ESP32 opto-isolated relay board not working - PC817 opto-isolator

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Controlling Relay Boards from an ESP32 - YouTube

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How to control a relay module with an esp32

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esp8266 - ESP32 3.3 V relay - Electrical Engineering Stack Exchange
esp8266 - ESP32 3.3 V relay - Electrical Engineering Stack Exchange

Esp32 relay control

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Esp32 Relay Schematic
Esp32 Relay Schematic

Esp32 tutorials

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ESP32 Relay Module - YouTube
ESP32 Relay Module - YouTube

Esp32 relay module

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ESP32 opto-isolated relay board not working - PC817 opto-isolator
ESP32 opto-isolated relay board not working - PC817 opto-isolator

esp8266 - ESP32 3.3 V relay - Electrical Engineering Stack Exchange
esp8266 - ESP32 3.3 V relay - Electrical Engineering Stack Exchange

Controlling Relay Boards from an ESP32 - YouTube
Controlling Relay Boards from an ESP32 - YouTube

Remote nodes | Smart-Thermostat.eu
Remote nodes | Smart-Thermostat.eu

ESP32 Tutorials - Control AC Appliances with Relay (Web Server)
ESP32 Tutorials - Control AC Appliances with Relay (Web Server)

Esp32 Relay Control
Esp32 Relay Control

Controlling 8 relays with ESP32 and shift register • AranaCorp
Controlling 8 relays with ESP32 and shift register • AranaCorp

MicroPython: Relay Module with ESP32/ESP8266 (Guide + Web Server
MicroPython: Relay Module with ESP32/ESP8266 (Guide + Web Server

ESP32 - Controls Relay via Web | ESP32 Tutorial
ESP32 - Controls Relay via Web | ESP32 Tutorial