Code for greenhouse and upload errors

vampvuire · January 25, 2025, 2:36pm

good evening to the arduino community, please please help

I try to upload my code, but I keep getting smacked with this error message. Using an Arduino Nano, Atmega328P (old bootloader). I was able to upload before on the same Nano, I don't know why it won't work now.

Sketch uses 7048 bytes (22%) of program storage space. Maximum is 30720 bytes.
Global variables use 638 bytes (31%) of dynamic memory, leaving 1410 bytes for local variables. Maximum is 2048 bytes.
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xa0
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0xa0
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0xa0
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0xa0
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0xa0
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0xa0
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0xa0
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0xa0
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0xa0
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0xa0
Failed uploading: uploading error: exit status 1

I've tried reinstalling the IDE, tried updating its CH340 driver (but then already having the most up-to-date one), and tried the Nano's USB to different COM ports of my laptop. No avail to all my attempts.

im sorry if my upload format is wrong, this is my first time

P.S. I would like to upload my code too and explain my project (a mechanized greenhouse), but i'll start with this so it won't be messy, as my code is lengthy. T_T

david_2018 · January 25, 2025, 2:38pm

Have you tried the "old bootloader" option under the Arduino IDE's tools > processor setting?

vampvuire · January 25, 2025, 2:44pm

yes, but it still gives me the prompt:

avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x1d
Failed uploading: uploading error: exit status 1

although the old bootloader option did work before, but it won't presently.

thank you

vampvuire · January 25, 2025, 2:48pm

here is my code

#include <Wire.h>
#include <RTClib.h>

// Pin Definitions
#define RELAY_FAN_PIN 3         // Relay for fan
#define RELAY_WATER_PIN 4       // Relay for water pump
#define RELAY_LIGHT_PIN 5       // Relay for grow light
#define THERMOSTAT_PIN 7         // Pin connected to S1 of the thermostat

// Initialize RTC
RTC_DS3231 rtc;

// Threshold Values
const int LIGHT_ON_HOUR = 8;              // Time to turn grow light ON
const int LIGHT_OFF_HOUR = 20;            // Time to turn grow light OFF
const int WATER_INTERVAL_HOURS = 6;       // Time between watering cycles

// Variables
DateTime lastWatering;

void setup() {
  // Initialize Serial Monitor for debugging
  Serial.begin(9600);

  // Initialize RTC
  if (!rtc.begin()) {
    Serial.println("RTC not found!");
    while (1); // Halt execution if RTC is missing
  }

  if (rtc.lostPower()) {
    Serial.println("RTC lost power, setting default time to 2025-01-01 00:00:00.");
    rtc.adjust(DateTime(2025, 1, 1, 0, 0, 0)); // Set default time
  }

  // Set Relay Pins as Output
  pinMode(RELAY_FAN_PIN, OUTPUT);
  pinMode(RELAY_WATER_PIN, OUTPUT);
  pinMode(RELAY_LIGHT_PIN, OUTPUT);
  pinMode(THERMOSTAT_PIN, INPUT); // Input from thermostat

  // Turn off all relays at the start
  digitalWrite(RELAY_FAN_PIN, HIGH);
  digitalWrite(RELAY_WATER_PIN, HIGH);
  digitalWrite(RELAY_LIGHT_PIN, HIGH);

  // Initialize last watering time
  lastWatering = rtc.now();

  delay(2000); // Wait 2 seconds to finish initialization
}

void loop() {
  // Get current time
  DateTime now = rtc.now();

  // Debug Output to Serial Monitor
  Serial.print("Current Time: ");
  Serial.print(now.hour());
  Serial.print(":");
  Serial.println(now.minute());

  // Control Fan (based on thermostat relay state)
  int thermostatState = digitalRead(THERMOSTAT_PIN); // Check thermostat relay state
  if (thermostatState == HIGH) { // Thermostat relay ON
    digitalWrite(RELAY_FAN_PIN, LOW); // Turn ON fan
    Serial.println("Fan ON - Thermostat triggered");
  } else { // Thermostat relay OFF
    digitalWrite(RELAY_FAN_PIN, HIGH); // Turn OFF fan
    Serial.println("Fan OFF - Thermostat not triggered");
  }

  // Control Grow Light (based on time)
  if (now.hour() >= LIGHT_ON_HOUR && now.hour() < LIGHT_OFF_HOUR) {
    digitalWrite(RELAY_LIGHT_PIN, LOW); // Turn ON grow light
    Serial.println("Grow Light ON");
  } else {
    digitalWrite(RELAY_LIGHT_PIN, HIGH); // Turn OFF grow light
    Serial.println("Grow Light OFF");
  }

  // Control Water Pump (based on schedule)
  if ((now - lastWatering).totalseconds() >= WATER_INTERVAL_HOURS * 3600) {
    digitalWrite(RELAY_WATER_PIN, LOW); // Turn ON water pump
    Serial.println("Water pump ON");
    delay(7000); // Keep the pump ON for 7 seconds (adjust as needed)
    digitalWrite(RELAY_WATER_PIN, HIGH); // Turn OFF water pump
    Serial.println("Water pump OFF");

    // Update last watering time
    lastWatering = now;
  }

  delay(2000); // Wait 2 seconds before next loop
}

and I have the library RTClib by adafruit installed for the DS3231. Only that library verifies without error so that's my only library installed.

camsysca · January 25, 2025, 2:49pm

Your problem is "the most recent version" is flawed. You need to roll back the driver version. Instructions here:

Rollback for CH340

vampvuire · January 25, 2025, 3:08pm

Okay, I updated the CH340 driver to the 2014 one. Tried to upload after but this error occurred still

avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x79
Failed uploading: uploading error: exit status 1

xfpd · January 25, 2025, 3:19pm

Verify your USB cable is wired for data... do you hear a system chime and see Device Manager recognize the insert/removal?

vampvuire · January 25, 2025, 3:30pm

yes, It does chime. My computer recognizes the USB too, as it appears in the device manager.

Could the problem be an underlying one in the hardware (Arduino Nano) itself? I really hope not.

I would upload a simpler test sketch to the Nano to see if it can run at all but i’ll have to see if it even uploads.

xfpd · January 25, 2025, 3:32pm

You have selected your board and port?

camsysca · January 25, 2025, 3:32pm

2014 is really old - I thought I was linking to a thread that would give you a driver from 2020-2022, which I've done and found to be working successfully.

camsysca · January 25, 2025, 3:38pm

Okay. This is the thread I meant to link to:Rollback
Given the error message you're quoting, though, it sounds more like a comms error. You're not perchance connecting anything to pins 0 and 1? Please show us your code.

vampvuire · January 25, 2025, 3:59pm

Nothing is currently connected to my Nano, other than the USB to my computer. I have a lot of defined pins but I removed them from the Nano for the sake of uploading. Here is my code.

#include <Wire.h>
#include <RTClib.h>

// Pin Definitions
#define RELAY_FAN_PIN 3         // Relay for fan
#define RELAY_WATER_PIN 4       // Relay for water pump
#define RELAY_LIGHT_PIN 5       // Relay for grow light
#define THERMOSTAT_PIN 7         // Pin connected to S1 of the thermostat

// Initialize RTC
RTC_DS3231 rtc;

// Threshold Values
const int LIGHT_ON_HOUR = 8;              // Time to turn grow light ON
const int LIGHT_OFF_HOUR = 20;            // Time to turn grow light OFF
const int WATER_INTERVAL_HOURS = 6;       // Time between watering cycles

// Variables
DateTime lastWatering;

void setup() {
  // Initialize Serial Monitor for debugging
  Serial.begin(9600);

  // Initialize RTC
  if (!rtc.begin()) {
    Serial.println("RTC not found!");
    while (1); // Halt execution if RTC is missing
  }

  if (rtc.lostPower()) {
    Serial.println("RTC lost power, setting default time to 2025-01-01 00:00:00.");
    rtc.adjust(DateTime(2025, 1, 1, 0, 0, 0)); // Set default time
  }

  // Set Relay Pins as Output
  pinMode(RELAY_FAN_PIN, OUTPUT);
  pinMode(RELAY_WATER_PIN, OUTPUT);
  pinMode(RELAY_LIGHT_PIN, OUTPUT);
  pinMode(THERMOSTAT_PIN, INPUT); // Input from thermostat

  // Turn off all relays at the start
  digitalWrite(RELAY_FAN_PIN, HIGH);
  digitalWrite(RELAY_WATER_PIN, HIGH);
  digitalWrite(RELAY_LIGHT_PIN, HIGH);

  // Initialize last watering time
  lastWatering = rtc.now();

  delay(2000); // Wait 2 seconds to finish initialization
}

void loop() {
  // Get current time
  DateTime now = rtc.now();

  // Debug Output to Serial Monitor
  Serial.print("Current Time: ");
  Serial.print(now.hour());
  Serial.print(":");
  Serial.println(now.minute());

  // Control Fan (based on thermostat relay state)
  int thermostatState = digitalRead(THERMOSTAT_PIN); // Check thermostat relay state
  if (thermostatState == HIGH) { // Thermostat relay ON
    digitalWrite(RELAY_FAN_PIN, LOW); // Turn ON fan
    Serial.println("Fan ON - Thermostat triggered");
  } else { // Thermostat relay OFF
    digitalWrite(RELAY_FAN_PIN, HIGH); // Turn OFF fan
    Serial.println("Fan OFF - Thermostat not triggered");
  }

  // Control Grow Light (based on time)
  if (now.hour() >= LIGHT_ON_HOUR && now.hour() < LIGHT_OFF_HOUR) {
    digitalWrite(RELAY_LIGHT_PIN, LOW); // Turn ON grow light
    Serial.println("Grow Light ON");
  } else {
    digitalWrite(RELAY_LIGHT_PIN, HIGH); // Turn OFF grow light
    Serial.println("Grow Light OFF");
  }

  // Control Water Pump (based on schedule)
  if ((now - lastWatering).totalseconds() >= WATER_INTERVAL_HOURS * 3600) {
    digitalWrite(RELAY_WATER_PIN, LOW); // Turn ON water pump
    Serial.println("Water pump ON");
    delay(7000); // Keep the pump ON for 7 seconds (adjust as needed)
    digitalWrite(RELAY_WATER_PIN, HIGH); // Turn OFF water pump
    Serial.println("Water pump OFF");

    // Update last watering time
    lastWatering = now;
  }

  delay(2000); // Wait 2 seconds before next loop
}

I'll try the driver, however in the past it uploaded successfully without having to update its CH340... Also, serial monitor is blank despite how the previously uploaded code on it is supposed to atleast display a debug message (ex. "RTC not found!") .

could this be the nano malfunctioning?

vampvuire · January 25, 2025, 4:01pm

yes. COM3, ATmega328P (old, ive tried all other variants but none worked either), Arduino Nano

wildbill · January 25, 2025, 4:17pm

Consider getting another Nano. Obviously it'll help drill into what's causing the problem, but you're bound to need one for another project eventually

xfpd · January 25, 2025, 4:42pm

Any activity on the Nano LEDs when plugged in?
While plugged in, and the RESET is pressed, any Nano LED activity?

sonofcy · January 25, 2025, 4:56pm

Try the blink sketch.

vampvuire · January 25, 2025, 5:05pm

LED for the reset did not flicker at all when I pressed the reset button, only POW stayed on like usual

vampvuire · January 25, 2025, 5:06pm

I tried to upload a really simple sketch to see if the arduino can still run, but it failed and prompted error messages at that too.

xfpd · January 25, 2025, 5:11pm

Try the reset procedure just to see if the board is alive.

vampvuire · January 26, 2025, 4:41am

the Nano was unresponsive when I pushed the reset button, multiple tries and times.

Moreover, the serial monitor is blank despite the board having an uploaded sketch stored in its memory supposedly. could this be a fault in the board’s hardware itself now?

(also rolled back the driver but I got the same error message)

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Code for greenhouse and upload errors

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