I2P communicate

nc 127.0.0.1 7656 7656 it is a default port to communicate withs SAM api

than

HELLO VERSION it should respond HELLO REPLY RESULT=OK VERSION=3.1

than you need to generate keys DEST GENERATE SIGNATURE_TYPE=7

i2p router will replay with keys

DEST REPLY PUB=pub PRIV=priv SESSION CREATE STYLE=STREAM ID=ity DESTINATION=priv

obviously ity should be changed to something else(this is human readable identifier) ;)

usually it takes some time to create session(no more than few seconds). response should be:

SESSION STATUS RESULT=OK DESTINATION=...

than,

STREAM ACCEPT ID=ity

from other computer,

STREAM CONNECT ID={YOUR ID} DESTINATION={PEER PUBLIC KEY}

Message each other!

now this session waits for connection from anyone who knows your pub public key