User's Manual

"
3. Hardware Preparation for Compiling ESP-WROOM-02D
3. Hardware Preparation for
Compiling ESP-WROOM-02D
3.1. Hardware Preparation
•
ESP-WROOM-02D module
•
USB-to-TTL converter (FT232R recommended)
•
PC for programming: Windows XP or Windows 7 OS is recommended, with enough
RAM to run a Linux virtual machine.
• Micro-USB cable
3.2. Hardware Connection
1. Lead out the pins of the ESP-WROOM-02D, as shown in Table 2-2.
2. Connect ESP-WROOM-02D to the USB-to-TTL converter, using Dupont lines, as
shown in Figure 2-1.
! !
Table 2-2. ESP-WROOM-02D Pins
Pin
Pin status
EN
Pull up
3V3
3.3V power supply (VDD)
IO15
Pull down
IO0
UART download: pull down;
Flash boot: floating/pull up
GND
GND
RXD
Receive-end in UART download
TXD
Transmit-end in UART download; floating/pull up
EN
3V3
ESP-WROOM-02
3V3
TXD
RXDTXD
RXD
GNDGND
IO15 IO0
USB-to-TTL converter
PC
Espressif
" /"4 23
2017.11