Send/Receive SMS asset tracker v2

Question

Hi there 
 
 We managed to send/receive SMS on the nRF91Dk using the asset_tracker_v1 example, which contains the at_client. 
 However, with the asset_tracker_v2 we never get the at command indicating SMS message received. (+CMT). 
 
 Setup that worked with asset tracker v1: 
 AT+CNUM

AT+CNMI=3.2.0.1 
 Sending an SMS to the number provided by CNUM:

Is there any additional setup required for asset_tracker_v2? 
 
 Same sim card, same dev kit. 
 
 Kind regards 
 Dan

danimalia · Accepted Answer

just to close out this loop for anyone searching for the answer. eDRX must be enabled in the prj.conf file (CONFIG_LTE_EDRX_REQ=y). the default eDRX interval is 163.84 seconds which if you're unaware of, can look like you're not receiving an sms for almost 3 minutes. this can be changed iby adjusting the definition of edrx_param. https://infocenter.nordicsemi.com/index.jsp?topic=%2Fref_at_commands%2FREF%2Fat_commands%2Fnw_service%2Fcedrxrdp.html

Markus Tacker (he/him) · Answer

However, this is caused by the AT host library being disabled by default in asset_tracker_v2, so it won't process AT commands sent to it. It can be enabled like this: 
 CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_AT_HOST_LIBRARY=y Depending on the content of the SMS AT command you send and the configuration of the line termination characters on the PC side, you may also need to set CONFIG_CR_LF_TERMINATION=y or CONFIG_LF_TERMINATION=y (By default CR termination is used to work with most PC applications, but this may cause issues with SMS commands, as CR also is used as a control character within the command when adding a payload to it).

Send/Receive SMS asset tracker v2

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