+CMS ERROR: 304, sending message using at command
20,573
Solution 1
Try by chaning PDU mode. Use the following command:
AT + CMGF = 1
If you are trying to Send SMS try AT + CMGF = 1
first and then again AT+CMGS="NUMBER"
and hope after typing the message on > prompt
, you are using CTRL+Z
key combination to send SMS.
Solution 2
Instead of hitting ENTER after placing the PDU, use CTRL-Z to send message.
credits to @user2543882
Author by
kudarap
Updated on July 09, 2022Comments
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kudarap almost 2 years
Im new to GSM and AT command sets,
based on the error +CMS ERROR: 304 its a Invalid PDU mode parameter according to activexperts
Im trying to send message using AT command to GSM modem in PDU mode
AT+CMGF=0 OK AT+CMGS=31 > 079136190700203911000C913639350768260000AA13C834A89D07B9C3ED32283D0751C3F3F41B +CMS ERROR: 304
Can you help me guys what did I missed or mistake? I used this to encode the PDU
Thanks guys.
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kudarap almost 9 yearsThanks mate for giving me a clue that I didn't <CTRL+Z>