--- product_id: 236259467 title: "GeeekPi Expansion Board 4 Channel Relay Module for Raspberry Pi 3/2 B, 3 Model B+ & 4 Model B (No Programming Required/Programmable)" brand: "geeekpi" price: "228.46 DT" currency: TND in_stock: true reviews_count: 7 category: "Geeek Pi" url: https://www.desertcart.tn/products/236259467-geeekpi-expansion-board-4-channel-relay-module-for-raspberry-pi store_origin: TN region: Tunisia --- # Fast switching speed 4-channel relay control Stackable multi-module design GeeekPi Expansion Board 4 Channel Relay Module for Raspberry Pi 3/2 B, 3 Model B+ & 4 Model B (No Programming Required/Programmable) **Brand:** geeekpi **Price:** 228.46 DT **Availability:** ✅ In Stock ## Summary > 🔗 Power your smart home like a pro—control, customize, and connect with ease! ## Quick Answers - **What is this?** GeeekPi Expansion Board 4 Channel Relay Module for Raspberry Pi 3/2 B, 3 Model B+ & 4 Model B (No Programming Required/Programmable) by geeekpi - **How much does it cost?** 228.46 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/236259467-geeekpi-expansion-board-4-channel-relay-module-for-raspberry-pi) ## Best For - geeekpi enthusiasts ## Why This Product - Trusted geeekpi brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust & Scalable:** Stack up to four layers for expanded control, future-proofing your smart home or IoT ecosystem. - • **Multi-Language Support:** Develop in your preferred language with broad compatibility, perfect for professional and hobbyist coders alike. - • **Plug & Play Installation:** No programming required—get your Raspberry Pi projects up and running in minutes with easy setup. - • **Seamless 4-Relay Control:** Effortlessly manage multiple devices with four high-quality relays designed for smart home automation. - • **Customizable I2C Addressing:** Avoid conflicts by switching I2C addresses via DIP switches for smooth multi-module stacking. ## Overview The GeeekPi 4 Channel Relay Module is a versatile expansion board compatible with Raspberry Pi 2, 3, and 4 models. Featuring four high-quality relays, it enables fast, reliable switching for smart home projects without mandatory programming. Its DIP switch-configurable I2C addresses allow stacking multiple modules without address conflicts, supporting scalable and multilingual development. Easy to install and designed for low-voltage applications, this module is ideal for professionals and makers aiming to elevate their home automation setups. ## Description Description 4 Channel Relay Hat Board For Raspberry Pi is one of the "docker pi" module.It has 4 channel relay that you can put it on your smart home project. This four-channel relay uses high-quality relay modules combined with the most popular microcontroller technology to communicate with the Raspberry Pi. You can use multiple modules stacked together for use, even you can stack up to four layers. Switch the I2C address of the device through the DIP switch on the circuit board to ensure that the four-layer module gets different addresses, thus avoiding the problem of address duplication. The module is very fast, easy to install, and supports multi-language development, making it ideal for smart home projects. PS: The 4pin pin is a backup that supplies power to future products. You can ignore those pins. Please do not connect any device to that pins. Package includes: 1 x 4 channel relay hat board. 4 x M2.5x16 copper sticks. 8 x M2.5 x 12 screws. 1 x instructions. Review: Works as expected, thanks - Works as expected, thanks Review: Easy to configure and use - As others have mentioned, the silk screen printing for the relay connections is wrong. Normally open (N/O) is actually normally closed (N/C) and vice versa. Check the connections for yourself with a meter. The board is very easy to use, just follow the instructions. You do need some knowledge of programming a Raspberry Pi, but everything needed can be found on the internet. While there is a rating of 250 Volts for the relay contacts, the board is not safe for use with mains Voltages. Just be realistic and switch low Voltages, such as 12 Volts. It would have been a 5* review if the screen printing had been corrected. ## Features - The 4-channel relay cap board for Raspberry Pi is part of the "docker pi" module. It has a 4-channel relay that you can add to your smart home project.Can be accessed programmatically or directly by shell. It also uses high-quality relay modules combined with the most common microcontroller technology to communicate with the Raspberry Pi. - Can be accessed programmatically or directly by shell.Switch the I2C address of the device using the DIP switch located on the PCB to ensure that the four-layer module gets different addresses, thus avoiding the problem of address duplication. - The relay module is very fast, easy to install and supports multilingual development, making it ideal for smart home projects. It supports multiple modules stacked for use. - WIKI: https://wiki.52pi.com/index.php/4_Channel_Relay_Hat_Board_For_Raspberry_Pi_SKU:_EP-0099 - Package includes: 1 x 4-channel relay cap panel, 4 x M2.5 x 16 copper stick, 8 x M2.5 x 12 screws, 1 x instructions ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07Q2P9D7K | | Best Sellers Rank | 159,328 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 488 in Barebone PCs | | Box Contents | 1x 4 Channel Relay Hat Board, 4x M2.5x16 copper stick, 8x M2.5x12 screws, 1x Instructions | | Brand | GeeekPi | | Brand Name | GeeekPi | | CPU Model | ARMv7 | | CPU model | ARMv7 | | Compatible Devices | Raspberry Pi 4 Model B, Raspberry Pi 3 Model B+, Raspberry Pi 3 Model B, Raspberry Pi 2 Model B | | Connectivity technology | I2C , Infrared | | Customer Reviews | 4.4 out of 5 stars 101 Reviews | | Included components | 1x 4 Channel Relay Hat Board, 4x M2.5x16 copper stick, 8x M2.5x12 screws, 1x Instructions | | Manufacturer | GeeekPi | | Manufacturer Part Number | EP-0099 | | Model Name | Raspberry Pi 4 Model B | | Model Number | EP-0099 | | Model name | Raspberry Pi 4 Model B | | Network Connectivity Technology | I2C, Infrared | | Operating System | Raspberry Pi OS (ehemals Raspbian) | | Operating system | Raspberry Pi OS (ehemals Raspbian) | | Processor Brand | ARM | | Processor Count | 1 | | RAM Memory Technology | LPDDR2, LPDDR4 | | Total USB Ports | 4 | | UPC | 703501206048 703501206536 | | Wireless Compability | Infrared | ## Product Details - **Brand:** GeeekPi - **Connectivity technology:** I2C, Infrared - **Included components:** 1x 4 Channel Relay Hat Board, 4x M2.5x16 copper stick, 8x M2.5x12 screws, 1x Instructions - **Model name:** Raspberry Pi 4 Model B - **Operating system:** Raspberry Pi OS (ehemals Raspbian) ## Images ![GeeekPi Expansion Board 4 Channel Relay Module for Raspberry Pi 3/2 B, 3 Model B+ & 4 Model B (No Programming Required/Programmable) - Image 1](https://m.media-amazon.com/images/I/61dkc1seTpL.jpg) ![GeeekPi Expansion Board 4 Channel Relay Module for Raspberry Pi 3/2 B, 3 Model B+ & 4 Model B (No Programming Required/Programmable) - Image 2](https://m.media-amazon.com/images/I/61PLbOdR3fL.jpg) ![GeeekPi Expansion Board 4 Channel Relay Module for Raspberry Pi 3/2 B, 3 Model B+ & 4 Model B (No Programming Required/Programmable) - Image 3](https://m.media-amazon.com/images/I/71cBuWrvu1L.jpg) ![GeeekPi Expansion Board 4 Channel Relay Module for Raspberry Pi 3/2 B, 3 Model B+ & 4 Model B (No Programming Required/Programmable) - Image 4](https://m.media-amazon.com/images/I/71JhaGug-FL.jpg) ![GeeekPi Expansion Board 4 Channel Relay Module for Raspberry Pi 3/2 B, 3 Model B+ & 4 Model B (No Programming Required/Programmable) - Image 5](https://m.media-amazon.com/images/I/71-lJqsDlKL.jpg) ## Questions & Answers **Q: Is a 3A relay enough for home heatpump and airconditioning?** A: Not if u use it to switch the compressor. yes if its just for the thermostat **Q: Is it possible to connect an i2c (si7021 temp/humidity sensor) to the i2c pins 3 and 5 when using this hat?** A: As this board can be stacked, it has male pins on top, so you definitely physically can connect something to the pins. I guess you'll only need to take care of the I2C address you use to not interfere with the ones of the relay board(s) **Q: Does this board have optocouplers to prevent high voltage interference?** A: Dont think so. I wouldn't use it for high voltage anyway. See my review **Q: Can i use gpio pins for inputs and use the relay board too?** A: Yes you can. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works as expected, thanks *by I***N on 26 September 2022* Works as expected, thanks ### ⭐⭐⭐⭐ Easy to configure and use *by M***D on 5 July 2024* As others have mentioned, the silk screen printing for the relay connections is wrong. Normally open (N/O) is actually normally closed (N/C) and vice versa. Check the connections for yourself with a meter. The board is very easy to use, just follow the instructions. You do need some knowledge of programming a Raspberry Pi, but everything needed can be found on the internet. While there is a rating of 250 Volts for the relay contacts, the board is not safe for use with mains Voltages. Just be realistic and switch low Voltages, such as 12 Volts. It would have been a 5* review if the screen printing had been corrected. ### ⭐⭐⭐⭐⭐ Great little relay board! *by V***I on 21 June 2019* I am using this board to control four 24VAC irrigation valves with a Raspberry Pi 3 B+ to fill (and not overfill) a 2000 gallon cistern and control the backflush of the filter when the output pressure drops (monitored using pressure transducers and an ADC). I really like that this board uses I2C to communicate with the Pi. It's easy to stack several of these boards to get additional relay channels. It has a nice pass through header, so you can still attack your other devices and sensors. Bottom line, it works perfectly. I highly recommend this board for applications where you don't need more than three amps per channel. ## Frequently Bought Together - GeeekPi 4 Channel Relay Board Module for Raspberry Pi, Power Relay Module for Raspberry Pi 4B & Raspberry Pi 3 Model B+ & Raspberry Pi 3/2 Model B (No Programming Required/Programmable) - HCDC RPi GPIO Status LED & Terminal Block Breakout Board HAT for Raspberry Pi A+ 3A+ B+ 2B 3B 3B+ 4B - Raspberry Pi 4 Model B 2019 Quad Core 64 Bit WiFi Bluetooth (4GB) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/236259467-geeekpi-expansion-board-4-channel-relay-module-for-raspberry-pi](https://www.desertcart.tn/products/236259467-geeekpi-expansion-board-4-channel-relay-module-for-raspberry-pi) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-03*