Your cart is empty.
Your cart is empty.Product Description
ESP32 2 Channel 5V Relay Module, 4M Byte Flash, Large Capacity Programmable Relay Board for Secondary Development Learning
Characteristic:
Large capacity: This relay module has a large enough capacity of 4M, you can use it in the real situation.
Mature and stable module: This module supports I/O port , as well as with the UART program download port, all pins, programmable keys and reset keys, mature and stable.
Output switching signal: This relay board contains a 5V relay 2-way with output switching signal, suitable for controlling loads with operating voltage of 250V AC or 30V DC or less.
Sam Myres
2025-06-24 15:06:03
We have an aquarium that I previously wired an esp32 dev board and self-latching relay to turn on and off. After learning the latching mechanism had to be powered independently, I looked into board with the relay built in and found this. Instead of having to short a momentary switch through a transistor all the functionality is now on the same board, wifi to get NTP time and the current settings, 12v -> 3.3 for the board, everything! this is awesome! bubba the beta loves it!FYI if you're using macOS and an FTDI USB->TTL converter, make sure you get and install your driver carefully, on my m2 air I had to go manually allow the driver access to system resources and restart the machine and IDE so you can see the serial port from the adapter.
Customer
2025-05-15 11:43:55
The only thing that would have made this board better, would have been the option to use an external antenna, the reach of these boards are pretty limited, I use them for automation of my 45' RV and it barley reaches from the front to my AP in the back of the RV.
Blue
2025-04-20 17:04:43
Worked perfectly as a garage door opener with ESPHome. I 3D printed a case which you can find if you Google the name of the project on Printables.The status LED is GPIO23 and the relays are on GPIO16, GPIO17.This was the first time I've flashed a board directly using serial -- pretty easy with something like a Tigard. You can hold the IO0 button and then apply power/tap the EN button to get it into flashing mode.I ended up powering it with an old 12V brick I had laying around by connecting it to VCC and GND.
BB
2025-03-11 17:25:25
The board is working well, was easy to get an Arduino IDE sketch loaded using a USB-TTL converter.But I believe you can get the board much cheaper if you are willing to order from other sites and probably wait longer for it. But for me it is going to do the job I need and was worth getting it faster.
psitem
2024-12-18 10:09:52
Beware that since Tasmota v10.0.0, the relays will blip on power-on because Tasmota attempts to detect PSRAM on those pins (GPIO 16 & 17). This is issue #13919 on their GitHub, closed with " as designed."I ended up switching to ESPHome to work-around this problem. Works great.
BillJuv
2024-12-16 17:28:23
It looks like a well-made board, but is poorly documented. I found better information (and better prices) on eBay or Ali Express sites, but still not terribly useful. The headers are included in the package along with a jumper which I saw somewhere is intended to jumper IO0 and GND for booting, but the boot button works fine so it’s not needed. Also, if powering with “7-60V†using the VCC & GND connection, 5V will be supplied at the 5V connection if needed elsewhere (like my Pi ZeroW) (also at 5v pin on the ESP 32). I assume the 5v connection bypasses the power supply needed for higher voltages and powers the board and relay directly.For my purposes, I found flashing it with Tasmota ESP32-Bluetooth worked great (though not without its usual struggles… for me at least). The flash didn’t complete with asking for WiFi info, as it usually does, so I had to power it externally and connect to the Tasmota_xxxx WiFi SSID and go to 192.168.4.1 to complete the WiFi setup.NOTE: if you leave it plugged into the TTL serial port module used to flash it, the board just goes crazy and won’t reconnect to the computer (thus the need to power it externally); if you need to re-flash, I found holding down both the reset and boot buttons at the same time allowed it to connect - releasing the reset button first then the boot button worked for me.I used Blakadder’s “ESP32_Relay_X2†template for the “LC Technology DC5-60V 2 Channel Relay Board†but had to change the relays to GPIOs 16 & 17 (from 25 & 26). The date silkscreened on the board was 2023-02-10, so things may have changed but they look identical.FYI, I intend to use the Bluetooth to monitor a couple of Govee temperature sensors (github tony-fav/tasmota-blerry) and send the info to my RPi Zero W MQTT broker and use the relays to turn on fans/heat as needed. This will replace the separate ESP32 and Shelly1 I currently use. All this is in my camper using a WiFi hotspot when on the road. Oh, the rabbit holes…P.S. pay attention when hooking up power! The power supply is not at all forgiving if you reverse the positive and negative… not even for a second. Oops, I let the smoke out. Good thing I had a spare.
Recommended Products
$162.14
$ 78 .99 $78.99