ESP32 ISO board

Board Pin Definitions

Version V4

Version V3

Version V2

Version V1

Pin Definitions Template

Pin Prerequisite V2   Used for V1 Note V1
36 input_only »   »  
39 input_only »   »  
34 input_only IN1 via jumper »  
35 input_only IN2 via jumper »  
32   IN3 via jumper IN1 via jumper
33   IN4 via jumper IN2 via jumper
25 DAC »   IN3 via jumper
26 DAC »   IN4 via jumper
27   OUT1 via jumper OUT1 via jumper
14   OUT2 via jumper OUT2 via jumper
12 strapping SDA   »  
13   OUT3 via jumper I2C  
15 strapping »   I2C  
2 strapping SCL   »  
0 strapping »   »  
4   OUT4 via jumper OUT4 via jumper
16   U2_T   U2  
19   VSPI_SO   VSPI  
17   U2_R   U2  
5 strapping VSPI_CS   VSPI  
18   VSPI_CLK   VSPI  
20 x NC     OUT3 via jumper
21   U1_R   U1  
3 U0R U0R   U0  
1 U0T U0T   U0  
22   U1_T   U1  
23   VSPI_SI   VSPI  

breakout daughter board

Use Guide

  • connect IO0 to GND to enter into programming mode

ref

Demo video

  • RS485 / RS422 / RS232 / CAN brekaout board with ESP32 ISO Board test - youtube here.