please clarify CTS / RTS lines

[phil31]

Team,

i use an ESP8266-02 type module.
on this module, the pin 13 ( MTDO ) is DIRECTLY wired to the GND.
the hardwire handshake is enable : i use only the CTS line (input to the ESP8266), to prevent that the ESP8266 send me something when i'm not ready.
when i set CTS = 1 : the ESP stop to send me something : perfect
when i set CTS = 0 : the ESP send me next thing : perfect


now i try to use the RTS line : if the RTS line is active, i don't send anything to the ESP and wait until RTS is not active.
so i cut the line RTS (which is wired to the GND) and wired it to my host CPU.
now, nothing work anymore !!
i expect that the RTS line is an output from the ESP .. so why it is required to link the pin 13 to GND, to work ??

thanks
Phil

[georeb]

Hi Phil,

You said that making pin 13 high (3.3v) pauses the serial output on TX pin.
Is this true for standard versions of the ESP?

Also, how do I enable the handshake please??

I shall look at the RTS problem for you as I also require this function.

Many thanks,
George