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Schematic of ESP-WROOM-02U Reference Design
U2
C4
Capacitance
10uF
ESP_RX
TOUT
ADC
GPIO15
GPIO14
C8
Capacitance
10uF
ESP_IO0
C6
Capacitance
0.1uF
C7
Capacitance
0.1uF
GPIO16
GPIO5
GPIO13
TOUT
GPIO12
GPIO4
ESP_EN
C12
Capacitance
0.1uF
GPIO2
RST
ESP_TX
ESP_EN
ESP_IO0
+3V3
ESP1
R1
Resistance
Resistance
Resistance
10kΩ
R8
Resistance
Resistance
Resistance
82kΩ
+3V3
R7
Resistance
Resistance
Resistance
220kΩ
+3V3
+3V3
+3V3
R6
Resistance
Resistance
Resistance
10kΩ
R5
Resistance
Resistance
Resistance
10kΩ

ESP-WROOM-02U Reference Design