I am writing FTP client on kinetis MCU with ESP-07S module (ESP8266 integrated).
Wifi connection is working and I can connect (and communicate) with FileZilla server on port 21.
BUT I need to transmit "ASCII data file" to another port WITHOUT disconnected of the actual port (21).
I tried to activate multiple connection with AT+CIPMUX=1 but don't work (link error).
Is it possible to do that ? How ?
best regards from France,
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