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ESP32 RS485 (Modbus) Controller Module
Files
Schematic
PCB
Open in Flux
USB1
U1
D2
ESP_RX
GPIO36
ESP_RX
CC1
ESP_TX
RS485_B
USBDP
RS485_TX
RS485_EN
RS485_TX
USBDN
GPIO15
GPIO14
ESP_TX
GPIO21
USBDP
GPIO34
GPIO34
RS485_B
GPIO25
CC2
GPIO27
ESP_IO0
GPIO25
USBDN
ESP_IO0
GPIO22
GPIO16
RS485_A
GPIO5
ESP_IO0
CC1
USBDP
GPIO13
GPIO17
GPIO12
RS485_EN
GPIO35
GPIO16
GPIO33
GPIO12
RS485_RX
USBDN
ESP_RX
GPIO33
GPIO36
GPIO32
GPIO15
USBDN
ESP_EN
USBDP
GPIO2
RS485_RX
GPIO26
GPIO13
GPIO22
CC2
GPIO2
GPIO39
GPIO26
RS485_A
GPIO39
USBDN
GPIO32
ESP_EN
GPIO14
GPIO21
ESP_TX
ESP_EN
GPIO23
GPIO23
ESP_IO0
GPIO5
GPIO27
ESP_EN
GPIO17
USBDP
GPIO35
GPIO23
+3V3
GPIO2
GPIO13
ESP_TX
GND
VBUS
GPIO35
+3V3
R1
Resistance
Resistance
Resistance
10kΩ
+3V3
+3V3
GPIO26
GPIO34
+5V
R6
Resistance
10 Ω
R2
Resistance
Resistance
Resistance
5.1kΩ
ESP_EN
+3V3
ESP_RX
R5
Resistance
10 Ω
R4
Resistance
1kΩ
GPIO5
GPIO33
GPIO32
R3
Resistance
Resistance
Resistance
5.1kΩ
+5V
GPIO12
GPIO36
+3V3
GPIO25
GPIO0
R7
Resistance
10 Ω
GPIO15
+3V3
VBUS
+5V
GPIO16
GPIO21
+3V3
R8
Resistance
10kΩ
GND
+3V3
+3V3
GPIO14
GPIO17
+5V
R9
Resistance
10kΩ
GPIO27
GPIO39
GPIO22
+3V3
+3V3
D1
C4
Capacitance
10uF
C3
Capacitance
10uF
C11
Capacitance
0.1uF
C8
Capacitance
10uF
C6
Capacitance
0.1uF
Q1
TERM
C10
Capacitance
0.1uF
C2
Capacitance
0.1uF
C1
Capacitance
0.1uF
C12
Capacitance
0.1uF
Q2
U2
PWR
C9
Capacitance
10uF
RST
C5
Capacitance
10uF
IC3
BOOT
IC1
A RS485 B
D3
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