Hello,
I'm already working on an SMPP module, it can already send messages in synchronous mode and supports UCS-2. I have a desire to prepare a module and PR this year. As for the implementation of proto_smpp in OpenSIPS, I have many questions about it, for example, this module does not analyze the sending result, which is very sad. I have a desire to do well - process the send result for asynchronous sending, process message delivery reports, support message concatenation and special SMS with different data_coding and protocol_id.
Best regards, Vadim Saranov