DC 12V 24V Multifunction ESP32 Expansion Board Wifi Digital Analog IO Module for Arduino WEB MQTT Ethernet Network Relay DIY

Note！!
 PWR LED does not light up when powered on. Driven by the IO port of the ESP32


Product Title:
DC 12V 24V 8AI-8DI-8DO ESP-WROOM-32 ESP32 Expansion Board RS485 4-20MA 0-5V 0-10V Analog Collection Wifi Relay Switch DIY

(Specific according to the version and quantity you choose)



Product Features:

1 Operating voltage: DC 12V/24V

2 Operating Current : Standby current (Digital tube OFF) 14MA, Standby current 51MA (Digital tube ON), 1 relay open 76MA, 2 relays open 107MA, ... 8 relays open 291MA

3 On-board resources: 1x RS485 Interface 8x opto-isolated inputs (low level trigger, NPN type), 4x 0/4-20MA Current Input,4x 0-5V/10V Voltage Input,4x buttons, 1x 4 bit digital tube display, 1x ESP32 slots, 8x relay outputs

ES32A08

Relay Module:

4 size 180*72*20mm(Only Board)

5 Weight : 189g(Only Board), 317g(with shell)


ES33B08

Darlington tube Module:

4 size 123*72*20mm(Only Board)

5 Weight : 93g(Only Board), 184g(with shell)


For more information, please open the link and download:

https://1drv.ms/u/s!Av4PLxH_z8f1vmogQksQsaUEznMT?e=poUgpb



Purchase Notes:

1 ES32A08/ES33B08 can not work independently, must be under the control of the 38PIN ESP32 board to work,If you do not have a 38PIN ESP32 board, purchase it separately or purchase a kit with 38PIN ESP32

2 This is an expansion board based on 38PIN ESP32. We only provide three vscode codes for testing the hardware. More codes and functions need to be developed by yourself.

3 If you need more functionality, write your own code. We do not provide additional code and technical support

4 The acquisition accuracy of analog quantities is determined by the ESP32 board. It is recommended to collect multiple times to obtain the average value.


Application examples:

As long as you write ESP32 code,You can use it to achieve a variety of delay timer function,such as:

WIFI remote control switch

WIFI Current and voltage collection

RS485 Master-Slave Device(PLC MCU),

4x 0/4-20MA Current Collection,

4x 0-5V/10V Voltage Collection,

Motor forward and reverse,

Timing on,

Timing off,

Power-up delay,

Trigger delay,

Infinite loop delay,

A finite number of cyclic delays,

Power sequencer,

And so on.

Application 1:
Through the programming of 38Pin ESP32, various delay customization functions can be realized instead of PLC.





Application 2:
It can be used as an RS485 master device instead of PLC/PC/touch screen to control various RS485 slave devices.