Data Sheet

ESP-12S User Manual
8
2.2. Pin Mode
Table 4 Pin Mode
Mode GPIO15 GPIO0 GPIO2
UART low low high
Flash Boot low high high
2.3. Antenna interface
ESP-12S Modules through the IPEX interface to connect to external antenna.
The antenna must be in line with the 802.11g/802.11b IEEE standard, and the antenna parameters are shown in
the following table：
Table 5 Antenna parameters
Rating
Value
Frequency range 2.4~2.4825GHz
Impedance
50Ω