how to enable wifi-bluetooth co-existence feature in esp8266

[samueloriginal]

There is hardware register for the co-existence gpio. But there is no information how to use it. Also there is no software routine to control/setup it.
May you direct me to the information?

From the rtos_sdk_programming_guide_en.pdf:
The ESCP–Espressif Systems’ Smart Connectivity Platform has many cutting-edge advantages, including energy-efficient VoIP that can switch rapidly between sleep and wake modes, adaptive radio bias for low-power operations, front-end signal processing capacity, problem shooting capacity, and the radio system co-existence feature to remove cellular, bluetooth, DDR, LVDS and LCD interference.

From the esp8266_technical_reference_en.pdf:
0 0x0000 0x60000300 GPIO_OUT GPIO_BT_SEL [31:16] R/W BT-Coexist Selection register

[pratik]

ESP8266 does support co-existence feature. Please contact support for details at:
http://espressif.com/en/company/contact/after-sale-questions