How do I send data to my server from sim800 / sim900 using MQTT protocol...

Sending Concatenated SMS (with more than 160 chars) in text mode...

sending Json data to server using AT commands...

Sending message to a number stored as String in Arduino...

Arduino Uno + GSM Shield SIM900 TCP Client Dont Receive Data...

Arduino Uno R3 + SIM900...

SIM900 GPRS: Consecutive AT+CIPSEND...

Error: Invalid number format while sending SMS with SIM800L...

Getting bad request response When sending data to server using SIM900...

Strange encoded response to AT commands...

Arduino GSM SIM900 does not receiving messages...

sscanf parse response with whitespaces...

Server disables page after several GET requests from SIM908...

Raspberry Pi sim900 Default Internet Access...

SIM900: How to be sure how much time to wait between serial(UART) transmit and receive...

AT Command to change frame size gives ERROR...

SIM900 Data usage Get Vs Post...

AT commands for sim900 to find sim card number...

sim900a sms take long time to arrive...

What is proper way to read and delete message from SIM900?...