SMS send problem

[Sami]

Hello

We updated to latest version 2.4.7 from 2.4.1 and after that SMS stopped working. We are using CentOS 7 and RPM from http://repo.zabbix.com/zabbix/2.4/rhel/7/x86_64/

I have tryed to check everything, but cannot find any configuration errors. zabbix user is member of dialout. I can also send sms from console.

zabbix-server.log shows following errors:

20716:20151208:152817.869 In execute_action(): alertid [23644] mediatype [2]
20716:20151208:152817.869 In send_sms()
20716:20151208:152817.869 In write_gsm() str:'.'
20716:20151208:152817.869 End of write_gsm():SUCCEED
20716:20151208:152817.869 In write_gsm() str:'AT+CMEE=2
'
20716:20151208:152817.869 End of write_gsm():SUCCEED
20716:20151208:152817.869 In read_gsm() [] [NULL] [NULL] [NULL]
20716:20151208:152817.886 Read attempt #0 from GSM modem [.AT+C]
20716:20151208:152817.886 Read from GSM modem [.AT+C]
20716:20151208:152817.886 End of read_gsm():SUCCEED
20716:20151208:152817.886 In write_gsm() str:'ATE0
'
20716:20151208:152817.886 End of write_gsm():SUCCEED
20716:20151208:152817.886 In read_gsm() [OK] [NULL] [NULL] [NULL]
20716:20151208:152817.906 Read attempt #0 from GSM modem [MEE=2]
20716:20151208:152817.906 Read from GSM modem [MEE=2]
20716:20151208:152817.906 In check_modem_result()
20716:20151208:152817.906 End of check_modem_result():FAIL
20716:20151208:152817.906 End of read_gsm():FAIL
20716:20151208:152817.906 In write_gsm() str:'
..'
20716:20151208:152817.906 End of write_gsm():SUCCEED
20716:20151208:152817.906 In read_gsm() [] [NULL] [NULL] [NULL]
20716:20151208:152817.906 error during wait for GSM modem
20716:20151208:152817.906 Read from GSM modem []
20716:20151208:152817.906 End of read_gsm():SUCCEED
20716:20151208:152817.909 End of send_sms():FAIL
20716:20151208:152817.909 End of execute_action():FAIL
20716:20151208:152817.909 error sending alert ID [23644]
20716:20151208:152817.909 query without transaction detected
20716:20151208:152817.909 query [txnlev:0] [update alerts set retries=1,error='Expected [OK] received [MEE=2]' where alertid=23644]

Any ideas?

Regards
Sami

[Sami]

Problem solved after upgrading to zabbix 3.0.

Still maybe one of ten sms messages gives error: Expected [+CMGS: ] received []. SMS is still send anyway.