I’ve got a TCP Stream to the Hologram cloud socket working and can successfully send messages to it using the Hologram Dashboard Messaging tab. The connection was established using
%s is the IP and
%u is the port.
When I receive a message, I try to immediately reply to it using
%u is the length of my outgoing string. I then wait 20ms and then send the string of data. Reading the buffer, I get the error
+CIPERROR: 4. Checking the SIMCOM manual, it seems that this error represents
Operation not supported. Am I doing something wrong? Can I truly not send outbound TCP, because if so I’m going to be requesting a refund. Thanks!