I have an application that uses HL6528RD-2.8 and it connects via TCP to send data to a server. This works well, and we have built 60+ devices which are all working in the field. I have now exchanged the HL6528RD-2.8 for an HL6528RD-G2.8 in the same PCB and it no longer makes a TCP connection. I am using the same FW as I use for the HL6528RD-2.8 (i.e. no GPS/GNSS commands are being issued so the GNSS module is booting on its default settings and I am not using it yet).
The following commands execute correctly with the expected responses from the module over the UART1:
then nothing further from HL6528RD-G…
HL6528RD-2.8 continues by responding with +KTCP_IND:"1,1 and goes on to post data correctly.
I had imagined that simply swapping the RD-2.8 version with a RD-G2.8 would not affect the TCP side of things. I must be missing something.
Any help would be appreciated.