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How to send a sms with a Sony Ericsson phone

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I have until now not found any good description on how to send a sms with a Sony Ericsson here on .
Below i share my gathered knowledge and ask other to fill in if they have something to share.
First of i would say that connecting a newer modell of a SonyEricsson phone direct to the TX/RX pins will not work.
It seems as new Sony Ericsson phones need a TX/RX voltage of somewhere about 2,6V to get it working. If you use one of the listed older phones you should get it working with the 5V TX/RX from the Arduino.

T series :
T39, T68, T68i, T230, T250, T610, T630, T650i

K series:
K300, K310, K320i, K500, K510i , K530, K550i, K750i

W Series:
W200, W300, W550, W580, W600, W610, W660, W700, W710, W800, W810, W830, W850, W880, W900, W910

Z Series:
Z250, Z310, Z320, Z500, Z520, Z525, Z530, Z550, Z558, Z600, Z610, Z710, Z750, Z800, Z1010

To understand how to send a sms you need to check this link:

For easy conversion of septets into octets use below link, it will save you a lot of time:
Use 00 for SMSC and then input your number in the receiver area.

Coding example is provided below, reason to why you need to wait 3 seconds between AT commands is that otherwise you will overflow the serial communication and the phone will ignore the commands.

--- Code: ---      Serial.println("AT+CMGF=0"); // Set PDU mode
     Serial.println("AT+CMGS=19"); // Number of octets
     Serial.print("0011000B916407172132F30000AA05C8329BFD06"); // Sends "Hello" to "00 46707112233"
--- End code ---

More AT commands can be found here:

Have fun  :D


I have a T250i and I would like to connect it to my arduino to send sms.
The data cable I have is an usb one, coud you explain how I can connect them together ? I suppose I have to remove usb connector, but I don't know the pinout for the phone. Or is it possible to have a breakout connector somewhere ?

Sorry, do not know the pinout of the T250i.
I googled it and found below picture, if it is correct or not i can not say, you need to search for it on the internet.
Yes, you need to remove the usb connector and connect the cables to Arduino.

I ordered a cable and received DCU-60 one.
pinout is like the picture. but I cannot make it to work with arduino

How can I test that the serial connection is well working ? i'm on a mac.

I suggest that you try try to connect your phone to the computer by the usb and then use a hyper terminal. Try to type just "AT" , you should get a "OK" back. Remember to set the baud rate to 9600.
If that works then you need to check your connections with the Arduino.
Maybe switch around TX and RX.
I assume that you have connected both the Arduino and the phone to the same grounding point otherwise it will not work.


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