Hi guys,
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 AT+CIPOPEN=0,\"TCP\",\"%s\",%u,8000\r
, where %s
is the IP and %u
is the port.
When I receive a message, I try to immediately reply to it using AT+CIPSEND=0,%u\r
, where %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!