Questions tagged [at-commands]

AT commands are used to control MODEMs, such as GSM/GPRS/bluetooth modules.

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AT commands no answers ! SIM808 and Arduino

I will try to explain my problem... I'm using a SIM808 GSM-GPS click module and a ARDUINO nano 33 IoT board, I'm sending the command "AT\r" thanks to the TX port from the ARDUINO board to ...
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408 views

Error sending SMS to SIM900 in PIC

I am trying to interface SIM900 with PIC18F2520. I need to send SMS to a particular cell number. According to AT commands, ...
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17 views

How to send message in websocket connected to my server from Quectel EC20 through AT Commands?

I made a Websocket connection from Quectel EC20 after opening TCP connection by giving IP and PORT and after that I sent GET req where header upgrade to websocket through AT Commands but I am not able ...
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13 views

SIMCom module (SIM7605CE/SIM7600CE) not responding to AT commands from ESP32

I connected an ESP32 module to a SIMCom module with the name SIM7605CE (shown below). The connection was quite straightforward. I connected the ESP32 to my PC and the SimModule to a DC generator (...
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34 views

Send AT commands from Arduino to Xbee (RX/TX)

I'm trying to setup some of the IOs on my XBEE SX 868 from my Arduino but yet I didn't achieved for some reasons. When typing my commands in the Console Log of XCTU, my XBEE is responding and ...
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24 views

Having trouble setting up a data call via AT Commands and using the wifi chip as a hotspot

I have a WiFi chip embedded on an evaluation board which also has an application processor which runs A-grade Linux, in addition to a modem processor. I want to set it as a hotspot via hostapd which I ...
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46 views

SIM 7600ei AT command error while sending GET request

I am using the SIM7600ei module with a 4g LTE Sim. I am successfully able to get the IP address. ...
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1answer
84 views

Why does the Atmega328 USART get trapped in a loop?

I have an Atmega328 micrprocessor. I connected its RX/TX pins to an SIM808 module and uploaded this code to the processor to communicate with it and send commands: ...
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38 views

GSM SIM800C not responding

I'm using Arduino IDE software Arduino Uno board GSM SIM800C BSNL 4g SIM card Interfacing RX (of GSM) to PIN 2 (of Arduino) TX (of GSM) to PIN 3 (of Arduino) GND to GND Power supply For Arduino - ...
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35 views

What does “Power Off OOL” AT command mean for a Bluetooth module?

I am reading the datasheet for the OVC3860 Bluetooth module and one of the AT commands is 4.50 Power Off OOL #VX. The description from page 21 of the datasheet is below. [] What does OOL mean in ...
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283 views

How does GSM Module store incoming SMS in its “SM” or “ME” memory?

I am using AI Thinker A7 GSM/GPRS/GPS Module demo v7.1.(The Rx, TX, GND pins of this module are connected to tx, rx, gnd pins of the prolific Rs232-TTL converter and a virtual com port is open in ...
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989 views

Enabling SD card access on SIM808

I am currently working with SIMCom's SIM808 2G+GPS modem. In my setup, an MCU communicates with the modem over UART to save some data in the SIM808's filesystem. As the modem's built-in memory is < ...
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469 views

Problem in connecting to a server waiting for a TCP request using ESP8266

I'm using ESP8266 for connecting to a appspot-preview.l.google.com server which listens for TCP request and answers back a number (it's for training purposes). ...