OPENMV与arduino串口通信问题?
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我是想让openmv发送1给arduino的串口RX2TX2
这是openmv代码# Blob Detection and uart transport import sensor, image, time from pyb import UART import json # For color tracking to work really well you should ideally be in a very, very, # very, controlled enviroment where the lighting is constant... blue_threshold = (92, 16, -31, 9, -40, -17) # You may need to tweak the above settings for tracking green things... # Select an area in the Framebuffer to copy the color settings. sensor.reset() # Initialize the camera sensor. sensor.set_pixformat(sensor.RGB565) # use RGB565. sensor.set_framesize(sensor.QQVGA) # use QQVGA for speed. sensor.skip_frames(10) # Let new settings take affect. sensor.set_auto_whitebal(False) # turn this off. clock = time.clock() # Tracks FPS. sensor.set_hmirror(True) sensor.set_vflip(True) uart = UART(3, 9600) def find_max(blobs): max_size=0 for blob in blobs: if blob.pixels() > max_size: max_blob=blob max_size = blob.pixels() return max_blob while(True): img = sensor.snapshot() # Take a picture and return the image. blobs = img.find_blobs([blue_threshold]) if blobs: max_blob=find_max(blobs) print('sum :', len(blobs)) img.draw_rectangle(max_blob.rect()) img.draw_cross(max_blob.cx(), max_blob.cy()) output_str="[%d]" % (1) #方式1 #output_str=json.dumps([max_blob.cx(),max_blob.cy()]) #方式2 print('you send:',output_str) uart.write(output_str+'\r\n') else: print('not found!')
这是arduino代码
int a; void setup() { // put your setup code here, to run once: Serial.begin(9600); Serial2.begin(9600); } void loop() { Serial2.read(); a = Serial2.read();//读取串口接收到的值,并且存放在a中保存起来 Serial.print(a); Serial.print('\n'); }
在openmv没有打开时是低电平-1
打开openmv时接收到的不是1而是乱码
求大佬解释一下我应该怎么做
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OpenMV发送的是字符串
[1]\r\n
所以你的Arduino中,应该用readStringUntil('\r\n')