经能够从SIM800L调制解调器中检索时间，当我执行以下操作时：
int时间=sim800l.print("AT+CCCLK？\r"(；Serial.println(时间(；
然后，时间以检索到的格式打印，并正确显示在串行监视器中。然而，当我尝试强制转换/解析时，检索到的只是个位数9。基本上，目标是得到这个"；20/11/02，05:58:59+08"；，或者它的一个子集到字符串中，这将允许我将其添加到SMS中。
我的完整代码如下：
#include <SoftwareSerial.h>
SoftwareSerial sim800l(2, 3); // RX,TX for Arduino and for the module it's TXD RXD, they should be inverted
#define button1 7 //Button pin, on the other pin it's wired with GND
bool button_State; //Button state
String String1 = "Waypoint 1:";
String String2 = "YYMMDD";
void setup()
{
pinMode(button1, INPUT_PULLUP); //The button is always on HIGH level, when pressed it goes LOW
sim800l.begin(9600); //Module baude rate, this is on max, it depends on the version
Serial.begin(9600);
delay(1000);
}
void loop()
{
button_State = digitalRead(button1); //We are constantly reading the button State
if (button_State == LOW) { //And if it's pressed
Serial.println("Button pressed"); //Shows this message on the serial monitor
delay(200); //Small delay to avoid detecting the button press many times
SendSMS(); //And this function is called
}
if (sim800l.available()){ //Displays on the serial monitor if there's a communication from the module
Serial.write(sim800l.read());
}
}
void SendSMS()
{
Serial.println("Sending SMS..."); //Show this message on serial monitor
int time = sim800l.print("AT+CCLK?r");
Serial.println(time);
String tym = String(time); // <- This just rint a 9 to the serial monitor
sim800l.print("AT+CMGF=1r"); //Set the module to SMS mode
delay(100);
sim800l.print("AT+CMGS="+xxxxxxxxxxx"r"); //Your phone number don't forget to include your country code, example +212123456789"
delay(500);
sim800l.print(String1 + String2 + Tym); //This is the text to send to the phone number, don't make it too long or you have to modify the SoftwareSerial buffer
delay(500);
sim800l.print((char)26);// (required according to the datasheet)
delay(500);
sim800l.println();
Serial.println("Text Sent.");
delay(500);
}
请注意，我已经进行了广泛的搜索并尝试了许多代码示例，我只是真的被卡住了。
提前感谢您，非常感谢您的帮助
如果您想要其他格式的日期和时间，请更改GMTTime函数中的代码第65行
#include <SoftwareSerial.h>
const int SimBaudRate = 9600;
const int SerialBaudRate = 9600;
const String String1 = "Waypoint 1: ";
static const uint8_t monthDays[]={31,31,28,31,30,31,30,31,31,30,31,30,31};
SoftwareSerial sim800l(2, 3); // RX,TX for Arduino and for the module it's TXD RXD, they should be inverted
#define button1 7 //Button pin, on the other pin it's wired with GND
bool button_State; //Button state
String GMTDateTime = "";
String localdateTime = "";
String response = "";
String command = "";
int i;
uint8_t leapYear(uint8_t year) {
return (year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0) ? 1 : 0;
}
String GMTTime(String dateTime, float fromGMT) {
uint8_t dt[6];
for (uint8_t i = 0; i < 6; i++) {
dt[i] = dateTime.substring(i * 3, i * 3 + 2).toInt();
}
if (fromGMT > 0) {
uint16_t t = dt[4] + fromGMT * 60;
if (t > 60) {
dt[3] += t / 60;
dt[4] = t % 60;
if (dt[3] > 24) {
dt[2] += 1;
dt[3] -= 24;
uint8_t maxDay = (dt[1] == 2) ? 28 + leapYear(dt[0]) : monthDays[dt[1]];
if (dt[2] > maxDay) {
dt[1] += 1;
dt[2] = 1;
if (dt[1] > 12) {
dt[0] += 1;
dt[1] = 1;
}
}
}
} else dt[4] = t;
} else {
int t = dt[3] * 60 + dt[4] + fromGMT * 60;
if (t < 0) {
dt[2] -= 1;
t += 24 * 60;
if (dt[2] <= 0) {
dt[1] -= 1;
uint8_t maxDay = (dt[1] == 2) ? 28 + leapYear(dt[0]) : monthDays[dt[1]];
dt[2] = maxDay;
if (dt[1] <= 0) {
dt[0] -= 1;
dt[1] = 12;
}
}
}
dt[3] = t / 60;
dt[4] = t % 60;
}
char buffer[17];
sprintf(buffer, "%02d/%02d/%02d,%02d:%02d:%02d", dt[0], dt[1], dt[2], dt[3], dt[4], dt[5]); //<<<<<<< change this line for other datetime format
return String(buffer);
}
void getTime()
{
sim800l.println("AT+CCLK?");
}
void setSMSParam()
{
Serial.println("Set sms parameters"); //Show this message on serial monitor
sim800l.println("AT+CSMP=17,167,0,0");
delay(100);
Serial.println("Set text sms mode"); //Show this message on serial monitor
sim800l.println("AT+CMGF=1"); //Set the module to SMS mode
}
void SendSMS()
{
setSMSParam();
Serial.println("Sending sms ..."); //Show this message on serial monitor
sim800l.println("AT+CMGS="+xxxxxxxxxxxx"r"); //+xxxxxxxxxxxx is Your phone number don't forget to include your country code, example +212123456789"
delay(500);
sim800l.print(String1 + GMTDateTime); //This is the text to send to the phone number, don't make it too long or you have to modify the SoftwareSerial buffer
delay(500);
sim800l.write(26);// (required according to the datasheet)
delay(500);
sim800l.println();
}
void setup()
{
pinMode(button1, INPUT_PULLUP); //The button is always on HIGH level, when pressed it goes LOW
sim800l.begin(SimBaudRate); //Module baude rate, this is on max, it depends on the version
Serial.begin(SerialBaudRate);
delay(1000);
}
void loop()
{
button_State = digitalRead(button1); //We are constantly reading the button State
if (button_State == LOW) { //And if it's pressed
Serial.println("Button pressed"); //Shows this message on the serial monitor
delay(200); //Small delay to avoid detecting the button press many times
getTime(); //And this function is called
}
response = "";
command = "";
while (sim800l.available()) {
char ch = sim800l.read();
response += ch;
}
if ((response != "") && (response != "⸮")) {
//remove rn from first and last of
if (response.startsWith("rn") && response.endsWith("rn")) {
response.remove(0, 2);
response.remove(response.length() - 2, 2);
}
if (response.startsWith("+")) {
i = response.indexOf(':');
command = response.substring(1, i);
response.remove(0, i + 2);
if (command == "CCLK") {
i = response.indexOf('+');
uint8_t dt[6];
localdateTime = response.substring(1,i);
double fromGMT = -response.substring(i, response.lastIndexOf('"')).toInt() / 4.0;
GMTDateTime = GMTTime(localdateTime, fromGMT);
Serial.print("GMT time = "); //Show this message on serial monitor
Serial.println(GMTDateTime);
Serial.print("local time = "); //Show this message on serial monitor
Serial.println(localdateTime);
SendSMS();
} else if (command == "CMGS") {
i = response.substring(0, response.indexOf("r")).toInt();
Serial.printf("SMS sent with code %d", i);
}
} else if (response == "ERROR") {
Serial.println("Error");
}
}
}