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  • iammb's Avatar
    08-06-2019, 05:29 AM
    iammb replied to a thread Audio transmitter in Project Guidance
    For transmission of wav file via gsm, first i have to write file to EFS(Encrypted file system) of gsm and then issue AT command to upload file. If i use low baud rate eg:115200, the data transfer takes so much time. For...
    8 replies | 215 view(s)
  • iammb's Avatar
    08-05-2019, 10:40 AM
    iammb replied to a thread Audio transmitter in Project Guidance
    Biggest incoming string coming from GSM is around 50-60 characters. I am using Serial1 at 921600 baud rate and core clock is set to 120Mhz. Code below is part of working code which records wav file and uploads it to...
    8 replies | 215 view(s)
  • iammb's Avatar
    08-05-2019, 09:43 AM
    iammb replied to a thread Audio transmitter in Project Guidance
    I want the device to record continuously and whatever time is left between waiting for queue to fill with audio data and writing samples to sd card, i want to send AT commands over UART.
    8 replies | 215 view(s)
  • iammb's Avatar
    07-28-2019, 06:02 PM
    Hi, I am working on a project where i want to upload audio files(.wav) to server using GSM. Device should record 10 sec audio files continuously but when controller is free(between writing samples to SD card) it should...
    8 replies | 215 view(s)
  • iammb's Avatar
    07-24-2019, 10:36 AM
    I read this post : https://forum.pjrc.com/threads/34327-Audio-library-and-SdFat-Library . If sdfat is faster than sd library, how to use it with audio library?
    8 replies | 138 view(s)
  • iammb's Avatar
    07-24-2019, 06:02 AM
    I searched on the forum and i came to know that SD fat library doesn't work with Audio library. So is there any other way to minimize these delay?
    8 replies | 138 view(s)
  • iammb's Avatar
    07-23-2019, 10:23 AM
    Hi, I am making a audio recorder with teensy3.5 and 3.6 using SPH0645 mems i2s mic from adafruit. I want the device to record 10sec audio continuously till the battery last(I am using 3.7v 2000mah lipo battery to...
    8 replies | 138 view(s)
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Audio transmitter 08-06-2019 05:29 AM
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