尝试在 Python 中使用 GSM 调制解调器拨打电话时收到“NO CARRIER”错误
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Receiving "NO CARRIER" error while tring to make a call using GSM modem in Python
提问by Abraham
I want to make a call using my GSM modem. So I wrote the below program:
我想使用我的 GSM 调制解调器拨打电话。所以我写了下面的程序：
import time
import serial
recipient = "+98xxxxxxxxxx"
phone = serial.Serial("COM10", 115200, timeout=5)
try:
time.sleep(0.5)
phone.write(b'ATZ\r')
time.sleep(1)
phone.write(b'ATD"'+recipient.encode() +b'"\r')
while(1):
print(phone.readline())
time.sleep(0.5)
finally:
phone.close()
But when I run it I receive this output:
但是当我运行它时，我收到了这个输出：
>>> ================================ RESTART ================================
>>>
b'ATZ\r\r\n'
b'OK\r\n'
b'ATDxxxxxxxxxx\r\r\n'
b'NO CARRIER\r\n'
What does this "NO CARRIER" error means?
这个“NO CARRIER”错误是什么意思？
Note that I can send SMS successfully.
请注意，我可以成功发送短信。
This is the program that I use to send SMS:
这是我用来发送短信的程序：
import time
import serial
recipient = "+98xxxxxxxxxx"
message = "Test"
phone = serial.Serial("COM10", 115200, timeout=5)
try:
time.sleep(0.5)
phone.write(b'ATZ\r')
time.sleep(0.5)
phone.write(b'AT+CMGF=1\r')
time.sleep(0.5)
phone.write(b'AT+CMGS="' + recipient.encode() + b'"\r')
time.sleep(0.5)
phone.write(message.encode() + b"\r")
time.sleep(0.5)
phone.write(bytes([26]))
time.sleep(0.5)
finally:
phone.close()
采纳答案by Abraham
I found the origin of the error :
我找到了错误的根源：
The syntax is ATD+98xxxxxxxxxx;followed by terminating string. I was forgotten to put semicolon at the end after the number.
语法ATD+98xxxxxxxxxx;后跟终止字符串。我忘了在数字后面加分号。
So I replace
所以我替换
phone.write(b'ATD"'+recipient.encode() +b'"\r')
with
和
phone.write(b'ATD"'+recipient.encode() +b';"\r')
And now it works fine.
现在它工作正常。
Based on the brackets in thisdocuments, I thought that using ";" is optional. But it seems that I was wrong.
基于本文档中的括号，我认为使用“;” 是可选的。但似乎我错了。
