HHC-N8I8OP

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Overview

Ethernet (TCP) and Modbus (RS-485) interfaced 8-channel relay output and 10 optocoupler input module.

Software

There is Chinese software to configure the MAC address, IP address, Modbus baud-rate, etc.

Factory Reset Button

The tactile button is hooked to pin 93 (PB7) of the microcontroller, it is used for factory reset.

Debug Interface

Header labeled "P2":

Silkscreen MCU Pin Function
G GND
K 76 SWCLK/PA14
S 72 SWDIO/PA13
V +3.3V

Bill of Materials

HHC-N8I8OP-V1.2-2019/05/03
Name Markings
U5 AMS1117-3.3
2011
U6 M2303ADN
M4776028
MPSM23
?? ST ULN2003
GO021010
?? ATMLH021
02CM CN
2021E6H
?? GigaDevice GD32F107VCT6
CEEF481
AJ2038
?? SP485EE
2027L
H1PF54
?? EL817
C038
?? HanRun HR911105A 20/26
?? HUI KE HK3FF-DC5V-SHG
?? KEFA KF2EDGV/R [2-pos]
?? KEFA KF2EDGV/R [3-pos]
?? KEFA KF2EDGV/R [12-pos]

Online Resources

Amazon.com: Walfront 8 Channel Network Relay Module Remote Control Relay Device Ethernet to RS485, TCP Relay Module: Home & Kitchen

8 way network relay RS485 to Ethernet switch controller MODBUS TCP IP relay|Relays| - AliExpress

8I8O-road Modbus TCP relay switch_DANIU-IoT

Умный дом - Общая тема - 4PDA

Need help with Baidu Wangpan - Chinese Computing and Electronics - Chinese-forums.com

natm/iocontrollergw: I/O Controller Gateway

Sigmund Kreuzer / HHC-N-8I8O Relais board · GitLab