User's Manual

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2. ESP-WROOM-02D Pin Description
2. ESP-WROOM-02D Pin
Description
Figure 2-1 shows the pin distribution of the ESP-WROOM-02D.
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Figure 2-1. ESP-WROOM-02D Pin Layout
ESP-WROOM-02D has 18 pins. Please see the pin definitions in Table 2-1.
19GND
PCB ANTENNA
GND
IO16
TOUT
RST
IO5
GND
TXD
RXD
IO4
3V3
EN
IO14
IO12
IO13
IO15
IO2
IO0
GND
9
8
7
6
5
4
3
2
1
10
11
12
13
14
15
16
17
18
Table 2-1. ESP-WROOM-02D Pin Definitions
No.
Pin Name
Functional Description
1
3V3
3.3V power supply (VDD)
📖 Note:
It is recommended the maximum output current a power supply
provides be of 500 mA or above.
2
EN
Chip enable pin. Active high.
3
IO14
GPIO14; HSPI_CLK
4
IO12
GPIO12; HSPI_MISO
5
IO13
GPIO13; HSPI_MOSI; UART0_CTS
6
IO15
GPIO15; MTDO; HSPICS; UART0_RTS
Pull down.
Espressif
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2017.11