ESP32 SIM800L | Send and Receive SMS to Control Relay
ฝัง
- เผยแพร่เมื่อ 14 เม.ย. 2021
- In this video I will show you how to control relay module with ESP32 SIM800L by using Arduino IDE. When you want to control AC load connected to the relay, you will have to send an SMS to control the AC load (fan, bulb). You will also receive a response SMS showing the status of the relay (ON or OFF). You do not need of TTGO ESP32. I am using sim800l GSM module with esp32. Also you do not need any Arduino library with this esp32 GSM module project. This is a simple esp32 home automation project to control home appliances from anywhere in the world using sim800l GSM module and relay module.
--------------------------------------------------------------------------------------------------------------------
Parts Buy Links (Affiliate Links)
--------------------------------------------------------------------------------------------------------------------
1. ESP32 - amzn.to/3YCq2dS
2. SIM800L GSM Module - amzn.to/3l6rKGP
3. Relay Module - amzn.to/3l1aoem
4. 18650 3.7v Rechargeable Battery - amzn.to/3ZAxV51
--------------------------------------------------------------------------------------------------------------------
Useful Video Links
--------------------------------------------------------------------------------------------------------------------
Sim800L MIT App Inventor Relay Control
• GSM Based Home Automat...
--------------------------------------------------------------------------------------------------------------------
Social Media Links
--------------------------------------------------------------------------------------------------------------------
GitHub:
github.com/ahmadlogs/
TH-cam:
th-cam.com/users/ahmadlogs?sub...
--------------------------------------------------------------------------------------------------------------------
Download Code
--------------------------------------------------------------------------------------------------------------------
github.com/ahmadlogs/arduino-...
--------------------------------------------------------------------------------------------------------------------
Disclaimer
--------------------------------------------------------------------------------------------------------------------
Disclaimer: All videos are for educational purposes and use them wisely. Any video may have a slight mistake, please take decisions based on your research. This video is not forcing anything on you.
Warning: I will use High Voltages which if incorrectly or improperly used could result in serious injuries or death. So be careful of what you are doing because I will take no responsibility for any of your actions.
Warning: In some countries it is required to register gsm module from govt authorities before using it. So, get proper understanding of govt laws related to gsm technologies.
#esp32 #sim800l #homeAutomation
No words man.. you did every possible things with sim800L. and you provide openly.. salute to your efforts. we understand how much time you spend to doing this... thank you...
Thanks a ton
nice projekt but after power los i need to reset the esp 32 board. is there a way to solve this problem
Hi Ahmad, I did step by step the project, but when I send "Relay1 on" nothing happens and in serial monitor I can see: AT+CMGR=36, +CMGR: "REC Unread", "+my phone number", "", "date, time", Relay1 on. Could you advise what type of error is it? Have you faced with the issue?
THANKS!! Your sketch is working with esp32 and sim800L. Its help me.
Glad it works
its ok, but i need SIM800L with esp32 connected with wifi relay for distance light
hey rather than AC power would using just the relay be able to remotely power off a PC or a TV(something with a soft off button) ?
yes you can
Hello, nice video brother. Can you kindly let me know if we can connect the GSM SIM800L module with node MCU ESP32 using the same configuration? And the code? We want to get the GSM internet, 2g/3g signals from the sim and use it with ESP32. kindly help
yes you can. I did not test it. but it must works with nodemcu esp32
Help!
I don't get a reply message from the sim800L module.
I have used a 3.7V LiPo Battery with the SIM800L.
ESP32 is powered by the USB port.
Red light is constantly blinking on the sim800L with 3 second intervals. Both LEDs on ESP32 are turned on.
I am using a jazz sim.
I am using the helical antenna that came with the module.
It mean your module is working fine. I think there is some issue with your rx and tx connections.
1. your sim card must have balance or you activate sms bundle.
2. Try changing the baud rate
3. check your rx and tx connection, Try to connect without breadboard
@@AhmadLogs UPDATE:
It worked! 😄 I made the ground common and set the baud rate to 115200.
Thankyou!!! I wanted to use this in a bigger project for long distance communication.
@@retrohd1_ bravo
Greatt job! i've a question: it is possible and safe to supply the gsm module with battery 5v and 10000 mAh ?
most of sim800l works with 3.4v to 4.4v. there are just few sim800l that works on 5v. if you provide 5v to sim800l it does not work properly. try to provide between 3.3 to 4.4v
@@AhmadLogs should i power it with a battery 3.7 v and 7000 mAh?
@@anas.ghouila yes, I am using 7800mAh
Great video, Can you know if the module works with thingsmobile SIM?
unfortunately not.
How many lamps can I control at the same time or each one in sequence?
you may use 8 channel or even 16 channel relay module with external power to relay module. you also need to modify the code for your number of relays
hello dear
Sorry I had a question I want to control an electrical device through esp32 and GSM800L by phone my code and things all worked well the first time but then sent a delay complaint the problem is with GSM or esp32 if you can help me I would be grateful
give me some more detail. what do you mean by sent a delay conplaint?
Hi, Please reply!!!
I have been stuck for day on my GSM module SIM800L. I have tried using JAZZ 4G,2G, UFONE and ZONG sims but is not connecting to the network. I tried using using this exact code and wiring connecting and powered my GSM module with 3.7 volts lithium battery.
Kindly tell me what should I do?
PS. I have even registered my GSM module with PTA.
I am also using only helical antenna which is soldered on the connector pin.
most of the time it is power issue. which battery you are using to power sim800l
@@AhmadLogs The LED on SIM800L is blinking after each second.
I am using the battery "ICR18650P-TS13" which gives 3.7V.
@@alimoaz try to use a capacitor (470uf 25v). connect capacitor negative pin to sim800l ground and capacitor positive pin to sim800l vcc pin.
@@AhmadLogs okay now the markets are closed... I will do this first thing in the morning and let you know about the result
ok
I'm getting this type of error:
invalid conversion from 'int' to 'SerialMode' [-fpermissive]
This is just a syntax error. You have made changes in the code, and you have added some invalid code in the main sketch. I will have to take a look at your code to figure out the issue
Sim800l working on 2g sim ?, now all the operators using 4 g Sims only what can I do?
then you might use sim900A
Please, I have a problem when writing pineMode (7,OUTPUT) The relay works directly without typing HIGH
you must use normally closed (NC) and common (COM) pin to connect ac load.
@@AhmadLogs
The relay is closed immediately when writing pinMode
@@moussaab8292 after pinMode() function, on the next line add digitalWrite() to send HIGH signal to control the relay.
@@AhmadLogs
Thank you for helping me the relay no longer closes but does this affect the code while writing it in void loop
@@moussaab8292 no it does not.
have you test the relay without any micro-controller?
Can we do the same with nodemcu and gsm800
no, you need to modify the code
Sir kia aap received message ko aik variable me save karna bata sakte hain.. Btw I subscribed nice video!
Mere paas bhi SIM800L hai
I have save sms in one variable. read the code carefully, message is stored in "msg" variable.
@@ghstrider100 hmmmm....
Sir can you make a tutorial on just to save a message in a variable? That would be so helpful
@@ghstrider100 OK, I will try to make a video on it soon.
Hello. I want to add DHT 11 temperature sensor in this code, but I couldn't, can you help me?
1. Connect the DHT11 sensor to your Arduino
2. Download and install the DHT library for Arduino from the Arduino IDE library manager.
3. Include the DHT library at the beginning of your code by adding this line: #include
4. Define the DHT11 sensor pin by adding this line at the beginning of your code: #define DHTPIN 2
5.Initialize the DHT11 sensor by adding this line to your setup() function: dht.begin();
6. Read the temperature and humidity values from the DHT11 sensor by adding this code to your loop() function:
float humidity = dht.readHumidity();
float temperature = dht.readTemperature();
7. Send the temperature and humidity values to the SIM800L module by adding this code to your loop() function:
sim800l.print("AT+CMGS="+1234567890"
"); // Replace with your phone number
sim800l.print("Temperature: ");
sim800l.print(temperature);
sim800l.print("C, Humidity: ");
sim800l.print(humidity);
sim800l.write(26);
Note: Replace the phone number in the code with your own phone number. Also, adjust the code to fit your specific project requirements.
@@AhmadLogs when i send dht11 sms send me the values as sms same as role hungry
Hi
I got this eror 👇
Use of undeclared identifier 'parseDada'
Use of undeclared identifier 'extractSms'
Use of undeclared identifier 'doAction'
Use of undeclared identifier 'Replay'
Please help me, i need to fixed for my project
you have made some severe change in the code. that's why you are facing the issue. so download and use the fresh copy of the code
Nice video esp32 communicate with sim 800 but relay output not working plz help me relay not on or off
please give me some details
@@AhmadLogs thanks for reply OK what details you need I send you
@@AhmadLogsserial monitor show i send msg relay1 on but relay also is on
@@BABATECHNICALKNOWLEDGE have you connected the relay correctly?
can i use the code with gsm sim900a ?
dtmf th-cam.com/video/Hq1ZGWWc0e4/w-d-xo.html
Can you tell me about AT comment to delete all sms
at+cmgd=1,4
I follow the same but the serial monitor shows me another data
can you please tell me what data is displaying in the serial monitor
@@AhmadLogsI have tried serial port 1 & 2 but both are printing the same
@@crazytronics9917 what is printing on serial monitor
@@AhmadLogs guru meditation error load prohibited
@@AhmadLogs i have sent you the pics of serial monitor on your facebook
can i use the code in esp8266
no. watch this for esp8266 th-cam.com/video/7CXlOPPGdN4/w-d-xo.html
I try it so many times but is not replying me everytime i send sms and nothing happens on relay huhu help me
what displayed in serial monitor
👍👍👍👍👍👍👍💪
thanks
hi
can i use this code for esp32 wrover
yes, It must work
@@AhmadLogs tanx
@@alirezasarrami1955 so nice of you
@@AhmadLogs hi again
i use your library to connect whit sim800l but UARAT pin's are Different in esp32 WROVER
i changed the pin's but it did not work
what should i do ?
is sim800l work whit UART or virtual UART in your library?
@@alirezasarrami1955 sim800l works both with hardware serial and software serial. have you sim800l working? may be issue with power supply for sim800l
Excelent! One remark: For me the "senderNumber = buff.substring(0, 13);" was too short, my phone number has 14 digits.
exact. That happens to me too. How did you solve it?
@@Gusfus128
--> senderNumber = buff.substring(0, 14); and next line:
--> buff.remove(0,20);
worked for me.
@@esp3263 thanks!!
then you can use buff.substring(0, 14);
you also need to change the subsequent substring function as well
Will this work with esp8266 ?