Here’s some example code that should get you started (in Python 3000):
import time import serial recipient = "+1234567890" message = "Hello, World!" phone = serial.Serial("/dev/ttyACM0", 460800, 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()) time.sleep(0.5) finally: phone.close()
You need to do two additional things:
- Encode the message in the appropriate format (mostly GSM 03.38, there’s a handy translation table at unicode.org). If you really don’t care about any characters other than ASCII, you can just check if every character is in
- Check the length of the message (I’m not sure if it’s to do with the encoding, but it’s sometimes 140 characters, sometimes 160).
You can use
phone.readall() to check for errors, but it’s best to make sure your message is OK before you send it off to the phone. Note also that the sleeps seem to be necessary.
Most phones will understand this. In order to get my old Nokia C5 to open up the serial connection, I had to select “PC Suite” from the menu that pops up when you insert the USB cable. This should work equally well over Bluetooth.
The code uses the PySerial package, available for python 2 and 3.
to see send sms using At command this will help.
import serial import time class TextMessage: def __init__(self, recipient="+2348065777685", message="TextMessage.content not set."): self.recipient = recipient self.content = message def setRecipient(self, number): self.recipient = number def setContent(self, message): self.content = message def connectPhone(self): self.ser = serial.Serial('COM70', 460800, timeout=5, xonxoff = False, rtscts = False, bytesize = serial.EIGHTBITS, parity = serial.PARITY_NONE, stopbits = serial.STOPBITS_ONE) time.sleep(1) def sendMessage(self): self.ser.write('ATZ\r') time.sleep(1) self.ser.write('AT+CMGF=1\r') time.sleep(1) self.ser.write('''AT+CMGS="''' + self.recipient + '''"\r''') time.sleep(1) self.ser.write(self.content + "\r") time.sleep(1) self.ser.write(chr(26)) time.sleep(1) def disconnectPhone(self): self.ser.close() sms = TextMessage("+2348063796720","Mummy i sent this message from my computer") sms.connectPhone() sms.sendMessage() sms.disconnectPhone() print "message sent successfully"
To recieve sms using At command this should help
import serial import time import sys class HuaweiModem(object): def __init__(self): self.open() def open(self): self.ser = serial.Serial('COM70', 406800, timeout=5) self.SendCommand('ATZ\r') self.SendCommand('AT+CMGF=1\r') def SendCommand(self,command, getline=True): self.ser.write(command) data = '' if getline: data=self.ReadLine() return data def ReadLine(self): data = self.ser.readline() print data return data def GetAllSMS(self): self.ser.flushInput() self.ser.flushOutput() command = 'AT+CMGL="REC UNREAD"\r\n'#gets incoming sms that has not been read print self.SendCommand(command,getline=True) data = self.ser.readall() print data h = HuaweiModem() h.GetAllSMS()
Talking to the phone is easy. You just need to open the appropriate
/dev/ttyACM* device and talk to it. Which phone is trickier. Any phone that supports “tethering” and the full AT command set for SMS messages should be fine.
I would suggest replace the
time.sleep with condition loop waiting for the response from the modem “OK” before continue next state.