Consultation regarding changes to transmission format

[sensen]

I am using ESP8266EX and working on TCP/IP socket communication with RX630 via Winsock. Currently, when the ESP8266EX receives "1" sent from the PC side, it sends it to RX630 in the format "+IPD,0,1:1". However, since RX630 can only send and receive one byte at a time, the received data gets randomly mixed up among "+IPD,0,1:1". Please tell me how to configure ESP8266EX to simply send only "1" to RX630 instead of "+IPD,0,1:1".