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Questions tagged [sim800l]

46 questions
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SIM800L sending email - SMTPSEND: 61 - Network Error

Hello all I'm trying to send a very basic email to myself using my raspberry pi and a sim800l module... however, it cannot send a basic message to myself. I've used it with an arduino so I know that the module is okay but cannot seem to get the rest…
Forester King
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HTTP json post on SİM800L problem. HTTPACTION responses are 301, 603 and 606

#include \ String apn = "internet"; //APN String apn_u = ""; //APN-Username String apn_p = ""; //APN-Password String url = "https://airpm.io/denek/GetData"; //URL of Server -…
sir-user
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SIM 800L send data over http

Hi i am make beehive scale with loot function, published under gnu/gpl v3. here is link: https://jbmprojekty-sk.translate.goog/aboutbh.php?_x_tr_sch=http&_x_tr_sl=sk&_x_tr_tl=en&_x_tr_hl=sk&_x_tr_pto=wapp I have big problem, i need send values from…
froshy
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Sending POST request to HTTPS clould function by using sim 800l module

hiii, This is for Sending HTTPS POST request to clould function server by using sim800l gprs module.the main problem is its could not send the data to server but its connects the server and its shows bad request 400.I can't understand the…
udaya shankar kanuri
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TTGO ESP32 + GSM 800l - Read SMS - TinyGSM

on my code i can send an sms to my target number but i don't know how to read or receive sms from target number the tinyGSM library doesn't have the read member function and i don't know how to use AT commands void setup() { // Set console baud…
Hezekiel Nkambule
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Problem arduino uno sketch and sim 800l modem

The code works ok on the serial monitor and I can ses in the serial monitor that the code makes the AT command for sending a reply by sms but it doesn't send and I can't control the sketch by SMS. I can't figure out what goes wrong. It's a long…
spk
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Making the SIM800L GSM module to send its own phone number when making a voice call

I connected the GSM module to an Arduino Mini Pro and control it with AT commands. I can make a phone call, but the calle phone does not display the callers number. It displays "No caller ID". Although if i put the same SIM card into an old mobile…
Cséb
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Code to check if SIM800L successfully sends a text message

I wanted to know if there is any code to check if a sim800L successfully sends a text message. I will need this code so that every time my sim800L sends a text message successfully it would light up a LED light. I am also using a nodemcu-32S as my…
How
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AT command only sending sms to the first recipient in a for loop

I created a simple class with a simple method to send an sms to a number: class SIM800L: def __init__(self, port): self.port = port self.com = serial.Serial(self.port, baudrate = 9600, timeout = 0.5) def…
Eugene Levinson
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How to select APN automatically in SIM800L GPRS module interfacing with ESP32

I have been working on a SIM800L GPRS module with ESP32. My purpose is to post data to a IoT platform using GPRS. I'm using sim800l library. Here in the code i want to provide apn manually like this, const char APN[] = "airtelgprs.com"; is there any…
Sayooj K K
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+HTTPACTION= 0,200,351 can't post data

I'm using a Sim800L module connected to an Arduino, and trying to send data to a web server using the AT commands. Usually, by doing the send procedure (manually, by writing each line of code on the Arduino serial monitor) in order to upload the…
Alessandro Cerro
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Swap PubSubClient Provider

I'm using MQTT over ESP8266 and SIM800, they both work fine. I need to change dinamically, between WiFi and GPRS, depending on WiFi availability. My problem is, I cannot dinamically change PubSubClient, it just won't work. A simplified example of…
Pedro Mancuso
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GSM MQTT+CMT(SMS Reading)

I'm working a code to pubsub over GSM SIM800L and ARDUINO MEGA. I'm able to workout MQTT fine, using ElementzOnline / SIM800_MQTT code. I'm now having trouble to use MQTT alongside SMSReading (+CMT) and Call Receiving. I've made a RecSMS() to…
Pedro Mancuso
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Arduino mega SIM800l special characters

I have a problem with the Arduino mega board and the SIM800L module I connect to the RX and TX pins of the module and when I enter the serial monitor it returns these characters, what could it be? void setup() { Serial.begin(9600); //Begin…
German Garcia
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How to detect if an AT modem originated call was rejected

I'm not sure whether this questions fits here or at electrical engineering stack exchange. Nevertheless... I have an SIM800L modem controlled through serial port. Inserted SIM belongs to an O2 Czech Republic operator (230 02). When I make a call…
rudolfdobias
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