Questions tagged [sim800]
The sim800 tag has no usage guidance.
24
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Some characters lost in UART Transmission (PIC12F1822 -> SIM800L)
I am using the diagram recommended in the SIM800L datasheet to connect it to a PIC12F1822 MCU operating at 3.3V and 16MHz using its internal RC oscillator.
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How to simulate a finger touch electrically to remove noise
I am working on a project with "SIM800L" GSM module, the problem is that there is a noise from the module in the calls and it disappears when I touch the module's body with my hand.
Kindly, ...
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Sim7600 TLS data buffer size?
I use sim7600 module's TLS layer to connect the Azure IoT hub. I have problem with tls buffer size, which is 2kb(as datasheet says). It acts unexpectedly when i try to receive message more than 2kb in ...
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Sim800L can't send SMS
I know it is somehow weird problem, but I don't know what to do.
I am using SIM800L GSM module with ESP8266 nodemsu v3 and they are connected via UART serial communication.
I am using this code to ...
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SIM800L GSM module humming noise
I am trying to play audio over the call by using SIM800l
I am using this "DFPlayer mp3 module" to play audio and connected its AUDIO OUT to the MIC IN of "SIM800L GSM module" and I ...
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Can't get DTMF tones from sim800L gsm module
I am using esp8266 and sim800L gsm module to recieve incoming call and get the DTMF tones from the caller and take an action according to the received number, i am searching for about 3 days and found ...
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94
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SIM800C not working as expected
I've created a custom board with a SIM800C. I'll show the schematic above:
My VIN is aproximately 4.8V. MY "4V" line is constant. I'm able to comunicate with the module, but sometime's ...
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2
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445
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SIM800L external supply issue
I have built an Arduino project that sends data from sensors to a specific website using the SIM800L GSM module. My problem is when I power whole circuit it from a computer or a charger, it works fine....
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Why does the SIM800C stop sending data to the server after three days of continuous use?
I created a device that monitors air quality. The measured data is then sent to a web server using an ESP32 (programmed in C++ with Arduino framework) and SIM800C module, which stores them in an ...
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SIM900A: Network depersonalization required
I have made experience with sim 800l, it works like a charm. Now I got a new SIM900A module, interferencing it with (RP over python), AT command returns ok, and other basic AT commands, so not the ...
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STM32F401 UART noise
I have device with an STM32F401 and a SIM800L. When the SIM800L sends data I have noise (usually 1 byte) received by the STM32 on UART2 connected to the SIM800. If I use FTDI instead of STM32 I never ...
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415
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Guide for power supply for ATMega328 and SIM800L project
I am creating a data logger that uses:
ATMega328p - microcontroller
SD card module to read and write data
SIM800l - modem to transmit data from SD card to API
OLED I2C display
DHT22 temperature ...
- 121
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208
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How to combine SIM800L and Ethernet shield in one program?
I'm trying to use a SIM800L and Ethernet shield in one program. Separately they work perfectly, but they do not work together.
When I put the following code in the ...
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Send data to MQTT broker using SIM800 and ESP32
I'm working on a project in which I need to send data to an MQTT broker installed on a Raspberry Pi.
I refer to the tinyGSM library and this tutorial along with this example.
The ESP32 remains in ...
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194
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Gate of Logic level MOSFET connect to Esp32 gpio
I want to use IRLR024N logic MOSFET to switch on/off a Sim800L module. This module consume 2A for 500μs and then consume only 200mA. I supply this module with 4V. This MOSFET able to switch on this ...
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