SIM800L Not Connected to Network? Ultimate Troubleshooting Guide | (GSM IoT Series #2)
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Struggling to get your SIM800L GSM module connected to the network? In Part 2 of our ESP32 IoT Series, we troubleshoot the most common SIM800L issues: blinking LEDs, power instability, and network failures.
I demonstrate exactly why your module keeps resetting and how to fix it using a capacitor and a voltage booster for battery-powered projects.
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Code use in this video - https://github.com/ittipu/IoT_Bhai_Yo...
** In this video, you’ll learn **
Correct SIM800L wiring with ESP32
How to solve power and reset issues
Troubleshooting network registration problems
Fixing baud rate and serial mismatches
Common mistakes with SIM800L & ESP32
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*Hardware Used:*
ESP32 Development Board (38-pin)
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SIM800L GSM Module (Micro SIM)
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18650 Li-ion Battery (3.7V) & Holder
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470uF or 1000uF Capacitor (Crucial!)
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Breadboard
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DC-DC Booster Module (MT3608 or similar) if you use a Battery(Optional)
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Connecting wire
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MicroUSB Cable
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** Chapters: **
00:00 - Introduction: Common SIM800L Issues
00:58 - Pinout Guide: SIM800L to ESP32
02:14 - Circuit Diagram & The "Magic" Capacitor
03:08 - LED Status Explained: Fast vs. Slow Blinking
04:21 - DEMO: What happens without a Capacitor?
05:32 - Battery Power Guide: Using 18650 & 5V Booster
07:35 - TinyGSM Code Walkthrough & Config
10:43 - Error Testing: No SIM Card / Low Power
13:25 - Why SIM800L needs 2A Peak Current
14:50 - Conclusion & Next Steps
Whether you’re getting no response from SIM800L, stuck on "AT command not working", or facing network connection issues, this video will guide you through a step-by-step solution.
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