Hi, we got a Quectel EC21 in a location with bad reception (4G (mostly) not available, using 2G as fallback, connection still unstable). The system works nicely for a while until we encounter the situation below from which it never recovers.
Jan 18 15:50:43 CloudGateway01 ModemManager[188]: transaction 0x71e aborted, but message is not abortable Jan 18 15:50:43 CloudGateway01 ModemManager[188]: transaction 0xf aborted, but message is not abortable Jan 18 15:50:43 CloudGateway01 ModemManager[188]: <warn> [modem0/bearer0] checking if connected failed: Transaction timed out Jan 18 15:50:43 CloudGateway01 ModemManager[188]: <warn> [modem0] could not load SIM identifier: QMI operation failed: Transaction timed out Jan 18 15:50:43 CloudGateway01 ModemManager[188]: <warn> [modem0] (quectel) couldn't check SIM swap: QMI operation failed: Transaction timed out Jan 18 15:50:48 CloudGateway01 ModemManager[188]: transaction 0x71f aborted, but message is not abortable Jan 18 15:50:48 CloudGateway01 ModemManager[188]: <warn> [modem0/bearer0] checking if connected failed: Transaction timed out Jan 18 15:50:53 CloudGateway01 ModemManager[188]: transaction 0x720 aborted, but message is not abortable Our current workaround is a reboot after which the system works again for some time. Has anyone seen this before or could offer some advice (i'd like to find a more gracious method of recovery than a reboot)? Best regards, Ralf Dipl. Ing. Ralf Glaser Entwicklungsleiter IoTmaxx GmbH Bultstrasse 5a 30159 Hannover Tel.: +49 511 936874-29 Fax.: +49 511 936874-33 Sitz der Gesellschaft: Hannover, Amtsgericht Hannover HRB 220223, USt-IdNr.: DE326326282 Geschäftsführer: Christian Lelonek Diese E-Mail kann vertrauliche und/oder rechtlich geschützte Informationen enthalten. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser Mail oder von Informationen daraus ist nicht gestattet. This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorised copying, disclosure or distribution of the information contained in the e-mail is strictly forbidden.
