Comments (1)
xmaihh
commented on June 23, 2024
1
首先，能够接收数据，但是数据错误，说明串口通信成功了。
1）RS232 是全双工的 发送和接收可以同时进行
2）RS485 是半双工的，发送和接收不能同时进行，发送和接收切换开关需要控制
3）信号干扰、传输距离太远、通信速率过高等原因导致数据传输出现错误
在您的情况下，您可以尝试以下措施：
- 增加线缆的屏蔽性能或使用双绞线来减少信号干扰；
- 缩短通信距离或使用信号放大器来增强信号；
- 降低通信速率；
- 检查RS485发送和接收的电路和程序是否正确；
- 如果可能，请使用逻辑分析仪或示波器等工具来分析信号。
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Related Issues (20)
- Custom baud rate support HOT 1
- 串口关闭 HOT 1
- Open串口成功，可以发送数据，但接受不到数据 HOT 1
- 你好我想问一下，咱们这个支持 ModBus通讯协议，RTU模式 吗？ HOT 1
- 运行demo，从demo发送数据正常，但是接收不到从pc发送的数据 HOT 11
- 能打开串口，但是接收不到消息！ HOT 4
- 粘包处理求助 HOT 7
- 安卓设备发送大数据问题求助 HOT 1
- 在连接状态，拔了usb 串口，日志一直警告的报错，能监听usb串口连接状态吗 HOT 1
- ANR in com.ex.serialport (com.ex.serialport/.MainActivity) 点击了两次开启报ANR异常 HOT 1
- 串口发送正常，但接收数据单次超过9个数字类型长度app就会卡死。 HOT 6
- 我遇到了丢数据的问题 HOT 1
- 在Android 10.0版本上报错：Cannot run program "/system/bin/su": error=2, No such file or directory HOT 3
- Class 'FileDescriptor' has no field named 'descriptor'. HOT 2
- file not found and Use of undeclared identifier 'ioctl' HOT 3
- 多串口同时接收和发送数据怎样做？ HOT 2
- java.lang.NullPointerException: println needs a message at android.util.Log.println_native(Native Method) at android.util.Log.e(Log.java:236) at tp.xmaihh.serialport.SerialHelper$ReadThread.run(SerialHelper.java:114) HOT 8
- 串口发送正常，但接收数据单次超过9个数字类型长度app就会卡死
- 串口发送成功了，硬件已响应，但是程序不会收到结果（如果用其他串口软件开启一下串口后，用此项目就能显示到接收的结果） HOT 2
- serialHelper.close() HOT 1
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