Uploaded May 2025 | Updated September 2026, 3 weeks ago

---

Monitor Door(is it open or closed) from 20km or 13 mile for free using ESP32 with LoRa . Watch the video: youtu.be/-YWocAllrbA

In this video, I’ll show you how to wirelessly wirelessly control real devices line fand, motor, doors using a relay and turn on a buzzers using the Heltec WiFi LoRa 32 (v3) module packed inside the Meshnology N32 Case, powered by a 3000mAh battery. This system uses LoRa (Long Range Radio) communication, allowing you to send and receive signals up to 21km (13 miles) for free..
📚⬇️ Download and resource page robojax.com/RJT617


📌Meshnology N32 Case (with battery slot & protection)
Amazon Canada: amazon.ca/dp/B0F37JX1TJ
Meshnology Website: meshnology.com

📌All Packages on Amazon (N32, 3000mAh and WiFi LoRa 32):
Amazon USA: amzn.to/3Su6vf0
Meshnology Website: meshnology.com
🔥Amazon USA (with 1000mAh 🔋 or 3000mAh🔋) : amzn.to/45O15n7


Heltec WiFi LoRa 32 V3
📌From Amazon (with 1000mA and 3000mA) : amzn.to/45O15n7
📌eBay ebay.us/NQq3vD
📌AliExpress: https://s.click.aliexpress.com/e/_oFX7Jpc
📌Banggood: banggood.com/custlink/G3v8AmMNwi

High-Gain Antenna (extends range beyond 13 miles)
Amazon : amzn.to/3FkiQ2s


*** Documentation and Resources ***
Visit Meshnology website meshnology.com
Heltec Documentation: docs.heltec.org/en/node/esp32/esp32_general_docs/quick_start.html


We’ll go through:
How to set up the transmitter and receiver
Full wiring and code explanation
Relay and buzzer control from miles away
Real-world range test over water and terrain
How to expand your setup with high-gain antennas
How to install all required Arduino libraries and board packages
This is Project 3 of 4 in our Robojax LoRa series. You’ll also find:

🚀Related Video:
🚀Related Video:
Sending Temperature over LoRa (N3): youtu.be/76UR9dDuf-k
Battery/Solar monitoring send Voltage over LoRa (N33): youtu.be/rOVVl9EI-So
Turn on/off devices over LoRa: youtu.be/lhLQqG5H8_M
Door Monitoring alert over LoRa: youtu.be/-YWocAllrbA
Control Servo Motor over LoRa band: youtu.be/EPynuJ7sasY
Turn on/off devices over LoRa (N35): youtu.be/W9FMmBFljXc
Pocket Sized LoRa Messenger: youtu.be/IsOSvrF60J4
Meshpocket Meshtastic Power bank: youtu.be/FYHrTWS00n4


Use Chapters from timeline or click on the time
00:00 Start
1:56 Project Explained
4:55 LoRa and Meshnology N32 package
9:26 Putting N32 together
13:51 Wiring a relay
16:43 Wiring a buzzer
21:47 Board and library
26:08 Transmission Code 1
28:08 Transmission Code 2
29:01 Receiver Code
29:57 Demo: Relay ON/OFF
30:45 Demo: Toggle
31:32 Demo: Buzzer Toggle
23:26 Demo: Buzzer ON/OFF
33:04 Range Demonstration
37:02 Conclusion

#robojax #meshnology #heltec

----------- Robojax.com -----------
Website: robojax.com
All tutorials: robojax.com/tutorial_categories.php?lang=en
Downloads files: robojax.com/files.php?lang=en

If you found this tutorial helpful, please support me so I can continue creating contents like this. (PayPal):
🔥paypal.me/robojaxTV
Follow me on Facebook fb.me/robojaxTV
Follow me on TikTok tiktok.com/@robojaxtv
Follow me on Twitter: twitter.com/robojaxTV
Follow me on Instagram: instagram.com/robojax