Schematic of [Example] ESP32 Reference Design
A3
B1
A6
A1
A7
A0
B2
A2
B7
SDA
B6
SCL
B3
B0
A5
A4
B4
B5
+3V3
+3V3
+3V3
C4
Capacitance
0.1uF
U2
Manufacturer Part Number
MCP23017-E/SO