How to build VoIP project on ESP32 Audio Kit

#ESP32 #ESPIDF #VoIP
Lecture: han-ya.blogspot.com/2021/09/e...

[@trungtintran8583]

I'm trying to make two-way voice streaming via wifi (UDP/IP) compatible with OBS or other streaming software. The audio quality must be at least 16bit 48Khz. Could I use Audio kit V2.2 for my project?

[@LuPeter1971]

My voip using SIP protocol. Codec are negotiated to 8kHz Mu-law. I can't say your quality 16bit/48k would be good or not.

[@RandomGuy-hi2jm]

Hey i have that exact board but when i flash any recording to sd card example the recorded file saves in sd card but i cant hear any sound in the recorded file. Please help what do i need to do. I'll appreciate if u tell in easy terms..

[@LuPeter1971]

1) check recording stream is working. Try to loopback mic stream to play stream, make sure streaming without error. 2) no error to write SD, and check if data is written to SD.

[@nexetfpv8037]

I can't compile because of this error: Bootloader binary size 0x6ee0 bytes. 0x120 bytes (1%) free. ninja: build stopped: subcommand failed. * The terminal process "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -Command ninja " terminated with exit code: 1.

[@LuPeter1971]

Not enough size ? I have no idea about the error.

[@cahyoariwibowo7624]

hi, i got problem after build : ninja: no work to do. [111/112] Linking CXX executable voip_app.elf FAILED: voip_app.elf how to solved?

[@LuPeter1971]

Check build environment setting. han-ya.blogspot.com/2021/09/esp32-audio-voip.html

[@cahyoariwibowo7624]

@@LuPeter1971 so need copy components manualy? i am first using, and export from ESP-ADF example..

[@LuPeter1971]

@@cahyoariwibowo7624 components automatically generated... actually it's copied from esp-adf folder.

[@cahyoariwibowo7624]

Yes, i see, whats encironment setting, have example? Its show include file not found in browse.path

[@LuPeter1971]

@@cahyoariwibowo7624 You may try "blink" easy example first.... and then figure out the build issue.

[@RodrigoDelAngelHurtado]

What application your are using?

[@LuPeter1971]

IP phone or tele-conference, such as kzbin.info/www/bejne/mmKcdWSnp9yqd7M

[@RodrigoDelAngelHurtado]

@@LuPeter1971 The application in the phone?

[@LuPeter1971]

WiFi VoIP application. ESP32 SDK provides SIP protocol for VoIP.

[@trojanking2922]

@@LuPeter1971 brother can you send me all the schematic diagram and coding

[@trojanking2922]

Please help me I need this project for my university

[@johanjoju3801]

Hello, after doing all steps mentioned in blog, when I try to build play_mp3_control code to know whether the configuration are correct or not, An error occurred after compilation, please guide error: 'GPIO_SEL_23' undeclared (first use in this function); did you mean 'GPIO_NUM_23'? 55 | #define TOUCH_SEL_PLAY GPIO_SEL_23 | ^~~~~~~~~~~ error: 'GPIO_SEL_18' undeclared (first use in this function); did you mean 'GPIO_NUM_18'? 56 | #define TOUCH_SEL_VOLUP GPIO_SEL_18 error: 'I2S_NUM_MAX' undeclared (first use in this function); did you mean 'I2C_NUM_MAX'? 93 | if (i2s_num >= I2S_NUM_MAX) | ^~~~~~~~~~~ | I2C_NUM_MAX error: 'PERIPHS_IO_MUX_GPIO0_U' undeclared (first use in this function) 107 | PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0_CLK_OUT1); error: 'FUNC_GPIO0_CLK_OUT1' undeclared (first use in this function) 107 | PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0_CLK_OUT1); error: 'PIN_CTRL' undeclared (first use in this function) 108 | WRITE_PERI_REG(PIN_CTRL, 0xFFF0); | ^~~~~~~~ | ^~~~~~~~~~~~~~~~~~~

[@LuPeter1971]

The error arises from the definition. You may check board_def.h、board_pins_config.c, which are related to your hardware.

[@johanjoju3801]

@@LuPeter1971 I am using ESP32-A1S 2974 where the codec IC is ES8388. Does the Play_mp3_control code directly works if I flash it in my hardware, I only changed PIN config. Please guide this is for my college project. If you have any document to get start working with ESP-ADF and ESP-IDF for A1S board kindly share me.

[@LuPeter1971]

@@johanjoju3801 "ES8388" chip, that is ESP32-Lyrat 4.3 board. Refer to the schematics of Lyrat 4.3 and look into the pin connection btw Codec and ESP32. Check the folder \esp-adf\components\audio_board, and \esp-adf\components\audio_hal I guess you need to modify some code or config in the folder.

[@johanjoju3801]

@@LuPeter1971 now the code has build successfully, can you please let me know where to configure the codec driver among the list of drivers, I mean where to configure the codec IC I am using in VS code menu config?

[@LuPeter1971]

@@johanjoju3801 study MakeFile: CMakeLists.txt, component.mk. You will know how to config and make file. BTW, in VS code, press "F1" to see ESP commands.

[@quangminhtran8356]

could you share how to make sip phone via stm32?

[@LuPeter1971]

Sorry, I don't have STM32 for SIP phone. 😂

[@quangminhtran8356]

@@LuPeter1971 could you share code esp32 for me?

[@LuPeter1971]

@@quangminhtran8356 github.com/yijenlu1971/voip