ES32D26 is a multi-function relay board developed and designed by eletechsup. It has RS485 interface and multi-channel analog and digital input and output ports. If you master ESP32 programming, you can use this module to design many useful smart home control devices.
Product Features:

1 Operating voltage: DC 12V/DC 24V

2 Operating Current : Standby current (Digital tube OFF) 14MA, Standby current 52MA (Digital tube ON), 1 relay open 76MA, 2 relays open 107MA, 3 relays open 133MA, 4 relays open 167MA,5 relays open 185MA, 6 relays open 213MA, 7 relays open 258MA, 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,2x 0-5V/10V Voltage Output(OR 2x 0/4-20MA Current Output),1x ESP32 slots,8x relay outputs

4 size 180*72*19mm(Only Board)
5 Weight : 150g(Only Board), 276g(with shell)
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),
2x 0-5V/10V Voltage Output(OR 2x 0/4-20MA Current Output)
4x 0/4-20MA Current Collection,
4x 0-5V/10V Voltage Collection,
8x RS485 DI-DO
Motor forward and reverse,
Power-up delay,
Trigger delay,
Infinite loop delay,
A finite number of cyclic delays,
Power sequencer,
And so on.
This is an expansion board based on 38PIN ESP32. We only provide some codes for testing the hardware. More codes and functions need to be developed by yourself.
If you need more functionality, write your own code. We do not provide additional code and technical support

Note: ES32D26 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
Note: Vo1/Io1, Vo2/Io2 are multiplexed output ports, only one of them can be enabled (selected by SW1 dip switch)