POst request Error on OpenMVIDe

Arduino Boards
1

Hi, I am trying to send some data in a form of json as post request to my flask backend.
I keep getting erors. my flask backend is ruuning on local host so i got the url intact and my nicla vision board is connected to wifi.

below is the code and errro I am facing.

import sensor, image, time, os, tf, math, uos, gc, json
import network, urequests
import pyb

# Wi-Fi connection details
SSID = "***"
PASSWORD = "***"

# Initialize the NIC (network interface controller)
nic = network.WLAN(network.STA_IF)
nic.active(True)

# Attempt Wi-Fi connection
nic.connect(SSID, PASSWORD)
timeout = 600  # 2 seconds (20 * 100ms)
while not nic.isconnected() and timeout > 0:
    print("Connecting to Wi-Fi...")
    time.sleep(0.1)
    timeout -= 1

if nic.isconnected():
    print("Connected to Wi-Fi")
    print(nic.ifconfig())  # Print the IP address, subnet mask, gateway, and DNS
else:
    print("Failed to connect to Wi-Fi within 2 seconds.")

sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.set_windowing((240, 240))
sensor.skip_frames(time=2000)

net = None
labels = None
min_confidence = 0.5
ledRed = pyb.LED(1)
ledGreen = pyb.LED(2)

try:
    net = tf.load("trained.tflite", load_to_fb=uos.stat('trained.tflite')[6] > (gc.mem_free() - (64*1024)))
except Exception as e:
    raise Exception('Failed to load "trained.tflite", did you copy the .tflite and labels.txt file onto the mass-storage device? (' + str(e) + ')')

try:
    labels = [line.rstrip('\n') for line in open("labels.txt")]
except Exception as e:
    raise Exception('Failed to load "labels.txt", did you copy the .tflite and labels.txt file onto the mass-storage device? (' + str(e) + ')')

colors = [
    (255, 0, 0),
    (0, 255, 0),
    (255, 255, 0),
    (0, 0, 255),
    (255, 0, 255),
    (0, 255, 255),
    (255, 255, 255),
]

last_five_predictions = []

def send_data_with_retry(data, retry_count=3, delay_seconds=1):
    while retry_count > 0:
        try:
            response = urequests.post('http://127.0.0.1:5000/data', json=data) 
            if response.status_code == 200:
                print("Data sent to backend successfully")
                return True
            else:
                print(f"Failed to send data. Response code: {response.status_code}")
        except Exception as e:
            print(f"Failed to send data: {e}")

        time.sleep(delay_seconds)
        retry_count -= 1

    print("Failed to send data after retries")
    return False

clock = time.clock()
while True:
    clock.tick()
    img = sensor.snapshot()
    current_prediction = None

    for i, detection_list in enumerate(net.detect(img, thresholds=[(math.ceil(min_confidence * 255), 255)])):
        if i == 0:
            continue
        if len(detection_list) == 0:
            continue

        print(labels[i])
        current_prediction = labels[i]
        for d in detection_list:
            [x, y, w, h] = d.rect()
            img.draw_rectangle(x, y, w, h, color=colors[i], thickness=2)

    if current_prediction:
        last_five_predictions.append(current_prediction)
        if len(last_five_predictions) > 10:
            last_five_predictions.pop(0)

        if all(pred == "Closed_Eye" for pred in last_five_predictions):
            ledRed.on()
            ledGreen.off()
            print("drowsy")
            data = {
                "card_id": "5678",
                "confidence": "0.98",
                "location": "Location B",
                "time_moved": str(time.localtime()),
                "drowsiness_state": "Drowsy",
                "contact": "Contact B"
            }
            print(data)
            send_data_with_retry(data)
        else:
            ledGreen.on()
            ledRed.off()
            print("non_drowsy")

OUTPUT
Connected to Wi-Fi
(‘', '', '', '*’)
Closed_Eye
drowsy
{‘drowsiness_state’: ‘Drowsy’, ‘card_id’: ‘5678’, ‘location’: ‘Location B’, ‘confidence’: ‘0.98’, ‘time_moved’: ‘(2000, 1, 1, 0, 1, 22, 0, 1)’, ‘contact’: ‘Contact B’}
Failed to send data: [Errno 103] ECONNABORTED
Failed to send data: [Errno 103] ECONNABORTED
Failed to send data: [Errno 103] ECONNABORTED
Failed to send data after retries

2

Hi, I recommend using Wireshark to look to see if you notice the Nicla packets on the network and what the PC is responding with. You should generally use this to debug TCP/IP comms.

Failed to send data: [Errno 103] ECONNABORTED

This means that the other side closed the socket. So, you should be able to see the Nicla sending packets and then the other side closing the socket in Wireshark. This will help you determine what’s wrong.