发送短信的AT命令之间的时间延迟

您可以在发送命令行和开始读取响应之间保持100ms的延迟；实际上，我最近已经在我的 atinout 程序中添加了200ms(本地，尚未发布).对于AT+CMGS命令，您必须等到收到"\r\n> "字符串后，再发送任何有效载荷数据(上面的答案中也包含了这一内容).I am working on an application that sends SMS through GSM Modem, and i use AT Commands for that. When i debug my application, Then sms is sent to reciever, but when i run the application sms is not sent to Reciever.My code is below and my gsm Modem is D-Link DWM-156.is there any wrong here in my code?thanks.if (SPort.IsOpen) { int i = 0; while (i < msgs.Count) { SPort.DiscardInBuffer(); System.Threading.Thread.Sleep(1000); var res = SPort.ReadExisting(); SPort.DiscardOutBuffer(); System.Threading.Thread.Sleep(1000); SPort.Write("AT\r"); System.Threading.Thread.Sleep(1000); while ((res = SPort.ReadExisting()).Contains("ERROR")) ; resultResponse += "1" + res + "---"; SPort.Write("AT+CMGF=0\r"); System.Threading.Thread.Sleep(100); while ((res = SPort.ReadExisting()).Contains("ERROR")) ; resultResponse += "2" + res + "---"; SPort.Write("AT+CSCS=\"HEX\"\r");//char set System.Threading.Thread.Sleep(100); while ((res = SPort.ReadExisting()).Contains("ERROR")) ; resultResponse += "3" + res + "---"; SPort.Write("AT+CSMP=17,71,0,17\r"); System.Threading.Thread.Sleep(100); while ((res = SPort.ReadExisting()).Contains("ERROR")) ; resultResponse += "4" + res + "---"; string hexString = msgs[i]; SPort.Write(string.Format("AT+CMGS={0}\r", (hexString.Length - 16) / 2)); System.Threading.Thread.Sleep(100); while ((res = SPort.ReadExisting()).Contains("ERROR")) ; resultResponse += "5" + res + "---"; SPort.Write(string.Format("{0}{1}\n", hexString, Convert.ToChar(26))); System.Threading.Thread.Sleep(100); while ((res = SPort.ReadExisting()).Contains("ERROR")) ; resultResponse += "6" + res + "---"; System.Threading.Thread.Sleep(1500); response += res; i++; } } 解决方案 Yes, you need to rework your response handling a little bit, but you are actually close (and way better that the unfortunately not uncommon send-sleep pattern that I initially thought you were using when I saw a call to Sleep). And you are correctly using \r to terminate AT command lines, so good start.After sending an AT command you should continuously read (over and over again) response lines from the modem until you get a Final result code (usingContains("ERROR") is not good enough). See this answer for the code flow structure and reference to a function for determining if a line is a final result code.You can keep the 100ms delay between sending the command line and starting to read the response; I have in fact added 200ms to my atinout program recently (locally, not released yet).And for the AT+CMGS command, you must wait until you have received the "\r\n> " string before sending any payload data (also covered in the answer linked above). 这篇关于发送短信的AT命令之间的时间延迟的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！