Nano project not working correctly when using external power ..
I have an issue when running my project on an external power source rather than a USB connection, I’ve read a number of threads regarding his but have failed to resolve the issue.
Project : Controlling rol-down-shutter by sending SMS commands.
Herefore y use a SIM800L EVB (send/receive SMS commands), an Arduino Nano V3.0 as microcontroller and the Arduino 5V relais modules.
Powered by an external source and voltage input regulated by a LM 2596 DC-DC Step down converter.
The sms stuctures are "Up,12" "Down,12" "Status", where the number 12 is an indicator time in seconds how long the motor will turn.
The program is working without any problems when the project is connected with the USB serialcontroller of my computer and the external 5V regulated power connected to the 5V pin !
When I disconnect the Serial USB line with the computer, the project is still running without any problems on the connected external power.
But then comes the problem, when I disconect (or disconnection by power failure) the external power and reconnect the external power,
the NANO doesn't funtion correctly, like there is a rebooting problem ! The SIM800L connect to the network (receiving /send sms indicated activities) and the power LED on the Nano is working.
But there is no reaction on the Nano when receiving SMS from the Sim800L
After pushing the Reset Button on the Nano, it restart and everything works again normal!!!
There is some kind of rebooting problem with the Nano !
When I connect the Nano to the USB rather than the stepped-up battery supply, there is no issue, all the elements work as expected.
But powered only by external power source it doesn't boot or reboot (due to power failure or interrupt), I have to reboot by the Reset Button !
I have posted the code and circuit layout picture below (To make it simple only one relais on the picture).
I hope I have included enough detail but am happy to supply further information if required. Thanks in advance for your help and suggestions.
Greetings
/*
SMS LED STURING V3
https://github.com/ahmadlogs/arduino-ide-examples/blob/main/sim800l-registered-phone/sim800l-registered-phone.ino
Wiring Guide
============
GSM Module > Sim800 L EVB
Tx Pin > 2 Pin
Rx Pin > 3 Pin
Gnd Pin > Gnd Pin
Vcc Pin > 5V (Power supply should be 2A !!! )
Including Send SMS response based on Status rol-down-shutter
Device 1 > 10
Device 1 > 11
Commands: UP,xx // DOWN,xx // STATUS // OK (delete received sms) xx= sec
*/
#include <SoftwareSerial.h>
//GSM Module TX is connected to Arduino D8
#define SIM800_TX_PIN 2
//GSM Module RX is connected to Arduino D9
#define SIM800_RX_PIN 3
SoftwareSerial mySerial(SIM800_TX_PIN, SIM800_RX_PIN); //Create software serial object to communicate with GSM Module
int device_1 = 10; // attach pin D13 of Arduino to Device-1
int device_2 = 11; // attach pin D13 of Arduino to Device-2
// defines variables
int index = 0;
String number = "";
String message = "";
String response = "";
String Cmd = "";
char incomingByte;
String incomingData;
bool atCommand = true;
String TestSignaal = "";
int dTMax = 18; Max allowed movement time rrol-down-shutter
String Msg;
String MsgAction;
String SendStatus;
int n; //plaats van ","
int dT; //MoveTime int Movement Time rol-down-shutter
int StatusdT;
String MoveTime;
bool Status; // rol-down-shutter Up = true rol-down-shutter Down = false
bool MotMk; //rol-down-shutter motor in action Marker
bool MotStop; //rol-down-shutter motor Stop Marker
const String Phone = "+32xxxxxxxxxx";
unsigned long StartTime; // StartTime rol-down-shutter motor
unsigned long Time;
//------------------------------------------------------------------------------------------------------------
void setup()
{
Serial.begin(9600); // Serial Communication for Serial Monitor is starting with 9600 of baudrate speed
mySerial.begin(9600); // Serial Communication for GSM Module is starting with 9600 of baudrate speed
Serial.println("SMS LED STURING V3");
Serial.println("------------------");
pinMode(device_1, OUTPUT); //Sets the device_1 as an OUTPUT
pinMode(device_2, OUTPUT); //Sets the device_2 as an OUTPUT
digitalWrite(device_1, HIGH); //Sets the device_1 in to OFF state at the beginning
digitalWrite(device_2, HIGH); //Sets the device_2 in to OFF state at the beginning
// Check if you're currently connected to SIM800L
while (!mySerial.available()) {
mySerial.println("AT");
delay(1000);
Serial.println("connecting....");
}
Serial.println("Connected..");
mySerial.println("AT+CMGF=1"); //Set SMS Text Mode
delay(1000);
mySerial.println("AT+CNMI=1,2,0,0,0"); //procedure, how to receive messages from the network
delay(1000);
mySerial.println("AT+CMGL=\"REC UNREAD\""); // Read unread messages
Serial.println("Ready to received Commands..");
} // Einde SETUP
//--------------------------------------------------------------------------------------------------------
void loop()
{
if (mySerial.available()) {
delay(100);
// Serial buffer
while (mySerial.available()) {
incomingByte = mySerial.read();
incomingData += incomingByte;
}
delay(10);
if (atCommand == false) {
receivedMessage(incomingData);
Serial.println("Incoming Data = " +incomingData);
}
else {
atCommand = false;
}
//delete messages to save memory !!!
if (incomingData.indexOf("OK") == -1) {
mySerial.println("AT+CMGDA=\"DEL ALL\"");
delay(1000);
atCommand = true;
}
incomingData = "";
}
// Procedure Stop Motor x seconds after StartTime send sms as response in var Status
if ((MotMk == true) && ((millis() - StartTime) > (dT*1000)) ) {
Serial.println("Stopaktie");
//MotMk = true;MotStop = true;
//Serial.print("StopTime = ");Serial.println(millis());
Serial.print("dT = ");Serial.println(dT);
MotMk = false;
digitalWrite(device_1, HIGH);
digitalWrite(device_2, HIGH);
if (Status == true) {
response = "Rolluik OP uitgevoerd";
Serial.println(response);}
else {
response = "Rolluik NEER uitgevoerd";
Serial.println(response);
}
SendSMS(response);
}
delay(1000);
} //Einde Loop
//------------------------------------------------------------------------
// Funties
void receivedMessage(String inputString) {
//1. Get The number of the sender
index = inputString.indexOf('"') + 1;
inputString = inputString.substring(index);
index = inputString.indexOf('"');
number = inputString.substring(0, index);
Serial.println("Number: " + number);
//2.Get The Message of the sender
index = inputString.indexOf("\n") + 1;
message = inputString.substring(index);
message.trim();
Serial.println("Message: " + message);
message.toUpperCase(); // uppercase the message received
Analyse(message); //Analyse(Incoming Signal SMS);
//turn Device 1 ON
if (message.indexOf("UP") > -1) {
digitalWrite(device_1, LOW);
digitalWrite(device_2, HIGH);
StartTime = millis();
Status = true;
MotMk = true;
Serial.print("Status = ");
Serial.println(Status);
delay(1000);
Serial.println("Command: Device 1 Turn On.");
}
//turn Device 2 ON
if (message.indexOf("DOWN") > -1) {
digitalWrite(device_2, LOW);
digitalWrite(device_1, HIGH);
StartTime = millis();
Status = false;
MotMk = true;
Serial.print("Status = ");
Serial.println(Status);
// Serial.print("Waarde StartTime = ");
// Serial.println(StartTime);
delay(1000);
Serial.println("Command: Device 2 Turn On.");
}
delay(50);// Added delay between two readings
if (message.indexOf("STATUS") > -1) {if (Status == false) {
Serial.println(StatusdT);
SendStatus = "Rolluik Dicht,";
SendStatus.concat(StatusdT);
Serial.println(SendStatus);
}
if (Status == true) {
Serial.println(StatusdT);
SendStatus = "Rolluik Open,";
SendStatus.concat(StatusdT);
Serial.println(SendStatus);
}
}
} // Einde Received Message
//-------------------------------------------------------------------------------
void Analyse(String message){
Serial.println("Fie Analyse ");
Serial.println("------------");
//Serial.println("Analyse TestSignaal");
//Serial.print("TestSignaal is ");
Msg = message;
//Serial.print("dTMax = ");
//Serial.println(dTMax);
//Serial.print("Msg = ");
//Serial.println(Msg);
n = Msg.indexOf(",");
MsgAction = Msg.substring(0,n);
//Serial.print("MsgAction = ");
//Serial.println(MsgAction);
MoveTime = Msg.substring(n+1);
dT = MoveTime.toInt();
if (dT > dTMax) {
dT = dTMax;
StatusdT = dT; }
Serial.print("MoveTime = ");
Serial.println(MoveTime);
Serial.print("dT = ");
Serial.println(dT);
//Serial.println("------------");
Serial.println("------------");
} //Einde Analyse
//-------------------------------------------------------------------
void SendSMS(String response){
Serial.println("Fie Send SMS ");
Serial.println("-------------");
mySerial.print("AT+CMGF=1\r");
delay(1000);
mySerial.println("AT+CMGS=\""+Phone+"\"\r");
delay(1000);
mySerial.print(response); //text content
delay(100);
mySerial.write(0x1A);//ascii code for ctrl-26 //sim800.println((char)26); //ascii code for ctrl-26
delay(1000);
Serial.println("SMS Sent Successfully.");
}
typ of plak hier code
