IoT Bhai

The default (non-TLS) MQTT port is…

8 hours ago | [YT] | 0

IoT Bhai

In MQTT, what is the job of the broker?

1 day ago | [YT] | 0

IoT Bhai

I used to use the DHT22 in many of my ESP32 projects. It’s cheap, simple, and honestly a great sensor for getting started. But when you start working on industrial or battery-powered IoT projects, you begin to notice its limitations.

For example, the DHT22 needs around 2 seconds between readings.

That may be perfectly fine for a home project. But for a system that needs to respond quickly, it can become a problem. Recently, I compared it with the SHTC3, and the difference was interesting:

⚡ Much faster measurements
🎯 Better temperature accuracy
🔋 Very low power consumption
🔌 Clean I²C communication

It made me realize that choosing a sensor isn't just about “does it work?” It's about choosing the right sensor for the job. For a simple project, I'd still happily use a DHT22. But for a new industrial or battery-powered IoT design, I'd seriously consider the SHTC3.
[Video Link In Description]

What temperature & humidity sensor do you normally use in your projects?

1 day ago | [YT] | 0

IoT Bhai

What does LoRa actually stand for?

5 days ago | [YT] | 0

IoT Bhai

How many CPU cores does the classic ESP32-WROOM-32 have?

6 days ago | [YT] | 5

IoT Bhai

A client wants SMS control for a heater in a remote cabin. Why should "HEATER ON" also start a timeout timer in your code?

2 weeks ago | [YT] | 0

IoT Bhai

Are you still using old 2G GSM modules like the SIM800L? With 2G networks shutting down in many places, it's definitely time to upgrade to a proper 4G LTE modem.
No WiFi. No cloud. No monthly subscription. Just a SIM card.

In my latest video, I walk through working with the LilyGO T-Call A7670E 4G LTE modem powered by the ESP32!
[Video Link in Comments]

3 weeks ago | [YT] | 8

IoT Bhai

Your SMS-controlled gate opener is installed in a metal control box. Signal quality (CSQ) reads 4. What should you do?

3 weeks ago | [YT] | 1

IoT Bhai

What does AT+CMGF=1 do?

3 weeks ago | [YT] | 0

IoT Bhai

Hey everyone!
👋 Still using the classic SIM800L for your IoT projects?
With 2G networks shutting down in many places, it might be time for an upgrade.
In my newest video on the IoT Bhai channel, I’m showing you how to easily move up to 4G LTE using the LilyGo T-Call A7670E ESP32 module.
Here is what we cover in the video:
✅ A quick look at the hardware differences between the old SIM800L and the new A7670E.
✅ How to properly set up the Nano SIM and antennas.
✅ Step-by-step code to get connected to your local cellular network and sync the time.

You can watch the full setup guide(Link in Comments)

1 month ago | [YT] | 15