I would like to send a couple of bytes (not string) via TCP , like 0x25 0x25 0x25 0x06 0x00 in one shot. All I found on the web does not work in may case. I checked several proposals I found here and on the WEB, but most of them are for BT connection. Can anybody advice how to realize this?

You can try this Appinventor-SerialOTG/SerialOTG_1.5.pdf at main · rkl099/Appinventor-SerialOTG · GitHub . SerialOTG can use serial line, BT classic and TCP/IP.

Need to send more than one byte via TCP-Socket

MIT App Inventor Help

ABG July 25, 2025, 2:33pm 2

Have you tried

That's all I could find on this board.