at^sjmsec command on ELS61-E throwing error "wrong command format" | Telit Cinterion IoT Developer Community
June 14, 2021 - 3:36pm, 4297 views
I'm testing communication to AWS IoT by adding server certificate and client certificate and private key.
As this is is a new PCBA HW with new chip (ELS61-E), I don't have access to modem chip via any demo board, everything has to be done via a MCU in between, which in turn communicate to the modem via UART.
I have been following instruction here: https://iot-developer.thalesgroup.com/showcase/concept-board-connection-...
I managed to transfer "AddHttpsCertificateUntrusted.bin" file over to the modem using AT^SJDL, and I know the content is correct because 1) the CRC returned from SJDL is correct and 2) I have readback the file content using AT^SFSA.
Now, when I try to install server certificate using the following command:
I always got the following response:
appl> URC: at^SJMSEC="file",AddHttpsCertificateUntrusted.bin
URC: ^SJMSEC: 1,"wrong command format"
URC: +CME ERROR: invalid index
It looks like the server certificate is invalid, however, I don't have further information to see why. The server certificate is downloaded from https://www.amazontrust.com/repository/AmazonRootCA1.pem, and I upload the bin file here: https://www.mediafire.com/file/rno1mskdgs6nvcs/AddHttpsCertificateUntrus...
Any pointer to where the error might be is appreciated. Thanks!
sending to modem : ATI1received response: Cinterionreceived response: ELS61-E R2received response: REVISION 02.000received response: A-REVISION 01.000.02