Adafruit Ultimate GPS sendCommand

[Silhouette]

EDIT: Solved, Problem was with not sending "\r\n" at the end of the sentence
I'm trying to control Adafruit Ultimate GPS through STM32F407, there is an official Arduino [Library][1] and this library has a **sendCommand()** function. I'm trying to implement this sendCommand() function in Keil using HAL library

Code: Select all

   // arduino command for setting antenna off
    GPS.sendCommand("$PGCMD,33,0*6D\n");

In keil I wrote these lines

Code: Select all

uint8_t Tx_Buffer[100];
    int size;

    // Turn off antenna update nuisance data
    size = sprintf(Tx_Buffer,"$PGCMD,33,0*6D\n");
    HAL_UART_Transmit(&huart1, Tx_Buffer, size, 100);
    HAL_Delay(100);

    // Set the update speed
    size = sprintf(Tx_Buffer,"$PMTK220,500*2B");
    HAL_UART_Transmit(&huart1, Tx_Buffer, size, 100);
    HAL_Delay(100);
    
    // Request RMC and GGA sentences only
    size = sprintf(Tx_Buffer,"$PMTK314,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*28\n");	
    HAL_UART_Transmit(&huart1, Tx_Buffer ,size, 100);
    HAL_Delay(1000);

However, it seems that I am not changing anyting because it is still giving data in defaults settings. UART Baudrate is 9600 (Transmit and receive)

Can you help me with the C code? Thanks in advance.

[1]: https://github.com/adafruit/Adafruit_GP ... it_GPS.cpp

[adafruit_support_mike]

The GPS module doesn't recognize a command until it sees an "\r\n" line terminator. It looks like you're only sending "\n".

[Silhouette]

Thank you for your answer. I have tried sending it with \n\r many times which I believe is wrong, silly me I haven't thought of changing the order to \r\n. It is working now, thanks again.

[adafruit_support_mike]

Glad to hear that did it. Happy hacking!