import sensor, image, time, os, tf, pyb from pyb import UART sensor.reset() # Reset and initialize the sensor. sensor.set_pixformat(sensor.GRAYSCALE) # Set pixel format to RGB565 (or GRAYSCALE) sensor.set_framesize(sensor.QVGA) # Set frame size to QVGA (320x240) sensor.set_windowing((240, 240)) # Set 240x240 window. sensor.skip_frames(time=2000) # Let the camera adjust. uart = UART(3, 15200) clock = time.clock() while(True): clock.tick() img = sensor.snapshot().binary([(0,64)]) img.lens_corr(1.8) for obj in tf.classify("shuzishibie.tflite", img, min_scale=1.0, scale_mul=0.5, x_overlap=0.0, y_overlap=0.0): output = obj.output() number = output.index(max(output)) if number==1: uart.write('1') print(number) elif number==2: uart.write('2') print(number) elif number==3: uart.write('3') print(number) elif number==4: uart.write('4') print(number) elif number==5: uart.write('5') print(number) elif number==6: uart.write('6') print(number) elif number==7: uart.write('7') print(number) else: uart.write('8') print(number)

### OpenMV UART Write Example Code and Documentation In the context of using UART with an OpenMV device, configuring and performing write operations involves setting up the UART interface properly before sending data. The setup typically includes specifying parameters such as baud rate, parity bits, stop bits, etc., which are essential for establishing communication between devices. For writing to a UART port on an OpenMV module, one can use Python scripts provided by the OpenMV IDE or custom-written ones that interact directly with hardware interfaces through libraries designed specifically for this purpose. Below is an illustrative piece of code demonstrating how to configure UART settings and perform a simple write operation: ```python import pyb # Importing necessary library from micropython uart = pyb.UART(3, 9600) # Initialize UART object at specified baudrate (here it's set to 9600 bps) uart.init(9600, bits=8, parity=None, stop=1) # Detailed initialization including bit length, parity check, number of stop bits data_to_send = "Hello World!\r\n" uart.write(data_to_send.encode()) # Convert string into bytes then send over UART line ``` This script initializes UART channel `3` with a baud rate of `9600`, configures its properties like character size (`bits`) being eight-bit wide without any parity checking mechanism enabled while having only single stop bit after each byte transmitted[^1]. Afterward, converts plain text message `"Hello World!"` along with carriage return and newline characters appended at end into corresponding ASCII codes via `.encode()` method call prior transmitting them outwards across serial connection established earlier within same program flow control structure. The configuration options available when initializing UART may vary depending upon specific requirements related either towards connecting peripheral modules supporting different protocols or interfacing standards other than standard asynchronous serial communications used here; however, these examples should provide sufficient guidance regarding basic usage patterns associated with implementing similar functionalities elsewhere inside projects involving embedded systems development workloads targeting platforms compatible with MicroPython runtime environment running atop ESP-based boards including but not limited to those manufactured under brand name 'OpenMV'. --related questions-- 1. How does changing UART parameters affect communication stability? 2. What are common troubleshooting steps for debugging UART connections in embedded systems? 3. Can you explain more about error handling during UART read/write operations? 4. Are there differences between UART implementations across various microcontroller families?